Bars and rods of high-speed steel

1. Scope and Applicability

This PCR applies to mill-gate bars and rods whose steel grade is declared as high-speed steel. It covers the foreground conversion of a received high-speed-steel billet by reheating and hot working, together with the heat treatment, straightening, descaling, surface conditioning, cutting and inspection actually applied before the product leaves the producing site. The producer shall declare whether the delivered form is straight bar or rod/coil and shall identify the high-speed-steel grade, dimensions, hot-working technology and delivery condition.

The PCR excludes ordinary alloy-steel bars and rods that expressly exclude high-speed steel, silico-manganese-steel products, non-alloy-steel bars and rods, wire, hollow drill bars, flat-rolled high-speed-steel products, finished cutting tools and downstream fabrication into components. Primary steelmaking and casting before the received high-speed-steel billet are outside the foreground boundary and require an upstream dataset. Packaging, customer transport, use and end-of-life are outside the declared product system unless a study expands the scope and reports them separately.

2. Product Category Identity

Field	Value
canonical_pcr_id	pcr.metal-products-machinery-and-equipment.basic-metals.bars-and-rods-of-high-speed-steel
classification_refs	CPC 3.0: 41271, Bars and rods of high-speed steel
covered_products	Straight bars and rod or coiled-rod forms of declared high-speed-steel grades, in the as-hot-worked or producer-applied heat-treated and surface-finished delivery condition
excluded_products	Non-alloy-steel bars or rods; ordinary alloy-steel bars or rods that exclude high-speed steel; silico-manganese-steel products; wire; hollow drill bars; flat-rolled products; finished tools and fabricated components
representative_product	One mill-gate high-speed-steel bar or rod product lot conforming to its declared grade, dimensions and delivery condition
production_route	Received high-speed-steel billet is reheated and hot-worked by the declared rolling, forging, hot-drawing or extrusion route; only the heat treatment and surface-finishing operations actually used are included
market_state	Solid steel bar or rod at the producing-site gate, sold by net mass; straight or coiled form, surface condition and heat-treatment condition are declared

3. Reference Flow

Field	Value
What	High-speed-steel bar or rod supplied at the producing-site gate for downstream manufacture
How much	1 kg net product mass
How well	Conforming to the purchaser-declared high-speed-steel grade, dimensions, form, surface condition and delivery condition
How long or cycle	One completed production and dispatch lot; no use-phase service life is represented
reference_flow_link	1 kg of conforming mill-gate product output equals 1 kg of the reference flow

Field	Value
Reference amount	1 kg
Reference product flow	Bars and rods of high-speed steel
Reference flow property	Mass 93a60a56-a3c8-11da-a746-0800200b9a66
Reference unit group	Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
Reference unit	kg
Required qualifiers	high-speed-steel grade and applicable grade specification; straight bar or rod/coil form; nominal dimensions and dimensional tolerance; hot-working technology; heat-treatment condition; surface condition; billet source and billet production route; production site and geography; reference period; net-mass and packaging exclusion

When constructing a foreground data package, every required qualifier shall be declared in dataset metadata, process notes, the reference-flow comment, the product description or an equivalent field. The missing Tiangong reference-product UUID remains an explicit review issue; it shall not be replaced by a neighboring alloy, silico-manganese, non-alloy or flat-steel flow.

4. Measurement and Unit Rules

rule_id	Applies to	Required property	Required unit	Rule
reference_mass	Reference product and steel-bearing product or waste rows	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Use net dry mass at the stated delivery condition; exclude pallets, straps, wrapping and other packaging. Preserve lot-level weighing records and normalize to 1 kg conforming product.
gas_volume_basis	Natural gas and industrial oxygen	Volume 93a60a56-a3c8-22da-a746-0800200c9a66	m3	State metering temperature, pressure and wet/dry basis. Convert supplier or meter volumes to one declared reference condition before aggregation; do not mix normal, standard and actual cubic metres without conversion.
electricity_energy_basis	Purchased electricity	Energy	MJ	Preserve the metered electrical-energy basis and convert kWh to MJ using 1 kWh = 3.6 MJ. Declare voltage level, supplier or grid mix, geography and whether on-site generation is included.
water_mass_basis	Process water	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Record net make-up process water crossing the foreground boundary. If metered by volume, convert with a measured or documented density and retain the conversion basis; separately disclose recycled internal water.
sodium_hydroxide_active_mass	Sodium hydroxide used in alkaline cleaning	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Report active NaOH mass. For purchased solution, calculate active mass from delivered solution mass and lot-specific concentration; water in the solution shall not be double-counted as process-water make-up.

5. System Boundary

rule_id	Applies to	Rule	source_ids
sb_foreground_start_end	Billet-to-mill-gate foreground system	Start when a grade-identified high-speed-steel billet crosses the producing-site boundary. End when conforming bars or rods are weighed at the mill gate after all producer-applied conditioning. Include reheating, hot working, cooling, internal handling, applicable heat treatment and surface conditioning, utilities, separated wastes and direct emissions.	eu-2022-2110-ferrous-metals-processing; worldsteel-lci-methodology-2017
sb_upstream_billet	Received high-speed-steel billet	Primary steelmaking, alloying, refining and casting are represented by an upstream billet dataset with compatible grade, route, geography, period and recycled-content method; do not reconstruct those burdens from a generic non-alloy billet.	worldsteel-lci-methodology-2017
sb_route_conditionals	Route-conditioned operations	Include oxygen enrichment only when supplied industrial oxygen is used, alkaline cleaning only when performed, and heat treatment or surface finishing only when applied to the reference product. Mark an atomic row not applicable only from production records; do not average absent routes into a zero quantity.	eu-2022-2110-ferrous-metals-processing
sb_excluded_downstream	Scope exclusions	Exclude packaging, outbound customer transport, customer machining, tool manufacture, use and end-of-life from this foreground dataset. If a study adds one of these stages, report it as a separate process without changing this reference flow.	worldsteel-lci-methodology-2017

Boundary Abstraction

Field	Value
declared_starting_condition	Grade-identified high-speed-steel billet received at the producing site, before reheating for bar or rod hot working
starting_condition_role	Upstream product input and foreground conversion starting point
product_classification_scope	CPC 3.0 code 41271 is classification context; canonical identity remains high-speed-steel bars and rods at the declared mill-gate delivery condition
recursive_input_rule	If off-site bars or rods of the same canonical category are used as feedstock, record their purchased mass as a separate upstream product input and disclose the reuse or rerolling route; do not recursively expand this PCR inside the same foreground process
upstream_dataset_requirement	Use an upstream high-speed-steel billet dataset compatible with declared grade, steelmaking and casting route, geography, time period, recycled-content or end-of-life allocation convention and delivery condition
disclosure	Declare billet grade and source, hot-working technology, included conditioning steps, product form and dimensions, site and geography, reference period, energy and water supply, internal recycling, exported recovered materials, waste treatment and direct-emission measurement basis

6. Process Inventory Structure

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
billet_to_bar_rod	Billet reheating, hot working and mill-gate finishing	required	Always required; individual oxygen, alkaline-cleaning, heat-treatment and finishing exchanges apply only when supported by production records	Foreground conversion of high-speed-steel billet into conforming bar or rod	1 kg conforming mill-gate high-speed-steel bar or rod

Process: Billet reheating, hot working and mill-gate finishing (billet_to_bar_rod)

This aggregated foreground process represents the actual site route from received high-speed-steel billet through hot working and all producer-applied finishing. Route-conditioned rows remain atomic and are included only when the stated operation occurs.

Inputs

Product flows

Grade-identified high-speed-steel billet (dr_hss_billet)

The billet is the steel-bearing starting product for the foreground conversion. Record only billet mass that crosses the foreground boundary for the declared grade and production lot.

• Selected flow: High-speed steel billet
• Flow property / unit: Mass / kg
• Amount rule: Weighed or inventory-reconciled billet charged to the production lot
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg conforming high-speed-steel bar or rod output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_material_mass_balance
• Sources: worldsteel-lci-methodology-2017

Natural gas for billet reheating or producer-applied heat treatment (dr_natural_gas)

Record gaseous natural gas delivered to burners that serve the foreground process. Do not include upstream gas-supply emissions as direct foreground emissions.

• Selected flow: natural gas in the gaseous state 4f19ca0e-7b3b-11dd-ad8b-0800200c9a66
• Flow property / unit: Volume / m3
• Amount rule: Metered natural gas allocated to the declared product lot from furnace-level or justified site-level records
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg conforming high-speed-steel bar or rod output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_gas_metering
• Sources: eu-2022-2110-ferrous-metals-processing; worldsteel-lci-methodology-2017

Purchased electricity for rolling, drives, pumps and finishing (dr_electricity)

Record delivered electrical energy consumed by the foreground equipment. Use the actual voltage level and supplier or grid geography rather than a cable or voltage-transformation service flow.

• Selected flow: Medium-voltage alternating-current electricity
• Flow property / unit: Energy / MJ
• Amount rule: Metered electricity for the foreground process, or a documented allocation from site meters when submetering is unavailable
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg conforming high-speed-steel bar or rod output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_energy_metering
• Sources: worldsteel-lci-methodology-2017

Industrial oxygen for oxygen-enriched combustion (dr_industrial_oxygen)

Include this row only when purchased or on-site-generated industrial oxygen crosses the selected furnace boundary for oxygen-enriched combustion. Ambient combustion air is not this product flow.

• Selected flow: Industrial oxygen bd4b0f96-2090-4806-a648-335ab20ff401
• Flow property / unit: Volume / m3
• Amount rule: Metered oxygen supplied to applicable foreground burners; otherwise mark the row not applicable with supporting furnace records
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg conforming high-speed-steel bar or rod output when oxygen enrichment is used
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_gas_metering
• Sources: worldsteel-lci-methodology-2017

Process water make-up for descaling and cooling (dr_process_water)

Record net make-up water delivered to the foreground descaling and cooling circuits. Internal recirculation is disclosed but is not counted repeatedly as an input.

• Selected flow: Process Water 94a04f7e-2d5c-41f0-b182-d54a3b373a02
• Flow property / unit: Mass / kg
• Amount rule: Metered make-up water minus documented transfers to processes outside this foreground boundary
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg conforming high-speed-steel bar or rod output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_water_metering
• Sources: eu-2022-2110-ferrous-metals-processing; worldsteel-lci-methodology-2017

Sodium hydroxide for route-applied alkaline cleaning (dr_sodium_hydroxide)

Include sodium hydroxide only when the declared product route uses a NaOH-based alkaline-cleaning bath. Record active chemical mass and separately characterize the solution water through the water records.

• Selected flow: Sodium hydroxide e0abcced-0611-4c24-9290-5a2c5a0c4169
• Flow property / unit: Mass / kg active NaOH
• Amount rule: Delivered solution mass multiplied by lot-specific NaOH mass fraction, adjusted for opening and closing bath inventory
• Value mode: Calculated value (calculated_value)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg conforming high-speed-steel bar or rod output when NaOH cleaning is used
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_material_mass_balance
• Sources: eu-2022-2110-ferrous-metals-processing

Waste flows

Elementary flows

Outputs

Product flows

Conforming high-speed-steel bars and rods (pr_hss_bars_rods)

This is the reference product output after every producer-applied operation in the declared delivery condition. Keep the UUID empty until an exact public state-100 flow for this product category is verified.

• Selected flow: Bars and rods of high-speed steel
• Flow property / unit: Mass / kg
• Amount rule: 1 kg reference product output; retain the measured lot output before normalization
• Value mode: Fixed value (fixed_value)
• Specificity: Generic (generic)
• Normalization basis: 1 kg conforming mill-gate product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Method formula (method_formula)
• Sources: un-cpc-3-0-structure-2025

Waste flows

Rolling mill scale separated from the product and water circuit (wr_mill_scale)

Record mill scale removed during reheating, hot working, descaling or scale-bearing water treatment. Declare whether it is internally recycled, exported for recovery or sent to waste treatment.

• Selected flow: Mill scale 763bdad1-b443-428a-89b6-371a6807fc6c
• Flow property / unit: Mass / kg
• Amount rule: Weighed separated mill scale, adjusted for opening and closing storage inventory and assigned to the declared product lot
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg conforming high-speed-steel bar or rod output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_material_mass_balance
• Sources: eu-2022-2110-ferrous-metals-processing; worldsteel-lci-methodology-2017

Spent alkaline cleaning liquor (wr_waste_alkaline_liquor)

Include this waste only when a NaOH-based cleaning bath is discharged from the foreground route. Report wet waste mass and retain composition and treatment records.

• Selected flow: Waste Alkaline Liquor ce738ef0-a711-4650-a38b-34479efd7559
• Flow property / unit: Mass / kg wet liquor
• Amount rule: Weighed or volume-and-density-calculated liquor sent to on-site or off-site treatment, adjusted for bath inventory changes
• Value mode: Calculated value (calculated_value)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg conforming high-speed-steel bar or rod output when alkaline cleaning is used
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_material_mass_balance
• Sources: eu-2022-2110-ferrous-metals-processing

Elementary flows

Direct fossil carbon dioxide from foreground fuel combustion (er_carbon_dioxide_fossil)

Record fossil carbon dioxide emitted directly from natural-gas combustion in foreground furnaces. Exclude upstream electricity-generation emissions and biogenic carbon dioxide from this row.

• Selected flow: carbon dioxide (fossil) 08a91e70-3ddc-11dd-923d-0050c2490048
• Flow property / unit: Mass / kg
• Amount rule: Site-measured direct fossil CO2 or a separately documented fuel-carbon calculation reconciled to the natural-gas record
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg conforming high-speed-steel bar or rod output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_direct_air_emissions
• Sources: worldsteel-lci-methodology-2017

7. Allocation and Co-product Handling

rule_id	Applies to	Rule	source_ids
al_subdivision_first	Shared equipment and site utilities	Avoid allocation by submetering or subdividing reheating, hot-working, treatment and finishing operations. If shared-meter allocation is unavoidable, use a documented causal driver such as furnace occupancy, machine time or processed mass and test sensitivity for materially different grades.	worldsteel-lci-methodology-2017
al_internal_recirculation	Internally returned steel or scale-bearing material	Record internal recovery as output from the generating operation and input to the receiving operation, then report the net boundary-crossing balance; do not claim an external avoided burden for internal circulation.	worldsteel-lci-methodology-2017
al_exported_scale	Mill scale exported for recovery	Treat exported mill scale as a co-product only when a documented market use and substitution function exist. Apply transparent system expansion for the identified substituted product; otherwise retain it as waste and include its treatment without an avoided-product credit.	worldsteel-lci-methodology-2017
al_recycling_consistency	Upstream billet and downstream study	Preserve and disclose the billet dataset's recycling convention. Do not add a second recycled-content burden or end-of-life credit inside this billet-to-gate foreground process.	worldsteel-lci-methodology-2017

8. Foreground Data Collection, Calculation, and Quality Rules

Data Collection Protocols

protocol_id	process_id	flow_role	record_type	raw_fields	collection_method	unit	frequency	temporal_coverage	site_scope	aggregation_rule	quality_evidence
cp_material_mass_balance	billet_to_bar_rod	Billet, product, sodium hydroxide, mill scale and spent alkaline liquor	Calibrated scale tickets, batch sheets, purchase records, bath records and storage inventory	lot_id; grade; input_mass_kg; output_mass_kg; solution_mass_kg; concentration_mass_fraction; waste_mass_kg; opening_inventory_kg; closing_inventory_kg	Reconcile physical receipts, issues, returns, product weights and waste dispatches by grade and lot	kg	Each lot; aggregate monthly and annually	Prefer one representative year; justify any shorter period and cover all declared operating modes	Producing site and named foreground line	Sum boundary-crossing quantities plus closing inventory minus opening inventory, assign only documented shared quantities, then divide by conforming product mass	Scale calibration; stock reconciliation; certificates; bath analyses; waste transfer records; exception log
cp_gas_metering	billet_to_bar_rod	Natural gas and industrial oxygen	Calibrated furnace or supply meters and supplier statements	timestamp; meter_id; gas_identity; volume; temperature; pressure; wet_dry_basis; product_lot; furnace_status	Read meters at lot or campaign boundaries and reconcile to supplier totals; normalize to one declared volume reference condition	m3	Continuous or each shift; reconcile monthly	Same representative period as product output and all applicable furnace modes	Producing site and applicable furnaces	Sum normalized gas volume assigned by measured furnace operation or documented causal allocation, then divide by conforming product mass	Meter calibration; supplier reconciliation; furnace log; allocation rationale
cp_energy_metering	billet_to_bar_rod	Purchased electricity	Revenue, submeter or equipment-meter records	timestamp; meter_id; kWh; voltage_level; supplier_or_grid; product_lot; equipment_status	Prefer process submeters; otherwise reconcile site purchases and allocate with documented equipment load, time or processed mass	kWh and MJ	Continuous or each shift; reconcile monthly	Same representative period as product output and all declared route states	Producing site and foreground equipment	Subtract documented exports and out-of-scope uses, convert kWh to MJ, allocate only residual shared use, then divide by conforming product mass	Meter calibration; invoice reconciliation; load study; grid or supplier evidence
cp_water_metering	billet_to_bar_rod	Process-water make-up	Calibrated make-up meters, tank records and water-balance records	timestamp; meter_id; source; volume_or_mass; temperature; density; recycle_flow; discharge_flow; product_lot	Meter net water crossing the foreground boundary and reconcile make-up, recycle, evaporation and discharge	kg	Continuous or daily; reconcile monthly	Same representative period as product output, including shutdown and maintenance effects where material	Producing site and descaling or cooling circuits	Convert volume using documented density when needed, subtract out-of-scope transfers, and divide net make-up by conforming product mass	Meter calibration; annual water balance; maintenance log; reconciliation variance
cp_direct_air_emissions	billet_to_bar_rod	Direct fossil carbon dioxide	Stack monitoring, regulated emissions report or fuel-carbon inventory	source_id; timestamp; fossil_CO2_kg; measurement_method; natural_gas_volume; carbon_factor; oxidation_factor; product_lot	Use source-specific monitoring where available; otherwise retain a transparent fuel-carbon calculation and reconcile it to the gas meter	kg	Continuous, campaign or reporting-period basis; reconcile annually	Same representative period and foreground combustion sources as the natural-gas record	Producing site and foreground furnaces only	Sum direct fossil CO2 from included sources, exclude upstream electricity and off-site supply emissions, then divide by conforming product mass	Monitoring QA/QC; calculation workbook; fuel certificate; regulatory or inventory reconciliation

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
calc_normalize_mass	All mass-based inventory rows	Normalized amount = attributed boundary-crossing row mass / conforming reference-product mass	attributed row mass; conforming product mass	kg per 1 kg reference product	worldsteel-lci-methodology-2017
calc_active_naoh	dr_sodium_hydroxide	Active NaOH mass = delivered solution mass × measured NaOH mass fraction + opening active inventory − closing active inventory	solution mass; concentration; opening bath inventory; closing bath inventory	kg active NaOH per 1 kg reference product
calc_waste_liquor_mass	wr_waste_alkaline_liquor	Wet liquor mass = measured mass, or discharged volume × measured density; reconcile the result with bath make-up and inventory change	waste mass or volume; density; opening and closing bath inventory	kg wet liquor per 1 kg reference product	eu-2022-2110-ferrous-metals-processing
calc_energy_conversion	dr_electricity	Electrical energy in MJ = metered kWh × 3.6	metered electricity in kWh	MJ per 1 kg reference product
calc_metallic_balance	Steel-bearing input and outputs	Reconcile high-speed-steel billet mass with conforming product, retained work in process, internal return, mill scale and other separately identified steel-bearing outputs; investigate unexplained loss rather than assigning it to a generic waste flow	billet; product; work in process; internal return; mill scale; other identified steel-bearing outputs	steel-bearing mass-balance closure and variance	worldsteel-lci-methodology-2017

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
dq_product_identity	Reference product and billet	Retain grade certificates, order specifications and lot traceability that demonstrate high-speed-steel identity and distinguish straight bar from rod/coil, dimensions, heat-treatment state and surface condition.	Mill certificate; purchase specification; product order; lot genealogy
dq_technology_geography	Foreground and upstream data	Declare the actual hot-working and finishing technology and production geography. Use geographically and technologically representative upstream billet, electricity, gas, oxygen, water and treatment datasets.	Process map; supplier records; dataset metadata; representativeness review
dq_temporal_coverage	Foreground records	Use a representative year where practical. If less than six months is used, justify it and demonstrate coverage of grade mix, campaign changes, shutdowns and all route-conditioned operations.	Dated records; production schedule; coverage assessment; exception log
dq_completeness	Inventory	Reconcile meters and material records to the same site, period and product denominator. Separately report each included atomic exchange and document exclusions; do not hide unresolved loss in a generic waste, utility or emission row.	Reconciliation workbook; mass and energy balances; exclusion register; meter map
dq_conditional_routes	Oxygen enrichment and alkaline cleaning	A conditional row may be marked not applicable only when furnace, bath and production records demonstrate that the operation did not occur for the represented product and period.	Furnace specification and logs; bath records; routing sheets

9. Validation Rules

rule_id	Applies to	Rule	source_ids
val_identity	Reference product	Fail conformance if grade evidence does not establish high-speed steel, if product form is not bar or rod, or if the reference flow lacks grade, form, dimensions, delivery condition, site, period or net-mass qualifiers.	un-cpc-3-0-structure-2025
val_reference_amount	Reference flow	Verify that the normalized conforming product output is exactly 1 kg and that packaging mass is excluded.
val_boundary	Foreground system	Verify that the dataset begins with a grade-compatible high-speed-steel billet, includes every actual producer-applied route step and direct foreground exchange, and does not double-count upstream billet, electricity-supply or downstream fabrication burdens.	worldsteel-lci-methodology-2017
val_mass_balance	Steel-bearing inventory	Require a documented steel-bearing mass balance and investigation of unexplained variance; mill scale, internal returns, work in process and any other real steel-bearing output shall be recorded separately.	worldsteel-lci-methodology-2017
val_meter_reconciliation	Energy, gases and water	Verify meter calibration, common temporal coverage, supplier or site reconciliation, conversion factors and the allocation of shared use to the declared product.	eu-2022-2110-ferrous-metals-processing; worldsteel-lci-methodology-2017
val_conditional_exchange	Oxygen, sodium hydroxide and waste alkaline liquor	Verify that each conditional exchange is included only when its specific operation occurred and that input, inventory-change and waste records are mutually consistent.	eu-2022-2110-ferrous-metals-processing
val_uuid_integrity	UUID-bearing rows	Verify every UUID by direct public state-100 read for semantic identity, flow type, property and unit group. Reject proxies and keep the three declared unresolved UUID rows empty until exact records are confirmed.

10. Published Dataset Profile

Field	Value
dataset_role	Candidate foreground production dataset that may become a secondary_dataset or background_dataset after independent methodology and translation review
downstream_use	Cradle-to-gate models for high-speed-steel bars or rods and downstream products that consume the declared grade, form and delivery condition
allowed_use	Product systems whose billet input, hot-working route, finishing state, geography, period, allocation convention and required qualifiers are compatible with this dataset
excluded_use	Generic non-alloy or ordinary alloy steel; silico-manganese steel; wire; flat products; finished tools; a different grade or delivery condition without documented representativeness; use as a cradle-to-gate dataset when the upstream billet is absent
required_metadata	canonical PCR id; product grade and specification; straight bar or rod/coil form; dimensions and tolerances; delivery and surface condition; upstream billet dataset and recycling convention; hot-working and finishing route; site and geography; reference period; data owners; allocation and substitution choices; UUID resolution status
required_quality_disclosure	Record coverage and completeness; calibration and reconciliation results; mass-balance variance; submetering and shared-use allocation; upstream-data representativeness; conditional-route applicability; internal recycling; mill-scale destination; waste treatment; direct-emission method; unresolved UUIDs and range evidence needs
update_trigger	New product grade family or forming route; changed billet source, furnace fuel, electricity supply, oxygen enrichment, water circuit, cleaning chemistry, waste treatment or allocation convention; material equipment change; expired representativeness period; resolution of a UUID or range-evidence need

11. Data Sources

Source id	Type	Reference	Used for
un-cpc-3-0-structure-2025	Official guidance (official_guidance)	United Nations Statistics Division, Central Product Classification Version 3.0 Structure, 30 June 2025, code 41271, https://unstats.un.org/unsd/classifications/Econ/Download/In%20Text/CPC_Ver_3.0_Structure_30Jun2025.csv (retrieved 2026-09-04)	Official classification identity and distinction from neighboring steel-product subclasses
eu-2022-2110-ferrous-metals-processing	Official guidance (official_guidance)	Commission Implementing Decision (EU) 2022/2110 of 11 October 2022 establishing BAT conclusions for the ferrous metals processing industry, ELI http://data.europa.eu/eli/dec_impl/2022/2110/oj (verified 2026-09-04)	Hot-rolling boundary, bar and rod rolling, route-conditioned surface treatment, water accounting, material efficiency and validation
worldsteel-lci-methodology-2017	Handbook (handbook)	World Steel Association, Life Cycle Inventory Methodology Report, 2017, https://worldsteel.org/wp-content/uploads/Life-cycle-inventory-methodology-report.pdf (verified 2026-09-04)	Steel-product system boundary, bar and rod process chain, technology/geography/time representativeness, inventory completeness, recycling and co-product treatment