Angles, shapes and sections, of alloy steel

1. Scope and Applicability

This PCR covers solid stainless-steel and other alloy-steel angles, shapes and sections supplied as unprepared mill products at the dispatch gate, including hot-formed products and products receiving a declared cold-forming or cold-finishing stage. The foreground boundary begins with semi-finished alloy-steel feedstock or, for a stand-alone cold-finishing site, a received hot-formed section.

It excludes iron or non-alloy-steel sections, welded sections, sheet piling, track material, hollow profiles and tubes, wire, bars and rods, and sections prepared for a specific structure. Upstream steel production, downstream transport, fabrication, installation, use and end-of-life require separate linked datasets.

2. Product Category Identity

Field	Value
canonical_pcr_id	pcr.metal-products-machinery-and-equipment.basic-metals.angles-shapes-and-sections-of-alloy-steel
classification_refs	CPC 3.0 41266, “Angles, shapes and sections, of alloy steel” (unsd-cpc-3-0-structure-2025)
covered_products	Solid stainless-steel or other alloy-steel angles, shapes and sections supplied as unprepared mill products; hot-formed and declared cold-formed or cold-finished variants
excluded_products	Non-alloy, welded, hollow, track, wire, bar, rod and structure-prepared products
representative_product	One declared alloy-steel grade and section designation in its dispatch condition
production_route	Hot rolling, hot drawing or hot extrusion, with cold forming or cold finishing included only when performed; declare the actual route
market_state	Inspected saleable solid section at the producing mill dispatch gate, with declared surface and heat-treatment condition

3. Reference Flow

Field	Value
What	Provision of an alloy-steel angle, shape or section meeting the declared grade, geometry and dispatch condition
How much	1,000 kg net saleable product at the producing mill dispatch gate
How well	Conforms to the declared alloy family, grade/composition specification, section designation, dimensional tolerances, mechanical-property condition, heat treatment and surface condition
How long or cycle	One production lot through dispatch; service life is not represented
reference_flow_link	Use hot_formed_alloy_steel_section_output when no cold-finishing stage follows; otherwise use reference_product_cold_route

Field	Value
Reference amount	1,000 kg net saleable alloy-steel section
Reference product flow	Angles, shapes and sections, of alloy 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	alloy family and grade; composition or product standard; section designation and dimensions; forming route; heat-treatment condition; surface condition; producing site and geography; production period; recycled-content accounting method; dispatch gate

4. Measurement and Unit Rules

rule_id	Applies to	Required property	Required unit	Rule
reference_mass	Reference product	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Use certified net saleable mass, excluding reusable fixtures and external packaging, and normalize the applicable final product output to 1,000 kg.
steel_mass_consistency	Steel-bearing product and waste flows	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Record feedstock, product, scrap and scale on a consistent mass basis; disclose material moisture or adherent oil.
electricity_energy	Alternating-current inputs	Net calorific value 93a60a56-a3c8-11da-a746-0800200c9a66	MJ	Preserve metered electricity in its original unit and convert with a disclosed exact conversion; do not combine electricity and fuel energy.
gas_reference_volume	Gaseous natural gas	Volume 93a60a56-a3c8-22da-a746-0800200c9a66	m3	Record reference temperature, pressure and dryness with the metered volume.
process_water_mass	Externally supplied process water	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Record boundary-crossing make-up water by mass; when only volume is metered, convert using documented density at the metered temperature and pressure.
wastewater_volume	Hot-rolling wastewater	Volume	m3	Meter wastewater crossing the boundary; report internal recirculation separately.

5. System Boundary

rule_id	Applies to	Rule	source_ids
boundary_route_gate	Foreground system boundary	Include all on-site operations from the declared alloy-steel feedstock through surface rectification, reheating, descaling, forming, cooling, straightening, cutting, cold finishing, inspection and dispatch when each operation is performed.	eu-jrc-fmp-bref-2022
boundary_upstream_link	Upstream steel supply	Represent billet, bloom or received hot-formed section with a representative upstream dataset; do not absorb upstream steelmaking into unreported foreground assumptions.	eu-jrc-fmp-bref-2022
boundary_route_disclosure	Conditional process selection	Include hot_section_forming and cold_section_finishing only when their stated inclusion conditions apply, and declare whether they are linked on-site or through an upstream dataset.	unsd-cpc-3-0-structure-2025, eu-jrc-fmp-bref-2022
boundary_completeness	Foreground inventory	Collect company-specific data and include all environmentally relevant material, energy, waste and elementary flows crossing the boundary; disclose exclusions and significance.	ec-pef-method-2021

Boundary Abstraction

Field	Value
declared_starting_condition	Alloy-steel billet or bloom received by an integrated hot-forming mill; hot-formed alloy-steel section received by a stand-alone cold-finishing site
starting_condition_role	Product input whose upstream production is represented by a linked dataset
product_classification_scope	Solid alloy-steel angles, shapes and sections corresponding to CPC 3.0 41266, excluding welded, hollow, non-alloy and structure-prepared products
recursive_input_rule	Record a received same-category section as a product input with its own upstream dataset; do not recursively reproduce an unbounded foreground chain
upstream_dataset_requirement	Declare alloy family/grade, route, geography, recycled-content accounting, product state and delivery boundary without overlap with foreground operations
disclosure	Declare feedstock form, grade, mass basis, supplier geography, hot-charge condition, site configuration, included stages and final dispatch condition

6. Process Inventory Structure

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
hot_section_forming	Hot section forming and finishing	conditional	Include when hot rolling, hot drawing or hot extrusion occurs inside the foreground boundary; may precede on-site cold finishing.	Convert billet or bloom to hot-formed section and record site inputs, wastes and direct emissions.	kg hot-formed alloy-steel section output
cold_section_finishing	Cold section forming and finishing	conditional	Include when a hot-formed section is cold-formed, cold-finished or otherwise further worked before dispatch.	Convert hot-formed section to the final cold-finished reference product.	kg cold-finished alloy-steel section output

At least one process shall be included. If both are included, link the hot output to the cold input without duplicating burdens.

Process: Hot section forming and finishing (hot_section_forming)

Inputs

Product flows

Alloy-steel billet input (alloy_steel_billet_input)

Record only when billet crosses the foreground boundary.

• Selected flow: Alloy-steel billet
• Flow property / unit: Mass / kg
• Amount rule: measured net billet mass charged to the production lot
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1,000 kg applicable final reference-product output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_steel_mass_records
• Sources: eu-jrc-fmp-bref-2022

Alloy-steel bloom input (alloy_steel_bloom_input)

Record only when bloom crosses the foreground boundary.

• Selected flow: Alloy-steel bloom
• Flow property / unit: Mass / kg
• Amount rule: measured net bloom mass charged to the production lot
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1,000 kg applicable final reference-product output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_steel_mass_records
• Sources: eu-jrc-fmp-bref-2022

Natural gas for reheating (natural_gas_input)

Record only when gaseous natural gas is combusted inside the boundary.

• Selected flow: natural gas in the gaseous state 4f19ca0e-7b3b-11dd-ad8b-0800200c9a66
• Flow property / unit: Volume / m3
• Amount rule: supplier-metered volume assigned to the production lot
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1,000 kg applicable final reference-product output at declared reference-volume conditions
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_natural_gas_records
• Sources: eu-jrc-fmp-bref-2022

Alternating-current electricity for hot forming (hot_forming_electricity)

Record electricity delivered to forming, reheating auxiliaries, descaling, cooling and finishing equipment.

• Selected flow: Alternating current 455f0ef5-6118-4f2b-a3f5-1f75e0afe3ca
• Flow property / unit: Net calorific value / MJ
• Amount rule: metered electricity assigned to hot forming and finishing
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1,000 kg applicable final reference-product output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_electricity_records
• Sources: eu-jrc-fmp-bref-2022

Process water (process_water_input)

Record externally supplied make-up water for descaling, cooling or finishing; exclude internal recirculation.

• Selected flow: Process Water 94a04f7e-2d5c-41f0-b182-d54a3b373a02
• Flow property / unit: Mass / kg
• Amount rule: boundary-measured make-up-water mass assigned to the production lot; when only volume is metered, convert using documented density at the metered temperature and pressure
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1,000 kg applicable final reference-product output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_water_records
• Sources: eu-jrc-fmp-bref-2022

Hot-rolling lubricant (hot_rolling_lubricant)

Record the declared lubricant only when used; do not combine it with hydraulic fluids or cleaning agents.

• Selected flow: Hot rolling oil b6d54639-2da8-49b3-89d2-e14324bb14c8
• Flow property / unit: Mass / kg
• Amount rule: issued mass minus documented reusable returns
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1,000 kg applicable final reference-product output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_lubricant_records
• Sources:

Waste flows

Elementary flows

Outputs

Product flows

Hot-formed alloy-steel section output (hot_formed_alloy_steel_section_output)

This is the reference product if no cold stage follows; otherwise it is the linked intermediate.

• Selected flow: Angles, shapes and sections, of alloy steel
• Flow property / unit: Mass / kg
• Amount rule: measured conforming output, normalized to 1,000 kg when final
• Value mode: Calculated value (calculated_value)
• Specificity: Product-specific (product_specific)
• Normalization basis: applicable final reference-product output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_product_and_scrap_mass
• Sources: unsd-cpc-3-0-structure-2025

Waste flows

Mill scale (mill_scale_waste)

Record segregated oxide scale at its declared moisture and oil condition.

• Selected flow: Alloy-steel mill scale
• Flow property / unit: Mass / kg
• Amount rule: measured transferred mass with documented condition correction
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1,000 kg applicable final reference-product output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_waste_transfer_records
• Sources: eu-jrc-fmp-bref-2022

Alloy-steel offcut scrap from hot forming (hot_process_alloy_steel_scrap)

Record segregated cropping, cutting and reject scrap leaving for recycling or treatment.

• Selected flow: Alloy-steel offcut scrap
• Flow property / unit: Mass / kg
• Amount rule: measured scrap mass leaving hot forming
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1,000 kg applicable final reference-product output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_product_and_scrap_mass
• Sources:

Oil- and scale-bearing hot-rolling wastewater (hot_rolling_wastewater)

Record only wastewater crossing the boundary after internal reuse.

• Selected flow: Oil- and scale-bearing hot-rolling wastewater
• Flow property / unit: Volume / m3
• Amount rule: boundary-metered wastewater volume
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1,000 kg applicable final reference-product output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_wastewater_records
• Sources: eu-jrc-fmp-bref-2022

Elementary flows

Fossil carbon dioxide to air (fossil_co2_air)

Record monitored or site-calculated fossil carbon dioxide from natural-gas combustion.

• Selected flow: carbon dioxide (fossil) 08a91e70-3ddc-11dd-923d-0050c2490048
• Flow property / unit: Mass / kg
• Amount rule: direct measurement or documented site calculation from fuel quantity and carbon/oxidation data
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1,000 kg applicable final reference-product output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_stack_emission_records
• Sources: eu-jrc-fmp-bref-2022

Nitrogen oxides to air (nitrogen_oxides_air)

Record monitored nitrogen oxides using the facility's declared species basis.

• Selected flow: Nitrogen oxides to air, unspecified
• Flow property / unit: Mass / kg
• Amount rule: monitored or source-tested mass assigned to the production lot
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1,000 kg applicable final reference-product output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_stack_emission_records
• Sources: eu-jrc-fmp-bref-2022

Particulate matter to air (particulate_matter_air)

Record monitored particulate matter on the facility's declared particle-size basis.

• Selected flow: Particulate matter to air, unspecified
• Flow property / unit: Mass / kg
• Amount rule: monitored or source-tested mass assigned to the production lot
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1,000 kg applicable final reference-product output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_stack_emission_records
• Sources: eu-jrc-fmp-bref-2022

Process: Cold section forming and finishing (cold_section_finishing)

Inputs

Product flows

Hot-formed alloy-steel section input (hot_formed_alloy_steel_section_input)

Record the hot-formed section entering cold forming or finishing.

• Selected flow: Angles, shapes and sections, of alloy steel
• Flow property / unit: Mass / kg
• Amount rule: measured net input mass
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1,000 kg cold-finished reference-product output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_steel_mass_records
• Sources: unsd-cpc-3-0-structure-2025

Alternating-current electricity for cold finishing (cold_forming_electricity)

Record electricity delivered to cold-forming, straightening, cutting and finishing equipment.

• Selected flow: Alternating current 455f0ef5-6118-4f2b-a3f5-1f75e0afe3ca
• Flow property / unit: Net calorific value / MJ
• Amount rule: metered electricity assigned to cold finishing
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1,000 kg cold-finished reference-product output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_electricity_records
• Sources: ec-pef-method-2021

Cold-forming lubricant (cold_forming_lubricant)

Record the declared lubricant only when used; do not combine it with cleaning chemicals.

• Selected flow: Cold-forming lubricant
• Flow property / unit: Mass / kg
• Amount rule: issued mass minus documented reusable returns
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1,000 kg cold-finished reference-product output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_lubricant_records
• Sources:

Waste flows

Elementary flows

Outputs

Product flows

Cold-finished reference product (reference_product_cold_route)

This is the reference product when cold finishing is included.

• Selected flow: Angles, shapes and sections, of alloy steel
• Flow property / unit: Mass / kg
• Amount rule: measured conforming output normalized to 1,000 kg
• Value mode: Calculated value (calculated_value)
• Specificity: Product-specific (product_specific)
• Normalization basis: 1,000 kg cold-finished reference-product output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_product_and_scrap_mass
• Sources: unsd-cpc-3-0-structure-2025

Waste flows

Alloy-steel offcut scrap from cold finishing (cold_process_alloy_steel_scrap)

Record segregated cutting and reject scrap leaving cold finishing.

• Selected flow: Alloy-steel offcut scrap
• Flow property / unit: Mass / kg
• Amount rule: measured scrap mass leaving cold finishing
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1,000 kg cold-finished reference-product output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_product_and_scrap_mass
• Sources:

Spent cold-forming lubricant (spent_cold_forming_lubricant)

Record transferred spent lubricant as a distinct waste stream.

• Selected flow: Used lubricating oil 55d93375-7f04-4166-b2a2-88ce929051a5
• Flow property / unit: Mass / kg
• Amount rule: measured waste-transfer mass
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1,000 kg cold-finished reference-product output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_waste_transfer_records
• Sources:

Elementary flows

7. Allocation and Co-product Handling

rule_id	Applies to	Rule	source_ids
allocation_subdivision_first	Shared operations	Avoid allocation by sub-metering or subdividing processes and collect data directly attributable to the declared product where practicable.	ec-pef-method-2021
allocation_physical_fallback	Unsubdividable multifunctional processes	If subdivision or system expansion is impracticable, use a documented causal physical relationship; use mass only when it is demonstrated to drive shared inputs and outputs.	ec-pef-method-2021
allocation_scrap_disclosure	Recovered outputs	Record scrap and scale as measured outputs without an avoided-burden credit inside this gate-to-gate dataset; a downstream study may apply and disclose a consistent recycling method.	ec-pef-method-2021

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_steel_mass_records	hot_section_forming; cold_section_finishing	Steel inputs	Weighbridge, charge and stock records	form; grade; heat/lot; gross; tare; net mass; stock change; time	Reconcile receipts, charges and stock by lot.	kg	Each event	At least 12 months or full campaign	Included lines	Sum attributable net mass and normalize to final product.	Calibration, traceability and reconciliation
cp_natural_gas_records	hot_section_forming	Natural gas	Supplier and submeter records	volume; temperature; pressure; dryness; calorific value; allocation	Reconcile calibrated meters with invoices.	m3	Continuous or billing interval	Product period	Included furnaces	Sum corrected attributable volume.	Calibration and invoice reconciliation
cp_electricity_records	both route process ids	Alternating current	Revenue and submeter records	kWh; voltage; supplier; geography; allocation	Reconcile calibrated meters with invoices.	kWh and MJ	Continuous or billing interval	Product period	Production and controls	Sum attributable kWh, convert to MJ and normalize.	Calibration, invoice and meter map
cp_water_records	hot_section_forming	Process water	Boundary meters	source; volume; recirculation; quality; allocation	Meter external make-up water.	m3	Continuous or daily	Product period	Included water circuits	Sum attributable input and reconcile discharge.	Calibration and water balance
cp_lubricant_records	both route process ids	Lubricant	Issue, return and stock records	identity; specification; issued; returned; stock	Reconcile each named product.	kg	Each event	Product period	Included lines	Issued plus stock decrease minus reusable returns.	Batch and stock reconciliation
cp_product_and_scrap_mass	both route process ids	Product and scrap	Certified weights and transfer records	grade; section; lot; product; scrap; stock	Reconcile saleable, transfer and scrap mass.	kg	Each lot	Input period	Included lines	Sum outputs and normalize final product to 1,000 kg.	Calibration, conformity and mass balance
cp_waste_transfer_records	both route process ids	Scale and spent lubricant	Waste transfer records	identity; mass; condition; destination; date	Use measured transfer mass.	kg	Each transfer	Product period	Waste points	Sum each distinct waste without netting credits.	Weighing and receiver confirmation
cp_wastewater_records	hot_section_forming	Hot-rolling wastewater	Discharge records	volume; destination; reuse; sampling period	Meter boundary flow after reuse.	m3	Continuous or event	Product period	Discharge points	Sum attributable boundary volume.	Calibration, water balance and permit records
cp_stack_emission_records	hot_section_forming	CO2, NOx and particulate matter	Monitoring, source tests or site calculations	pollutant; basis; concentration; gas flow; time; fuel/carbon data	Use validated monitoring; calculate CO2 only with documented inputs.	kg	Continuous or test interval	Product period	Included emission points	Integrate mass, assign and normalize.	QA, test and operating records

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
normalize_to_reference_mass	All rows	normalized amount = attributable period amount × 1,000 kg / applicable final net saleable product mass	row amount; final product mass	amount per 1,000 kg	ec-pef-method-2021
steel_mass_reconciliation	Each route	feedstock + opening work-in-process = product + scrap + scale + other declared steel outputs + closing work-in-process; investigate residual	steel masses and stock changes	residual and completeness evidence
electricity_unit_conversion	Electricity	MJ = kWh × 3.6	kWh	MJ
route_linking	Linked routes	Reconcile hot output and cold input after stock change and count upstream burdens once.	hot output; cold input; stock change	linked amount and residual

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
dq_product_identity	Product and steel inputs	Retain alloy family, grade/composition, heat/lot, section designation, dimensions, heat treatment, surface condition and conformance.	Mill and conformity certificates
dq_temporal_scope	Activity data	Use at least 12 consecutive representative months or a full shorter campaign; disclose atypical operation.	Coverage table and operating log
dq_meter_coverage	Energy, water and emissions	Demonstrate complete, non-overlapping meter and emission-point coverage.	Meter map, calibration and reconciliation
dq_mass_balance	Steel-bearing flows	Reconcile feedstock, product, scrap, scale and stock changes; explain residuals.	Signed mass-balance worksheet
dq_upstream_dataset	Steel inputs	Match upstream alloy family, route, recycled-content method, geography and delivery boundary.	Supplier declaration and dataset metadata
dq_completeness	All exchanges	Retain a reason for every excluded exchange and unresolved Tiangong identity.	Completeness checklist and identity register

9. Validation Rules

rule_id	Applies to	Rule	source_ids
validation_identity	Product conformance	Reject missing grade, section, route, condition, site, geography, period or gate metadata, and reject welded, hollow, non-alloy or structure-prepared products.	unsd-cpc-3-0-structure-2025, china-mof-tariff-terminology-2024
validation_reference_mass	Reference flow	Confirm exactly one applicable final output is normalized to 1,000 kg net saleable mass.	ec-pef-method-2021
validation_route_link	Process map	Confirm at least one conditional route applies and linked hot-to-cold product is counted once.	eu-jrc-fmp-bref-2022
validation_inventory_balance	Inventory	Confirm mass reconciliation, meter coverage, waste destinations, emission-point coverage and explanations for residuals or exclusions.	ec-pef-method-2021, eu-jrc-fmp-bref-2022
validation_allocation	Shared operations	Confirm subdivision evidence or a documented causal physical allocation basis.	ec-pef-method-2021

10. Published Dataset Profile

Field	Value
dataset_role	Foreground gate-to-gate production dataset for a declared alloy-steel section and route
downstream_use	secondary_dataset; background_dataset only when upstream datasets are linked and unresolved identities are resolved
allowed_use	Mill-gate modelling with matching grade, route, geography, period and allocation method
excluded_use	Non-alloy, welded, hollow or fabricated products; cradle-to-gate claims without upstream steel datasets; unmodelled construction, use or end-of-life
required_metadata	PCR id; product; grade; standard; section; dimensions; route; heat treatment; surface; site; geography; period; feedstock; upstream dataset ids; allocation; reference flow; flow UUIDs
required_quality_disclosure	Record coverage; temporal representativeness; mass-balance residual; gaps; allocation; upstream representativeness; unresolved identities; exclusions; uncertainty; review status
update_trigger	Material change in grade grouping, route, fuel, equipment, boundary, electricity, upstream steel, allocation, controls, energy, water, yield, waste or emissions

11. Data Sources

Source id	Type	Reference	Used for
unsd-cpc-3-0-structure-2025	Official guidance (official_guidance)	United Nations Statistics Division, CPC Version 3.0 Structure, 30 June 2025, https://unstats.un.org/unsd/classifications/Econ/Download/In%20Text/CPC_Ver_3.0_Structure_30Jun2025.csv	CPC 41266 identity and class context
eu-jrc-fmp-bref-2022	Official guidance (official_guidance)	European Commission Joint Research Centre, Ferrous Metals Processing Industry BREF, adopted December 2022, https://bureau-industrial-transformation.jrc.ec.europa.eu/reference/ferrous-metals-processing-industry	Downstream semi-finished-steel boundary, process decomposition, water, waste and monitored emissions
ec-pef-method-2021	Official guidance (official_guidance)	European Commission, Annex I Product Environmental Footprint Method, Recommendation (EU) 2021/2279, https://environment.ec.europa.eu/system/files/2021-12/Annexes%201%20to%202.pdf	Functional-unit framing, company-specific data, completeness, allocation and quality
china-mof-tariff-terminology-2024	Official guidance (official_guidance)	Ministry of Finance of the People’s Republic of China, 2024年对塞尔维亚实施的协定税率表, 2024, https://gss.mof.gov.cn/gzdt/zhengcefabu/202406/P020240625320768010766.pdf	Chinese terminology for HS 72224000 and 72287090 alloy-steel angles, shapes and sections