EN 10025-6:2019/prA1

Overview

EN 10025-6:2019/prA1 - Hot rolled products of structural steels, Part 6 (amendment A1) - specifies the technical delivery conditions for hot‑rolled flat products of high yield strength structural steels supplied in the quenched and tempered condition. The standard covers alloy special, heat‑treatable steels with specified minimum yield strengths from 460 MPa to 960 MPa and a nominal thickness range from 3 mm upward (see limits per grade below). Chemical composition and mechanical property grades are provided in the standard’s tables.

Key topics and requirements

• Scope and product type
  • Applies to hot‑rolled flat products (minimum nominal thickness 3 mm) of high yield strength structural steels in the quenched and tempered condition.
  • Grades covered include S460, S500, S550, S620, S690, S890 and S960 with maximum nominal thicknesses of 200 mm for S460–S690 and 125 mm for S890 and S960.
• Composition and properties
  • Chemical compositions are defined in Tables 1–3; mechanical properties and guaranteed minimums are in Tables 4–6 (as published in the full standard).
• Delivery and testing
  • Technical delivery conditions include requirements for heat treatment, surface condition, marking, certification and inspection.
  • Amendment prA1 modifies clause 9.2.3.2 (preparation of tensile test pieces): the requirement of EN ISO 6892‑1 applies, and for flat products either the full product thickness or half the product thickness can be used, but one product surface shall be retained when preparing tensile specimens.
• Quality control
  • Specifies sampling, test-piece preparation and mechanical testing regimes that manufacturers and testing laboratories must follow to demonstrate conformity.

Applications and who uses this standard

• Commonly used in structural engineering and heavy fabrication where high‑strength quenched and tempered steels are required:
  • Bridges, cranes, heavy machinery, offshore structures, storage tanks and demanding welded structures.
• Primary users:
  • Steel producers and rolling mills (production and certification)
  • Structural engineers and specifiers (material selection and design)
  • Fabricators and welders (processing and welding procedures)
  • Procurement officers and QA/QC labs (acceptance testing and inspection)
  • Notified bodies and certification authorities

Related standards

• EN 10025 series (Parts 1–5) - general and other product families of structural steels
• EN ISO 6892‑1 - Tensile testing of metallic materials (referenced by the amendment)
• National adoption documents (CEN members) and complementary standards for welding, corrosion and testing practices

EN 10025‑6:2019/prA1 is essential when specifying or supplying hot rolled, quenched and tempered high‑yield structural steels, ensuring consistent delivery conditions, traceability and reliable mechanical performance.