{"id":69983,"date":"2026-05-17T17:29:13","date_gmt":"2026-05-17T17:29:13","guid":{"rendered":"https:\/\/evgroupchina.com\/encyclopedia-of-metal\/en-10025\/"},"modified":"2026-05-19T15:32:41","modified_gmt":"2026-05-19T15:32:41","slug":"en-10025","status":"publish","type":"wiki","link":"https:\/\/evgroupchina.com\/en\/encyclopedia-of-metal\/en-10025\/","title":{"rendered":"EN 10025"},"content":{"rendered":"

Technical Overview of the EN 10025:2004 Standard<\/h2>\n

The EN 10025:2004 standard establishes modern European requirements for hot-rolled structural steels. This regulatory framework systematizes chemical composition, mechanical characteristics, and delivery regulations, replacing the outdated EN 10025:1993 edition and its associated standards. Full documentation is available in English, French, and German.<\/p>\n

Evolution of Standardization<\/h2>\n

The European Committee for Standardization (CEN) systematically consolidated disparate national standards into a unified EN 10025 system. In 2004, a major revision was conducted, aiming to bring all structural metal products into compliance with EU Directive 89\/106\/EEC. Today, the standard is divided into six parts covering all types of rolled products, from non-alloy to high-strength quenched steels.<\/p>\n

EN 10025-1:2004 \u2013 General Technical Delivery Conditions<\/h2>\n

The first part defines general technical requirements for hot-rolled structural steels, excluding structural hollow sections. This section serves as the foundation for all subsequent parts, regulating quality control procedures and product acceptance rules.<\/p>\n

EN 10025-2:2004 \u2013 Non-Alloy Structural Steels<\/h2>\n

This part covers technical delivery conditions for non-alloy flat and long products. The standard does not apply to hollow sections (regulated by the EN 10210\/10219 series). The document establishes strict tolerances for chemical composition and mechanical properties, including impact strength for various temperature regimes. Products are supplied primarily in the +N (normalized rolling) condition.<\/p>\n\n\n\n\n\n\n\n\n\n\n
Steel Grade<\/th>\nEN Number<\/th>\nPrevious Designation<\/th>\n<\/tr>\n<\/thead>\n
S235JR<\/td>\n1.0038<\/td>\nS235JR \/ 1.0037; S235JRG1 \/ 1.0036; S235JRG2 \/ 1.0038<\/td>\n<\/tr>\n
S235J0<\/td>\n1.0114<\/td>\nS235J0<\/td>\n<\/tr>\n
S235J2<\/td>\n1.0117<\/td>\nS235J2G3 \/ 1.0116; S235J2G4 \/ 1.0117<\/td>\n<\/tr>\n
S275JR<\/td>\n1.0044<\/td>\nS275JR<\/td>\n<\/tr>\n
S355JR<\/td>\n1.0045<\/td>\nS355JR<\/td>\n<\/tr>\n
S355J2<\/td>\n1.0577<\/td>\nS355J2G3 \/ 1.0570; S355J2G4 \/ 1.0577<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Designation System of EN 10025-2<\/h3>\n
    \n
  • S \u2014 structural steel;<\/li>\n
  • Number (e.g., 235) \u2014 minimum yield strength (Reh) in MPa;<\/li>\n
  • JR\/J0\/J2 \u2014 impact strength indicators at temperatures of +20\u00b0C, 0\u00b0C, and -20\u00b0C, respectively;<\/li>\n
  • K2 \u2014 impact strength of 40 J at -20\u00b0C;<\/li>\n
  • +AR\/+N \u2014 delivery condition (as-rolled or normalized).<\/li>\n<\/ul>\n

    EN 10025-3:2004 \u2013 Normalized Fine-Grain Steels<\/h2>\n

    A specialized standard for weldable fine-grain steels subjected to normalization. It is used in critical structures: bridge construction, pressure vessels, and hydraulic engineering structures.<\/p>\n

    EN 10025-4:2004 \u2013 Thermomechanically Rolled Fine-Grain Steels<\/h2>\n

    Regulates the production of fine-grain steels processed via thermomechanical rolling (TMCP). This method provides a combination of high strength and excellent toughness, which is critical for dynamic loads.<\/p>\n

    EN 10025-5:2004 \u2013 Weather-Resistant Steels<\/h2>\n

    The standard for steels with increased resistance to atmospheric corrosion. Due to alloying elements, a passivating protective layer forms on the metal surface. These are used in bridge construction and architectural metal structures where durability is required without regular painting.<\/p>\n

    EN 10025-6:2004+A1:2009 \u2013 High-Yield Strength Steels<\/h2>\n

    Defines requirements for flat products in the quenched and tempered (Q&T) condition. It provides a minimum yield strength from 460 to 960 MPa, which allows for a significant reduction in the weight of metal structures while maintaining load-bearing capacity.<\/p>\n

    EV Group China specialists are ready to provide detailed technical consultations on choosing steel grades according to the EN 10025 standard for your engineering projects.<\/p>\n","protected":false},"featured_media":0,"template":"","meta":[],"wiki_category":[114],"class_list":["post-69983","wiki","type-wiki","status-publish","hentry","wiki_category-en"],"_links":{"self":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki\/69983","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki\/69983\/revisions"}],"wp:attachment":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/media?parent=69983"}],"wp:term":[{"taxonomy":"wiki_category","embeddable":true,"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki_category?post=69983"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}