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World Steel fabricates with structural steel to the material standard named in the project specification. The grades below are those most often used for steel bridges and pedestrian bridges. Availability of a grade, size and thickness is confirmed with the mill or stockist for each order, and every heat is traceable to its mill certificate.
United States (ASTM)
| Standard | Product | Typical grades |
|---|---|---|
| ASTM A709/A709M (AASHTO M 270) | Structural steel for bridges: plates and shapes | Grade 36, 50, 50S, 50W, HPS 50W, HPS 70W |
| ASTM A36/A36M | Carbon structural steel | A36 |
| ASTM A572/A572M | High-strength low-alloy columbium-vanadium steel | Grade 50, 55 |
| ASTM A992/A992M | Structural shapes | A992 |
| ASTM A588/A588M | Weathering steel | Grades as listed in the standard |
| ASTM A500/A500M, ASTM A1085/A1085M | Cold-formed hollow structural sections | A500 Grade B, C; A1085 |
Europe (EN)
| Standard | Product | Typical grades |
|---|---|---|
| EN 10025-2 | Non-alloy structural steels | S235JR/J0/J2, S275JR/J0/J2, S355JR/J0/J2/K2 |
| EN 10025-3 | Normalized fine grain steels | S355N/NL, S460N/NL |
| EN 10025-4 | Thermomechanical rolled fine grain steels | S355M/ML, S460M/ML |
| EN 10025-5 | Improved atmospheric corrosion resistance | S355J0W, S355J2W, S355K2W |
| EN 10025-6 | High yield strength, quenched and tempered | S460Q/QL, S690Q/QL |
| EN 10210-1, EN 10219-1 | Hot-finished and cold-formed hollow sections | S355J2H (and other grades of the standards) |
| EN 10164 | Through-thickness (Z) properties | Z15, Z25, Z35 |
China (GB/T)
| Standard | Product | Typical grades |
|---|---|---|
| GB/T 714 | Structural steel for bridges | Q345q, Q370q, Q420q (quality grades C to F); weathering grades Q345qNH and higher |
| GB/T 1591 | High-strength low-alloy structural steels | Q355B/C/D, Q390, Q420 |
| GB/T 700 | Carbon structural steels | Q235B/C/D |
| GB/T 4171 | Atmospheric corrosion resisting structural steel | For example Q355NH |
| GB/T 5313 | Through-thickness (Z) properties | Z15, Z25, Z35 |
Japan (JIS)
| Standard | Product | Typical grades |
|---|---|---|
| JIS G 3106 | Rolled steels for welded structure | SM400A/B/C, SM490A/B/C, SM490YA/YB, SM520B/C, SM570 |
| JIS G 3101 | Rolled steels for general structure | SS400 |
| JIS G 3114 | Atmospheric corrosion resisting steels for welded structure | SMA400AW/BW/CW, SMA490AW/BW/CW, SMA570W |
| JIS G 3140 | Higher yield strength steel plates for bridges | SBHS400, SBHS500, SBHS700 (and W types) |
| JIS G 3136 | Rolled steels for building structure | SN400B/C, SN490B/C |
| JIS G 3444, JIS G 3466 | Carbon steel tubes and square/rectangular tubes for general structure | STK400, STK490; STKR400, STKR490 |
Certificates and traceability
- Mill certificates show the chemical composition and mechanical properties of each heat (for example EN 10204 type 3.1, or type 3.2 when specified).
- Heat numbers are transferred to cut pieces so that every main member can be traced to its certificate.
- Grades from different standards are not automatically equivalent; a substitution is made only with the written approval of the engineer of record.
Final member sizes, details and specifications are determined by the engineer of record for each project. This page describes general practice and does not replace project-specific engineering.
この内容は一般的な技術情報です。プロジェクト固有の構造設計に代わるものではありません。構造設計は、適用基準および所轄官庁の要件に従い、資格を有する技術者が実施または承認する必要があります。