S355JR
1.0045High-strength low-alloy structural steel with minimum yield strength of 355 MPa. Standard grade for bridges, buildings, cranes, and general structural applications. Impact tested at +20°C (JR).
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | ASTM | USA | ASTM A572 Grade 50 | K02502 | REF |
| 🇪🇺 | EN | Europe | S355JR | 1.0045 | 100% |
| 🇪🇺 | DIN | Europe | St52-3 (old) | — | 98% |
| 🇨🇳 | GB | China | Q355B | — | 95% |
| 🇬🇧 | BS | United Kingdom | BS 4360 50B | — | 92% |
| 🇯🇵 | JIS | Japan | SM490A | — | 90% |
Sources: ASTM A572/A572M, EN 10025-2:2019, DIN 17100, GB/T 1591, BS 4360, JIS G3106
Mechanical properties — Pro
General
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | ||
| Yield Strength | ||
| Elongation | ||
| Hardness HB | ||
| Elastic Modulus | ||
| Density |
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C10
1.0301Low-carbon unalloyed steel. Excellent weldability, good formability, and low hardness. Used for pins, rivets, bushings, case-hardened parts with thin case depth, and general cold-formed components. Can be case-hardened for surface wear resistance.
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