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| Standards | Grades | Chemical Element | ||||
|---|---|---|---|---|---|---|
| C max. % | Mn % | S% | P max% | Si | ||
| ASTM A572 | Grade 42 | 0.21 | ≤1.35 | 0.05 | 0.04 | ≤0.04 |
| Grade 50 | 0.23 | ≤1.35 | 0.05 | 0.04 | ≤0.04 | |
| Grade 55 | 0.25 | ≤1.35 | 0.05 | 0.04 | ≤0.04 | |
| Grade 60 | 0.26 | ≤1.35 | 0.05 | 0.04 | ≤0.04 | |
| Grade 65 | 0.23 | ≤1.65 | 0.05 | 0.04 | ≤0.04 | |
| Standard | Grade | Yield strength Re | Tensile strength Rm | Minimum elongation % | |
|---|---|---|---|---|---|
| MPa [ksi] | MPa [ksi] | min. 200 mm[8 in.] | min. 50 mm[2 in.] | ||
| ASTM A572 | Grade 42 | ≥290 [42] | ≥415 [60] | 20 | 24 |
| Grade 50 | ≥345 [50] | ≥450 [65] | 18 | 21 | |
| Grade 55 | ≥380 [55] | ≥485 [70] | 17 | 20 | |
| Grade 60 | ≥415 [60] | ≥520 [75] | 16 | 18 | |
| Grade 65 | ≥450 [65] | ≥550 [80] | 15 | 17 | |
| EU EN | USA - | Germany DIN,WNr | Japan JIS | China |
|---|---|---|---|---|
| S355JR (1.0045) | A572 A678Gr.A SSGrade50 | St52-3 | SM490A SS490 | Q345B Q345C |
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