JIS G3106 SM400A/B/C steel is used for the structure part with high requirement of mechanical property and welding performance in building, bridge, ship, automobile, pertroleum container and construction vehicles.
JIS G3106 SM400A/B/C chemical composition:
Grade |
Chemical composition % | ||||
| C | Si | Mn | P | S | |
| JIS G3106 SM400A | Thk≤50mm ≤0.23 Thk>20-200 ≤0.25 |
- | >2.5*C | ≤0.035 | ≤0.035 |
| JIS G3106 SM400B | Thk≤50mm ≤0.20 Thk>20-200 ≤0.22 |
≤0.35 | 0.60-1.40 | ≤0.035 | ≤0.035 |
| JIS G3106 SM400C | Thk≤100mm ≤0.18 | ≤0.35 | ≤1.40 | ≤0.035 | ≤0.035 |
JIS G3106 SM400A/B/C steel mechanical properties:
Grade |
Yield strength N/mm2 |
Tensile strength N/mm2 | Elongation | |||||||
| Thickness, mm | Thickness mm | Test sample | % | |||||||
| ≤16 | >16-40 | >40-75 | >75-100 | >100-160 | >160-200 | |||||
| JIS G3106 SM400A/B | ≥245 | ≥235 | ≥215 | ≥215 | ≥205 | ≥195 | 400-510 | ≤5 >5-16 >16-50 >40 |
No5 No1A No1A No4 |
≥23 ≥18 ≥22 ≥24 |
| JIS G3106 SM400C | ≥245 | ≥235 | ≥215 | ≥215 | - | - | ≥ | ≥ | ||
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