JIS G3106 SM490A/B/C steel Specification : Welding structural 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 3106 SM490AB/C Chemical Composition Analysis:
| Grade | C | Si | M | P | S |
| JIS 3106 SM490A | Thickness≤50mm 0.20max 200mm＞50mm 0.22max | 0.55 max | 1.60 max | 0.035 max | 0.035 max |
| JIS 3106 SM490B | Thickness≤50mm 0.18max 200mm＞50mm 0.20max | 0.55 max | 1.60 max | 0.035 max | 0.035 max |
| JIS 3106 SM490C | Thickness≤100mm 0.18max | 0.55 max | 1.60 max | 0.035 max | 0.035 max |
JIS 3106 SM490A/B/C steel Mechanical Properties:
| Grade | Yield point or proof stress N/mm² | Tensile strength N/mm² | ||||||
| Thickness of steel product (²) mm | Thickness mm | |||||||
| ≤16 | ＞16＜40 | ＞40＜75 | ＞75＜100 | ＞100＜160 | ＞160＜200 | ≤100 | ＞100＜200 | |
| JIS 3106 SM490A | 325 min | 315 min | 295 min | 295 min | 285 min | 275 min | 490 to 610 | 490 to 610 |
| JIS 3106 SM490B | ||||||||
| JIS 3106 SM490C | - | - | ||||||
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