SM400A, SM400B and SM400C steel plates are Japanese standard rolled steel for welding structure, S represents steel, M represents welding, 400 is also the lower limit tensile strength 400MPa, A is the steel plate grade, without impact, B is the steel plate grade, impact at 20℃, C is the steel plate grade, impact at 0℃.
Technical standard for SM400A, SM400B and SM400C steel plates: JIS G3106.
Melting analysis of chemical composition of SM400A, SM400B and SM400C steel plates:
| C | P | S | ||||
| SM400A | t<=50mm | <=0.23 | - | >=2.5 | <=0.035 | <=0.035 |
| 50<> | <=0.25 | |||||
| SM400B | t<=50mm | <=0.20 | <=0.35 | 0.60-1.50 | <=0.035 | <=0.035 |
| 50<> | <=0.22 | |||||
| SM400C | t<=100mm | <=0.18 | <=0.35 | 0.60-1.50 | <=0.035 | <=0.035 |
Mechanical properties of SM400A, SM400B and SM400C steel plates:
| <=16 | 16<> | 40<> | 75<> | 100<> | 100<> | <=100 | |
| SM400A | >=245 | >=235 | >=215 | >=215 | >=205 | >=195 | 400-510 |
| SM400B | >=245 | >=235 | >=215 | >=215 | >=205 | - | 400-510 |
| SM400C | >=245 | >=235 | >=215 | >=215 | - | - | 400-510 |
