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SM400A, SM400B and SM400C comply with the Japanese standard JIS G 3106, and the raw materials are general carbon structural steel plates. A B and C are the three quality grades of the SM400 grade. The quality level A represents no impact, B represents 20℃ impact at room temperature, and C represents 0℃ impact.
Analysis of mechanical properties of SM400A, SM400B and SM400C steel plate:
| Grade | Yield point or yield strength, N/mm2 | Tensile strength, N/mm2 | ||||||
| Steel plate thickness, mm | Thickness, mm' | |||||||
| ≤16 | >16≤40 | >40≤75 | >75≤100 | >100≤160 | >160≤200 | ≤100 | >100≤200 | |
| SM400A | >=245 | >=235 | >=215 | >=215 | >=205 | >=195 | 400-510 | 400-510 |
| SM400B | ||||||||
| SM400C | - | - | ||||||
Chemical composition of SM400 steel plate:
when thickness ≤ 20mm, chemical composition (mass fraction) /%
C≤0.23; Si -; Mn≤2.5*C; P≤0.035; S≤0.035
When the thickness is between 50-200mm, chemical composition (mass fraction) /%
C≤0.25; Si -; Mn≤2.5*C; P≤0.035; S≤0.035
To be exact, the carbon content varies with the thickness
Requirements for carbon equivalent of SM400 steel plate:
Thickness ≤: 50mm, carbon equivalent,%: ≤ 0.44
Thickness > 50 ≤ 100mm, carbon equivalent,%: ≤0.47.
Thickness performance of SM400A SM400B and SM400C steel plate: Z15, Z25, Z35, such as SM400B-Z15, SM400B-Z25, SM400B-Z35, SM400C-Z15, etc.
