Chemical Composition and Mechanical Property for JIS G3444 | |||||||
Grade | C | Si | Mn | P | S | Tensile Strength MPA |
Yield Strength MPA |
STK290 | / | / | / | ≤0.050 | ≤0.050 | ≥290 | / |
STK400 | ≤0.25 | / | / | ≤0.040 | ≤0.040 | ≥400 | ≥235 |
STK490 | ≤0.18 | ≤0.55 | ≤1.65 | ≤0.035 | ≤0.035 | ≥490 | ≥315 |
STK500 | ≤0.24 | ≤0.35 | 0.30-1.30 | ≤0.040 | ≤0.040 | ≥500 | ≥355 |
STK540 | ≤0.23 | ≤0.55 | ≤1.50 | ≤0.040 | ≤0.040 | ≥540 | ≥390 |