Chemical Composition (%)
| C | Mn | Si | P | S | Ni | Cr | Mo | |
| Range | ≤0.10 | 0.32-0.55 | ≤0.30 | ≤0.035 | ≤0.030 | ≤0.30 | ≤0.20 | ≤0.30 |
| Test | 0.075 | 0.37 | 0.22 | 0.016 | 0.024 | 0.050 | 0.025 | 0.007 |
Melting metal mechanical performance
| Tensile strength Rm (Mpa) | Yield strength Rp0.2 (Mpa) | Elongation ratio (%) | AKV(-30℃) | Shielding gas | |||||||
| Range | 550-740 | ≥460 | ≥17 | ≥27 | CO2 (purity≥99.8%) | ||||||
| Test | 635 | 568 | 19 | 62 | |||||||
