GB5310 Seamless Steel Pipe
| Standard | Steel Code | Tensile Strength(MPa) | Yield Strength(MPa) | Elongation Percent(%) | Impact Power(J) | Rigidity |
| GB5310 | 20G | 410∼550 | ≥245 | ≥24 | ≥35 | / |
| 20MnG | ≥415 | ≥240 | ≥22 | ≥35 | / | |
| 25MnG | ≥485 | ≥275 | ≥20 | ≥35 | / | |
| 15CrMoG | 440∼640 | ≥235 | ≥21 | ≥35 | / | |
| 12Cr2MoG | 450∼600 | ≥280 | ≥20 | ≥35 | / | |
| 12Cr1MoVG | 470∼640 | ≥255 | ≥21 | ≥35 | / | |
| 10Cr9Mo1VNb | ≥585 | ≥415 | ≥20 | ≥35 | / |
Chemical Component
| Standard | Steel Code | Chemical Component(%) | |||||||||||||
| C | Si | Mn | P | S | Cr | Mo | Cu | Ni | V | Al | W | Nb | N | ||
| GB5310 | 20G | 0.17∼0.24 | 0.17∼0.37 | 0.35∼0.65 | ≤0.030 | ≤0.030 | ≤0.25 | ≤0.15 | ≤0.20 | ≤0.25 | ≤0.08 | ||||
| 20MnG | 0.17∼0.25 | 0.17∼0.37 | 0.70∼1.00 | ≤0.030 | ≤0.030 | ≤0.25 | ≤0.15 | ≤0.20 | ≤0.25 | ≤0.08 | |||||
| 25MnG | 0.23∼0.27 | 0.17∼0.37 | 0.70∼1.00 | ≤0.030 | ≤0.030 | ≤0.25 | ≤0.15 | ≤0.20 | ≤0.25 | ≤0.08 | |||||
| 15CrMo | 0.12∼0.18 | 0.17∼0.37 | 0.40∼0.70 | ≤0.030 | ≤0.030 | 0.80∼1.10 | 0.40∼0.55 | ≤0.20 | ≤0.30 | ||||||
| 12Cr2MoG | 0.08∼0.15 | ≤0.50 | 0.40∼0.70 | ≤0.030 | ≤0.030 | 2.00∼2.50 | 0.90∼1.20 | ≤0.20 | ≤0.30 | ||||||
| 12Cr1MoV | 0.08∼0.15 | 0.17∼0.37 | 0.40∼0.70 | ≤0.030 | ≤0.030 | 0.90∼1.20 | 0.25∼0.35 | ≤0.20 | ≤0.30 | 0.15∼0.30 | |||||
| 10Cr9Mo1VNb | 0.08∼0.12 | 0.20∼0.50 | 0.30∼0.60 | ≤0.020 | ≤0.010 | 8.00∼9.50 | 0.85∼1.05 | ≤0.20 | ≤0.40 | 0.18∼0.25 | ≤0.015 | 0.06∼0.10 | 0.03∼0.07 | ||
| Type of Steel Pipes | OD(D) | WT(S) | ||
| Cold Drawn Steel Pipe | OD(mm) | Tolerance (mm) | Wall Thickness(mm) | Tolerance (mm) |
| >30∼50 | ±0.3 | >3∼20 | ±10% | |
| >114∼159 | ±0.8% | ≤30 | ±10% | |
| >159∼219 | ±1.0% | |||
| Hot Rolled Steel Pipe | >219∼457 | ±1.0% | ≤20 | 10%,12.5% |
| >20∼40 | 10%,10% | |||
