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%