GB3087 Steel Pipe

Standard Steel Code Tensile Strength(MPa Yield Strength(MPa Elongation Percent(% Impact Power(J Rigidity
GB3087 10 335∼475 ≥195 ≥24   /
20 410-550 ≥245 ≥20   /

Chemical Component

Standard Steel Code Chemical Componet(%)
C Si Mn P S Cr Mo Cu Ni V AL W NB N
GB3087 10 0.07∼0.13 0.17∼0.37 0.38∼0.6 ≤0.030 ≤0.030 0.3∼0.65 / ≤0.25 ≤0.30 / /      
20 0.17∼0.23 0.17∼0.37 0.38∼0.6 ≤0.030 ≤0.030 0.3∼0.65 / ≤0.25 ≤0.30 / /      

 

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%