Typical Product Grade	Diameter (mm)	Executive Standard	Main Application
Alloy round tube billet:20Cr,40Cr,25Mn2,28Mn2,30Mn2,40Mn2, 45Mn2,15CrMo,20CrMo,28CrMo,30CrMo, 35CrMo,25Mn2V,30Mn2V,33Mn2V,36Mn2V, 37Mn5,42MnMo7,27CrMoNbTi,20MnCr , S18R,L290,14MnVNb,HSL485S,HC16,L360 , 20MnCr	φ40～250	YB/T 5222 YB/T 5221 YB/T 5137 GB/T 3087 API spec.5CT API spec.5L, Corresponding international standard, Technical agreement	Used for making structural steel pipe, medium/low pressure pipe, high pressure pipe, boiler pipe, pipeline pipe, pipe for oil industry, automobile and mining, etc.
Premium carbon round tube billet: Q345 Series,Q460 A～E, 10, 15, 20, 30, 35, 45, 25Mn, 30Mn,40Mn,45Mn,20A
Automobile oil pipe round billet: ST30AL,ST52.0II,ST52.4,ST37.4
High pressure boiler pipe round billet:P22,P12,A106B,SA-106B,SA-210C, SA-210AL,20G,20MnG ,25MnG,12Cr1MoVG,15Cr MoG,12Cr2MoG,SA210C
Petroleum drill collar and rod billet: XH-2-I,XH-3-I,26CrMnMo,28CrMnMo, 28CrMnMo80,AISI4145H,45MnCrMo, 37CrMnMoA