• Model NO.：IR-B steel pipe
• Length：Fixed Length, by Random
• End Processing：Plain Ends
• Surface：Bare Pipe, Anti-Rust Painting
• Transport Package：Standard Seaworthy Packing
• Specification：Small diameter tubes
• Trademark：Iron&steel
• Origin：China
• HS Code：73045910
• Production Capacity：2000tons Per Month

Types of steel tubesOuter diametersWall thicknessCold-rolled tubesTube sizes(mm)Tolerances(mm)Tube sizes (mm)Tolerances(mm)>30~50±0.3>3~20±10%
Mechanical properties:Standard codesModels of steel tubesTensite strength(MPa)Yield strength(MPa)Elongation(%)HardnessGB308710335~475≥195≥24/20410~550≥245≥20/GB531020G410~550≥245≥24/20MnG≥415≥240≥22/25MnG≥485≥275≥20/15CrMoG440~640≥235≥21/12Cr2MoG450~600≥280≥20/12Cr1MoVG470~640≥255≥21/12Cr2MoWVTiB540~735≥345≥18/10Cr9Mo1VNb≥585≥415≥20/ASME SA210SA210A-1≥415≥255≥30≤143HBSA210C≥485≥275≥30≤179HBASME SA213SA213 T11≥415≥205≥30≤163HBSA213 T12≥415≥220≥30≤163HBSA213 T22≥415≥205≥30≤163HBSA213 T23≥510≥400≥20≤220HBSA213 T91≥585≥415≥20≤250HBSA213 T92≥620≥440≥20≤250HBDIN17175ST45.8/III410~530≥255≥21/15Mo3450~600≥270≥22/13CrMo44440~590≥290≥22/10CrMo910480~630≥280≥20/
Chemical composition:Standard codesModels of steel tubesChemical compositions(%)CSiMnPSCrMoCuNiVAlWTiNbNGB3087100.07~0.130.17~0.370.38~0.65≤0.030≤0.0300.3~0.65/≤0.25≤0.30//    200.17~0.230.17~0.370.38~0.65≤0.030≤0.0300.3~0.65/≤0.25≤0.30//    GB531020G0.17~0.240.17~0.370.35~0.65≤0.030≤0.030≤0.25≤0.15≤0.20≤0.25≤0.08     20MnG0.17~0.240.17~0.370.70~1.00≤0.030≤0.030≤0.25≤0.15≤0.20≤0.25≤0.08     25MnG0.18~0.240.17~0.370.80~1.10≤0.030≤0.030≤0.25≤0.15≤0.20≤0.25≤0.08     15CrMo0.12~0.180.17~0.370.40~0.70≤0.030≤0.0300.80~1.100.40~0.55≤0.20≤0.30      12Cr2MoG0.08~0.15≤0.500.40~0.70≤0.030≤0.0302.00~2.500.90~1.20≤0.20≤0.30      12Cr1MoV0.08~0.150.17~0.370.40~0.70≤0.030≤0.0300.90~1.200.25~0.35≤0.20≤0.300.15~0.30     12Cr2MoWVTiB0.08~0.150.45~0.750.45~0.65≤0.030≤0.0301.60~2.100.50~0.65≤0.20≤0.300.28~0.42 0.30~0.550.08~0.15B 0.002~0.008 10Cr9Mo1VNb0.08~0.120.20~0.500.30~0.60≤0.020≤0.0108.00~9.500.85~1.05≤0.20≤0.400.18~0.25≤0.015  0.06~0.100.03~0.07ASME SA210SA210A-10.13~0.19≥0.10.45~0.65≤0.030≤0.030          SA210C0.18~0.24≥0.10.80~1.10≤0.030≤0.030          ASME SA213SA213 T110.05~0.150.50~1.00.30~0.60≤0.030≤0.0301.00~1.500.50~1.00        SA213 T120.05~0.15≤0.500.30~0.61≤0.030≤0.0300.80~1.250.44~0.65        SA213 T220.05~0.15≤0.500.30~0.60≤0.030≤0.0101.90~2.600.87~1.13        SA213 T230.04~0.10≤0.500.10~0.60≤0.030≤0.0301.90~2.600.05~0.30   ≤0.0301.45~1.75B0.0005~0.0060.02~0.08≤0.040SA213 T910.08~0.120.20~0.500.30~0.60≤0.020≤0.0108.00~9.500.85~1.05 ≤0.400.18~0.25≤0.015  0.06~0.100.03~0.07SA213 T920.07~0.13≤0.500.30~0.60≤0.020≤0.0108.50~9.500.30~0.60 ≤0.400.15~0.25≤0.0151.50~2.00B 0.001~0.0060.04~0.090.03~0.07DIN 17175ST45.8/III≤0.210.10~0.350.40~1.20≤0.040≤0.040          15Mo30.12~0.200.10~0.350.40~0.80≤0.035≤0.035 0.25~0.35        13CrMo440.10~0.180.10~0.350.40~0.70≤0.035≤0.0350.70~1.100.45~0.65        10CrMo910