• Specification：Small diameter tubes
• Transport Package：Standard Seaworthy Packing
• Thickness：1.5mm~10mm
• Surface：Bare Pipe, Anti-Rust Painting
• End Processing：Plain Ends
• Length：Fixed Length, by Random
• Size：21mm to 114mm
• Section Shape：Round
• 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               Our factory has more than 10 sets Cold Rolling production lines for producing full range sizes of cold rolled seamless pipes by ASTM, ASME, DIN, GB/T standard. As professional manufacturer of Cold rolled steel pipes, we specialize in this kind of products since 2006.
Our company has professional teams for operating the orders for our foreign customers. we provide the best seaworthy packing and professional shipment services.