Cold Rolled or Cold Drawn Seamless Precision Steel

precision steel pipe pipe seamless steel pipe Used the high precision cold rolling bench to product tubes, with complete checking equipments. Consistent with DIN2391/EN10305/ASTM A519, used quality raw materials and reasonable production processes. Advantages: high precision size, high consistency, well roughness surface, excellent mechanical properties. Widely used in follow industries: hydraulic cylinder, construction machinery, electrical components, automobile or motorcycle's parts, concrete pump tubes, pipe core for aluminum foil, motor shell and so on. Chemical composition(%) of precision pipe’s common grades Standard Grade Chemical composition(%)C Si Mn S P Cr GB/T699 GB/T3639-2000 GB3077-88 10# 0.07 0.13 0.17 0.37 0.35 0.65 ≤0.035 ≤0.035 20# 0.17 0.23 0.17 0.37 0.35 0.65 ≤0.035 ≤0.035 35# 0.32 0.39 0.17 0.37 0.35 0.65 ≤0.035 ≤0.035 45# 0.42 0.50 0.17 0.37 0.50 0.80 ≤0.035 ≤0.035 40cr 0.37 0.44 0.17 0.37 0.50 0.80 ≤0.035 ≤0.035 0.08 1.10 25Mn 0.22 0.29 0.17 0.37 0.70 1.00 ≤0.035 ≤0.035 ≤0.25 37Mn5 0.30 0.39 0.15 0.30 1.20 1.50 ≤0.015 ≤0.020 Conventional mechanical properties of precision pipe StandardGrade Delivery Conditions BK BKW Tensile stengthσb(MPa) Make percentage elongationδ5(%) Tensile stengthσb(MPa) Make prcentage elongationδ5(%) GB/T3639-2000 GB3077-88 10# ≥410 ≥6 ≥375 ≥10 20# ≥510 ≥5 ≥450 ≥8 35# ≥590 ≥4 ≥550 ≥6 45# ≥645 ≥4 ≥630 ≥5 40cr ≥784 ≥12 37Mn5 ≥784 ≥12