Seamless steel tubes for oil casing and tubing

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Posting date : Feb 26, 2008

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Standard： API SPEC 5CT Standard of American Petroleum Institute Application： Seamless steel tubes for oil casing and tubing in oil wells Model N0．of steel tubes： J55，N80，L80，P110 etc． Diamensional tolerances: Types of steel tubes Outer diameter Wall thickness Cold-rolled tubes Tube sizes(mm) Tolerances(mm) Tolerances(mm) ＜114.3 ±0.79 －12.5％ ≥114.3 －0.5％，＋1％ Mechanical properties： Standard codes Models of steel tubes Tensite strength（MPa） Yield strength（MPa） Elongation（％） Hardness API SPEC 5CT J55 ≥517 379～552 check the table K55 ≥517 ≥655 N80 ≥689 552～758 L80(13Cr) ≥655 552～655 ≤241HB P110 ≥862 758～965 Chemical composition: Standard codes Models of steel tubes Chemical compositions（％） C Si Mn P S Cr Ni Cu Mo V Als API SPEC 5CT J55K55 (37Mn5) 0.34～0.39 0.20～0.35 1.25～1.50 ≤0.020 ≤0.015 ≤0.15 ≤0.20 ≤0.20 ≤0.020 N80 (36 Mn2V) 0.34～0.38 0.20～0.35 1.45～1.70 ≤0.020 ≤0.015 ≤0.15 0.11～0.16 ≤0.020 L80(13Cr) 0.15～0.22 ≤1.00 0.25～1.00 ≤0.020 ≤0.010 12.0～14.0 ≤0.20 ≤0.20 ≤0.020 P110 (30CrMo) 0.26～0.35 0.17～0.37 0.40～0.70 ≤0.020 ≤0.010 0.80～1.10 ≤0.20 ≤0.20 0.15～0.25 ≤0.08 ≤0.020 We are able to provide customers with quality products and perfect service. If you want to know more information, please kind to visit our website. www.sunnysteel.com Tel.:+8621-3378 0199 Fax:+8621 5107 9722