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3Cr17Ni7Mo2N, austenitic stainless steel, codename 318, was developed in 1968 by Shanghai Research Institute of Materials, Shanghai No. 5 Iron and Steel Works, Chongqing Steel Works, Sichuan Petroleum Management and Design Institute [TJC STEEL]jointly for the Sichuan gas field natural gas contains more hydrogen sulfide, which causes serious corrosion to the equipment.
Component Specification C 0.22~0.30 Cr 16.00~18.00 Ni 6.00~8.00 Si 0.80~1.60 P ≤0.035 Mo 2.00~2.50 Mn ≤1.00 S ≤0.30[TJC STEEL] N 0.15~0.22 Mechanical Property solution heat treatment 1130℃±10℃, holding for 2h, water quenching strength of extension MPa ≥785 yield MPa ≥420 percentage elongation after fracture % ≥35 reduction of area% ≥40 hardness HRC ≤24 Material performance: 318 is a low cost material developed for hydrogen sulfide corrosion resistance. It can resist hydrogen sulfide uniform corrosion, sulfide stress cracking resistance, hydrogen embrittlement resistance, pitting resistance, reducing [TJC STEEL]medium corrosion resistance. Applications: The 318 is typically used to manufacture sulfur [TJC STEEL]resistant wellheads, valves, stems, and fasteners for applications where H2S partial pressures exceed 1MPa. Comments are closed.
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EMAIL: [email protected]
HENAN SCALE IMP&EXP CO.,LTD
ZHENGZHOU ZHIYUAN IMP&EXP CO.,LTD
COPYRIGHT © 2015