PDF《20MnG》

Sunny Steel Enterprise Ltd.

Collect Steel pipe and fitting Resources Http://www.sunnysteel.com E-mail: [email protected] Page:1 of 20MnG, high manganese carbon carburizing steel.docx 20MnG High pressure boiler pipe 20MnG high pressure boiler pipe is a high manganese carbon carburizing steel, the harden-ability, strength and plasticity than

20 steel cutting performance also improved, good low temperature impact toughness and weld-ability. Used to manufacture camshafts, gears, couplings, hinges, pin toward, crankshaft bearing rings. Each length of pipe shall be subjected to the hydrostatic test. Also, each pipe shall be examined by a non-destructive examination method in accordance to the required practices. 20MnG high pressure boiler pipe Tag: 20MnG, 20MnG alloy pipe, high manganese carbon carburizing steel, Boiler steel pipe, High pressure pipe Application: Applicable to seamless tubes for making steam boiler whose pressure is high or higher and seamless tubes used as pipelines. Steel grade: GB 5310-

2008 Sunny Steel Enterprise Ltd. Collect Steel pipe and fitting Resources Http://www.sunnysteel.com E-mail: [email protected] Page:2 of 20MnG, high manganese carbon carburizing steel.docx 16MnG & 20MnG 的区别 两种材料都属于优质碳素结构钢,主要区别是含碳量不同,其他成分都是一样的.含碳量的不同跟材料性能 有直接关系. 16MnG 冷变形时的塑性中等可切削性好, 但焊接性较差. 宜调质处理后使用.适用于转轴.螺栓.螺母.螺钉等, 心轴.齿轮,也用于制造中型机械中的螺栓、螺母、杠杆等. 20MnG 碳素结构钢可在正火状态下使用,也可在淬火和回火状态下使用.切削加工性能好,冷变形时的塑性中 等,焊接性能不良.用于制造承受疲劳负荷的零件,如轴辊及高应力下工作的螺钉、螺帽等.热处理后,焊 接性低,具有过热敏感性和回火脆性,水淬易裂. 适用于耐疲劳件,曲轴,辊子,轴,连杆. Chemical Compositions(%) of 20MnG: Chemical elements Data C 0.17-0.24 Si 0.17-0.37 Mn 0.70-1.00 P ≤0.030 S ≤0.030 Cr ≤0.25 Mo ≤0.15 Cu ≤0.20 Ni ≤0.25 V ≤0.08 Sunny Steel Enterprise Ltd. Collect Steel pipe and fitting Resources Http://www.sunnysteel.com E-mail: [email protected] Page:3 of 20MnG, high manganese carbon carburizing steel.docx Mechanical Properties of 20MnG: Properties Data Yield Strength (Mpa) ≥415 Tensile Strength (Mpa)

240 Elongation (%)

22 The W.T. tolerance of 20G: W.T.(S) Tolerance of W.T.

20 D