本发明公开了一种极寒环境用X80M管线钢,其化学成分及质量百分比如下:C :0 .0 4 0 %~0 .060%,Si:0 .15%~0 .35%,Mn:1 .60%~1 .75%,P≤0 .012%,S≤0 .0030%,Ni:0 .15%~0 .30%,Cr:0 .10%~0 .20%,Cu:0 .10%~0 .20%,Al:0 .015%~0 .050%,Nb:0 .050%~0 .070%,Mo:0 .10%~0 .20%,Ti:0 .006%~0 .020%,Ca≤0 .0050% ,余量为Fe和杂质。为中俄东线南线极寒地带使用,产品规格32 .1mm*4340mm*12000mm,是目前国内与世界难度最大管线产品。
The invention discloses an X80M pipeline steel for extremely cold environment, whose chemical composition and mass percentage are as follows: C: 0.04% ~ 0.060%, Si: 0.15% ~ 0.35%, Mn: 1.60% ~ 1.75%, P≤ 0.012%, S≤ 0.0030%, Ni: 0.15% ~ 0.30%, Cr: 0.10% ~ 0.20%, Cu: 0.10% ~ 0.20%, Al: 0.015% ~ 0.050%, Nb: 0.050% ~ 0.070%, Mo: 0.10% ~ 0.20%, Ti: 0.006% ~ 0.020%, Ca≤0.0050%, allowance is Fe and impurity. The product specification is 32.1mm *4340mm*12000mm, which is the most difficult pipeline product in China and the world at present.