Understanding of 08Cr2ALMo steel

This post was last edited by Xie Yi Yunduan on December 22, 2021, at 11:56. 08Cr2A1Mo retains the contents of the corrosion-resistant elements Cr, Al, and Mo present in 12Cr2A1MoV steel, while reducing the carbon content in the steel. The absence of vanadium ensures that the produced steel pipes not only meet the manufacturing requirements for heat exchangers but also maintain a high resistance to sulfur-induced hydrogen corrosion. It is used in the manufacture of pressure vessels and holds good application prospects, especially in the production of heat exchangers. It not only has good weldability but also excellent corrosion resistance; for certain specific media, it can replace the more expensive 18-8 duplex stainless steel and Monel alloys. As a tube material for pressure vessels, 08Cr2AlMo has not yet been classified under any specific tube material standard. The application of this material shall comply with the requirements of Appendix A to the material section of GB150-2011, \"Carbon and low-alloy steel pipes\". Appendix A specifies requirements for chemical composition, mechanical properties, and the condition in which the material is supplied; it also states that other inspection requirements shall be carried out in accordance with GB9948. In addition, 08Cr2AlMo tubing is covered in NB/T47019-2011, which specifies its technical requirements. Therefore, the implementation standard should be: GB150 + NB/T47019

Thank you very much to “Xié Yī Yuánduàn” for the answer!