尿素高压设备制造检验方法 尿素级超低碳铬镍钼奥氏体不锈钢 晶间腐蚀倾向试验的试样制取
Fabrication and inspection method for High pressure urea equipment preparation of the test coupons for the intergranular corrosion trend test on the urea grade extra low carbon Cr-Ni-Mo austenitic stainless steel