GB/T 25151.4-2010
ActiveFabrication and inspection method for high pressure urea equipment - Part 4: Intergranular corrosion tendency test specimen preparation for ultra low-carbon chromated nickel molybdenum austenitic stainless steel of urea grade
尿素高压设备制造检验方法 第4部分: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