GB/T 25151.4-2010
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
Fabrication 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
GBT25151.4-2010, GB25151.4-2010