ASTM A269 和 A312的区别

这是二份不同的标准，ASTM A269是通改空用的，ASTM A312冷加工用的。饥歼毕用途不一样。ASTM A269 Standard Specification for Seamless and Welded Austenitic Stainless Steel Tubing for General Service通用奥氏体不锈钢无缝管和焊接管ASTM A312 Standard Specification for Seamless,Welded,and Heavily Cold Worked Austenitic Stainless Steel Pipes冷加工奥氏体不锈钢烂芹焊接管和无缝管说明：ASTM是美国材料与试验协会（American Society for Testing and Materials,ASTM）标准。