خواندن بعدی
Last week, I upload here a file called ASTM Terminology Standards. After that, Mohammad Fouladi suggested to prepare a file …
Stainless Steel is defined in ASTM A 941 as follows: A steel that conforms to a specification that requires, by mass percent, a minimum chromium content of 10.5 or more, and a maximum carbon content of less than 1.2 There …
امپراتوری “زمخت و سنگین” آهن و فولاد رو به افول گذاشته و غیرآهنی ها و رنگین ها و کمیاب ها …
