
Below is the ASTM A17 (the oldest standard I have) which withdrawn in 1945. The American Society for Testing and …

یکم مهر 1403 خشمگینم … نمیتوانم منطقی بنویسم از این فاجعهی تلخ و جانسوز… فاجعهی دردناک معدن زغالسنگ طبس … …
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 …