For stainless steel plate specification SA-240 ASME-II part A (2015 edition) shows Table 1 with chemical composition of all grades. In this table the austenitic and duplex grades are perfectly identified. However ferritic and martensitic grades are both on same list at the end of Table 1.
I’m not a metallurgist, and I dig in the internet for hours not finding something conclusive, so my questions are:
How can we know which one is ferritic and which one is martensitic?
I think one of the clues is Chromium and Nickel content but, what are the limits on Chromium and/or Nickel content to determine which one is ferritic or martensitic?
Is it possible and acceptable to do that considering nominal composition only?
Are there any reference (document, article or book) to understand how to do that?
I hope someone can assist me with this. Thanks in advance.
I’m not a metallurgist, and I dig in the internet for hours not finding something conclusive, so my questions are:
How can we know which one is ferritic and which one is martensitic?
I think one of the clues is Chromium and Nickel content but, what are the limits on Chromium and/or Nickel content to determine which one is ferritic or martensitic?
Is it possible and acceptable to do that considering nominal composition only?
Are there any reference (document, article or book) to understand how to do that?
I hope someone can assist me with this. Thanks in advance.