Which one is 321?
Thread Content
A few days ago, a friend argued with me about which one, 0Cr18Ni9Ti or 0Cr18Ni10Ti, corresponds to the American standard 321. Since it is used frequently, I think 0Cr18Ni10Ti is equivalent to 321. But my friend insisted on his view, saying that 0Cr18Ni9Ti is the true 321, and the other one is a misrepresentation; it’s not available for purchase in the market at all. What he said made me hesitant as well, so I quickly reviewed various material standards again; indeed, only 0Cr18Ni10Ti was listed, with no mention of 0Cr18Ni9Ti. Alas, the sea friends are so knowledgeable – who is right after all?
ASTM321 corresponds to SUS321; I think 321 is 0Cr18Ni9Ti.
321 is 0Cr18Ni9Ti; I think so too
So what is 1Cr18Ni9Ti? I think this is the real 321
1Cr18Ni9Ti is a very old steel grade; by consulting older steel grade manuals, it can be seen that its carbon content is slightly higher than that of 0Cr18Ni10Ti, making it equivalent to 321H. To determine what corresponds to 321, one can look at ASTM 312 to see the chemical composition of 321. Compare it again with the grades specified in GB/T20878 \"Stainless steels and heat-resistant steels – Grades and chemical compositions\"; the grade that is more similar is the one to choose
In the document I have, both 1Cr18Ni9Ti and 0Cr18Ni10Ti correspond to the American standard 321. “34 1Cr18Ni9Ti SUS321 321 S32100 30321 35 0Cr18Ni10Ti SUS321 321 S32100 30321”
Am I wrong? However, GB50316 only lists 0Cr18Ni10Ti, and HG20592 also states that 321 is 0Cr18Ni10Ti. So the standard is also wrong?
Is it Ni9 or Ni10? Why is there also something like 1Cr18 listed there? You just need to check the composition – anyway, ASTM A182 requires that the Ni content in 321 be between 9% and 12%, so there seems to be no need for debate. Hehe
Is it Ni9 or Ni10? Why is there also something like 1Cr18 listed there? You just need to check the composition – anyway, ASTM A182 requires that the Ni content in 321 be between 9% and 12%, so there seems to be no need for debate. Hehe
In GBT20078-2008, 06Cr18Ni11Ti (old designation 0Cr18Ni10Ti) corresponds to 321
This post was last edited by Master the art of giving and letting go on 2014-8-7 09:23. 1Cr18Ni9Ti: All 321-grade materials in our factory are produced as 1Cr18Ni9Ti...