Higher is the ASTM No,finer is the grain size.Finer grain size(7 & up) is better for all mechanical properties, while coarser grains (ASTM No 4 to 7) are good for creep resistance.
ASTM specifies this range in order to have a balance of all properties in 300 series of ASS.
Thanks.
Sent from my Bell Samsung device over Canada's largest network.
-------- Original message --------
From: Kannayeram Gnanapandithan <kgpandithan@gmail.com>
Date: 2019-02-10 17:23 (GMT+05:30)
To: materials-welding <materials-welding@googlegroups.com>
Subject: Re: [MW:29076] grain size requirements for 321H stainless steel
Coarse for high creep strength and fine for high UTS
On Sun, 10 Feb 2019 4:22 pm sandeep kumar <sandeepdhiman63@gmail.com wrote:
Dear all--Please advise your views on below query:ASTM A182 10.1.2 Grades F 321H, F 347H, and F 348H shall have agrain size of ASTM No. 7 or coarser.What does it stand for coarser?Does it mean a higher ASTM grain size no (e.g. 8, 9 and so on) or lower ASTM grain size no. (e.g. 6, 5, 4 and so on)?Thanks & regardsSandeep
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
Visit this group at https://groups.google.com/group/materials-welding.
For more options, visit https://groups.google.com/d/optout.
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
Visit this group at https://groups.google.com/group/materials-welding.
For more options, visit https://groups.google.com/d/optout.
No comments:
Post a Comment