AISI 4130 vs AISI 8620
AISI 4130 vs AISI 8620
(OP)
We have received Choke Valve (API 6A, PSL-2, Material class EE) with body material grade AISI 8620 whereas our purchase order clearly calls for body material garde .
Can we accept AISI 8620 inplace of AISI 4130?
Manufacturer claims that both above grades are equivalent.
Any comments will be appreciated.
Thanks
Can we accept AISI 8620 inplace of AISI 4130?
Manufacturer claims that both above grades are equivalent.
Any comments will be appreciated.
Thanks





RE: AISI 4130 vs AISI 8620
Can we accept AISI 8620 inplace of AISI 4130?
Manufacturer claims that both above grades are equivalent.
Any comments will be appreciated.
Thanks
RE: AISI 4130 vs AISI 8620
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"It's better to die standing than live your whole life on the knees" by Peter Mayle in his book A Good Year
RE: AISI 4130 vs AISI 8620
The Grades are not equivalent, the 8620 contains lower carbon content and nickel for starters. Also, compare strength differences and compare weldability (carbon equivalent).
RE: AISI 4130 vs AISI 8620
RE: AISI 4130 vs AISI 8620
Yes, agree with Salmon2. API 6A doesn't address about specific material grade AISI 4130 or any.
But as per the review of as-built drawing it is noted that "Body-AISI 8620" welded to outlet component AISI 4130 - 4" class 1500 RTJ Flanges.
Any consequences if welding involved?
Looking for better discussion.
Thanks
RE: AISI 4130 vs AISI 8620
RE: AISI 4130 vs AISI 8620
RE: AISI 4130 vs AISI 8620
4130 should have a carbon equivalent of about .70 where 8620 would be between .50 and .55.
Bob
RE: AISI 4130 vs AISI 8620
If your PO called for 4130 and they supplied 8620, you should run this material substitution thorugh your technical group, since changing grades may affect welding procedures, working temperatures, or other characteristics of the inetnded application.
rp
RE: AISI 4130 vs AISI 8620
Gents thanks for your valuable input.