ASME BPVC 8-2 & 4340 steel
ASME BPVC 8-2 & 4340 steel
(OP)
I have a customer that wants to use 4340 for an asme vessel. Can anyone point me somewhere that explains why 4340 isn't listed in IId? I'm thinking there must be a good reason.
The other threads here mention things about it having too a high carbon content, but I can't find a reference supporting this. Rather, I find references saying it is a popular material for pressure vessels.
www.go ogle.com/# hl=en& sugexp=bvi e&cp=2 0&gs_i d=5&xh r=t&q= 4340+press ure+vessel
Thanks!
The other threads here mention things about it having too a high carbon content, but I can't find a reference supporting this. Rather, I find references saying it is a popular material for pressure vessels.
www.go
Thanks!





RE: ASME BPVC 8-2 & 4340 steel
As far as why - well, you should write an inquiry to the Code Committee and ask. Then, come to the meetings and present your question to the committee. Nothing like hearing it from the horse's mouth (no offense intended to II-D committee members).
RE: ASME BPVC 8-2 & 4340 steel
And how does your customer propose to deal with the issue of the HAZ being tempered to Dead Soft during the welding of nozzles.
RE: ASME BPVC 8-2 & 4340 steel
RE: ASME BPVC 8-2 & 4340 steel
TGS4 - it is only approved for bolts as used in part 4.16 (not part 5 for some reason, and I'm not sure how to draw the line)
Duwe6 - very true. We aren't welding this vessel.
RE: ASME BPVC 8-2 & 4340 steel
If you want to use this material, it will be necessary to develop a code case. Typically, 0.35% carbon content is the maximum for ASME B&PV Code materials, unless exemptions are given via code cases. You can try a code case for use in a vessel. However, this will require test data to be submitted at moderate and high temperature, along with weldability and formability demonstrations.
RE: ASME BPVC 8-2 & 4340 steel
Gonna make for a pretty expensive vessel.