A182 F6a Class 1
A182 F6a Class 1
(OP)
Hi folks,
I need to form, machine and weld A182 F6a Class 1 and I am wondering which HT would have better manufacturability (Forming, Welding, PWHT , Machining, etc.):
annealed, normalized and tempered, or tempered (as identified in A182)?
This part will be welded to 410 QT steel.
Appreciate if you can share your ideas/experiences!
Thanks,
I need to form, machine and weld A182 F6a Class 1 and I am wondering which HT would have better manufacturability (Forming, Welding, PWHT , Machining, etc.):
annealed, normalized and tempered, or tempered (as identified in A182)?
This part will be welded to 410 QT steel.
Appreciate if you can share your ideas/experiences!
Thanks,





RE: A182 F6a Class 1
RE: A182 F6a Class 1
These are tight tolerances rings (13 mm th.) TIG weld with Inco-82. We plan to use no/less preheat to avoid distortion if we can. Just wondering why annealed one would not be appropriate?
RE: A182 F6a Class 1
Thanks for the additional information regarding the tight tolerances, and use of rings. My question is what strength level do you need in service? This will determine final heat treatment condition. I see very little annealed 410 stainless steel in service. Most of the material is supplied and used in the quenched and tempered condition. You might want to re-consider use of preheat. This is probably the most significant variable to ensure reduced cracking when welding 410 stainless steel.
RE: A182 F6a Class 1
There is a PWHT cycle (~650 C)after welding as the counter part is Quench/Tempered 410. Also, the strength of these heat treatment conditions were stated the same on A182! which makes me to ask this question. The spec just asked for F6a class 1. Whats your thought on this?
Regarding preheat: I will do some pre-testing but I agree with you that we will ended up with some preheat.
Thanks.
RE: A182 F6a Class 1
RE: A182 F6a Class 1
Comparing A182 F6a Class 1 with A276 410 mechanical properties (both Y/T: 40/70 ksi), I believe F6a prop. mentioned in A182 is more close to Annealed condition. Although it mentioned as Min requirement.
RE: A182 F6a Class 1
RE: A182 F6a Class 1
Considering all these HT conditions have same mechanical properties, I don't see a difference in welding,machining and cold forming (to form the ring), do you?
RE: A182 F6a Class 1