410 ss
410 ss
(OP)
What are the chances of hot rolled plate, type 410 SS meeting impacts 35/40 @ -20F if first performing a Q & T treatment. No special chemistry controls were specified and just by memory I think the P was at .026. S .015.
If a heat treatment would likely work what would you suggest for a tempering temp. PWHT will be at 1400F for 1 hour.
Thanks,
If a heat treatment would likely work what would you suggest for a tempering temp. PWHT will be at 1400F for 1 hour.
Thanks,





RE: 410 ss
You are probably not going to like what I recommend, but your best bet is to conduct actual impact tests, if you have enough material. They are relatively inexpensive tests and you or anybody else cannot dispute the data.
Regarding post fabrication heat treatment, the temper needs to be selected based on your strength requirements. Also, make sure that you avoid lowering the impact properties from tempered martensite embrittlement (around 650-1000 deg F).
RE: 410 ss
From a "gut feel" it looks like your PWHT temp is going to be your tempering temp. Any lower than that would negate the tempering. Do you have other strength requirements like Tensile/Yeild/Elong etc. ?
By the way, 35/40 what, Ft.Lbs or Mills Lateral Expansion
(MLE) ?
RE: 410 ss
Q & T, and PWHT cycle and perform the mechanical tests. I just wonderded if this has any chance of meeting our requirements.
thanks,
RE: 410 ss
Agreed. If the 410 ss has a lower end carbon content, and is Q&T (temper at 1450 deg F for peak toughness) followed by PWHT at 1400 deg F to avoid disturbing the original temper it probably should make your impact requirements.
RE: 410 ss
RE: 410 ss
If I had to heat treat 410 that had an aspect ratio over 2.5 or so, I think I'd air cool it. If Impact Testing was required, I'd look into forced air cooling (fans). In fact, I think I'd have to prove that I couldn't achieve adequate properties with air cooling before I'd try to use a liquid quench. I've busted way too many parts made from 410.
By the same token, I'd be nervous about welding on it, too.
rp
RE: 410 ss
RE: 410 ss
Your PWHT temperature at 1275 deg F for this material is about right for your stated impact values. At 1400-1450 deg F, the data I have seen for 410 ss Q&T base metal puts you very close to 50 ft-lbs at -25 deg F. Again, the carbon content and PWHT or tempering temperature are two of the primary drivers that will either increase or decrease the 50 ft-lbs band. If the GTAW process is used to maintain grain refinement in the base metal HAZ, this will help. Either way, it will be a close call and impact testing is required.
RE: 410 ss