440C stainless
440C stainless
(OP)
I read on the webpage below that 440C is the hardest stainless available and will get to Rockwell C60. Is the manufacture process difficult compared to 304? I think it might end up more expensive. And where could I get some 0.2mm in R&D quantities in Europe? Thanks. Ant.
http://www.westyorkssteel.com/440C.html
http://www.westyorkssteel.com/440C.html





RE: 440C stainless
It could greatly help to focus the discussion.
Regards,
Mike
RE: 440C stainless
This post is me asking is Rockwell C60 and 2000 N/mm2 in 440C stainless the end of the line? Who could supply some and will it be painfully expensive?
I don't work with stainless - I'm trying to find out what I need before moving on to the next of many problems. R&D is essentially wasting money on the wrong parts until after a few orders I finally get what I need... :)
RE: 440C stainless
Glad I don't pay your R&D bills...
Regards,
Mike
RE: 440C stainless
I think you are approaching this from the wrong direction. Get material that has the hardness and thickness you want and then find out what corrosion problems you have and modify the material to address those problems.
rp
RE: 440C stainless
However, you still seem to be ignorant of the physical properties you desire. Re-read some of the responses to your earlier posts. All steels have virtually the same modulus of elasticity and will therefor deflect the same amount in a given geometry and loading. The difference is the amount of deflection before the material yields.
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RE: 440C stainless
Regards,
Ant.
RE: 440C stainless
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RE: 440C stainless
Sandvik didn't reply to my email so I will call them next week, there is also a company called Knight Strip metals who might stock some, I will try them. I will have to buy a laboratory oven or perhaps a pottery kiln. What would be the cheapest option?
Does anyone know the heating time for 17-4PH? The sandvik website said 1 hour at 575 Degrees C and another said 4 hours at 475 Degrees C. What would be the logic behind 1 hour or 4 hours?
Thanks,
Ant.
RE: 440C stainless
You age it to get it hard. Lower aging temps give higher hardness.
If you are going to grind or lapp this to your thickness I would harden it first. Temp control isn't that big of a deal, +/-25F (+/-10C) is fine. You may not hit peak hardness, but you will be close.
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Plymouth Tube
RE: 440C stainless
RE: 440C stainless
As I only need 1Kg this seems a waste. I'm a bit stuck.
My thought is try US stockists next, find someone who will supply 1Kg annealed, ship it to the UK and find someone who will cold roll it.
Any advice/thoughts?
Regards,
Ant.
RE: 440C stainless
RE: 440C stainless