What Stainless Alloy to SPF Titanium at 1650 F
What Stainless Alloy to SPF Titanium at 1650 F
(OP)
I am looking for a stainless casting alloy to be used to make the forming die for a super plastic formed part in titanium. The die blank will be cast to rough size and then final machined.
In my research with the titanium SPF guys I have found that 309 is used to prototype parts but they use a proprietary alloy for production runs and wouldn't tell me what is was.
The die will be subjected to repeated cycles of room temp to 1650 F. I want to avoid scaling as much as possible on the die. I have been told 309 scales after every run.
I am inclined to use 347, but I have no idea if this is castable??? 321 and 347 are used in our industry (race cars) for turbo exhaust systems. I don't think 321 with the titanium is very castable, however.
Any thoughts?
Thank you all in advance for your time.
In my research with the titanium SPF guys I have found that 309 is used to prototype parts but they use a proprietary alloy for production runs and wouldn't tell me what is was.
The die will be subjected to repeated cycles of room temp to 1650 F. I want to avoid scaling as much as possible on the die. I have been told 309 scales after every run.
I am inclined to use 347, but I have no idea if this is castable??? 321 and 347 are used in our industry (race cars) for turbo exhaust systems. I don't think 321 with the titanium is very castable, however.
Any thoughts?
Thank you all in advance for your time.





RE: What Stainless Alloy to SPF Titanium at 1650 F
Some of the high temp casting grades might work, a 25%Cr Ni based alloy, but it would get expensive fast.
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RE: What Stainless Alloy to SPF Titanium at 1650 F
There is another alloy from AK Steel, 18SR, that is a vast improvement on any of the above alloys. I don't know whether it can be cast or used as weld overlay, as mentioned in the previous post, is a matter that will require a call to AK Steel. It carries no Nickel so the cost shouldn't kill you if the material is applicable to your application.
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RE: What Stainless Alloy to SPF Titanium at 1650 F
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RE: What Stainless Alloy to SPF Titanium at 1650 F
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RE: What Stainless Alloy to SPF Titanium at 1650 F
RE: What Stainless Alloy to SPF Titanium at 1650 F