Casting ferritic stainless steel
Casting ferritic stainless steel
(OP)
Does anyone have any experience in casting ferritic stainless steel UNS S43940/X2CrTiNb18/1.4509?
We experince alot of shrinkage pores and possibly other defects.
There seems to be very few standardized ferritic stainless steel casting grades, compared with austenitic , martensitic and duplex.
Are ferritic stainless steel difficult to cast in general?
We experince alot of shrinkage pores and possibly other defects.
There seems to be very few standardized ferritic stainless steel casting grades, compared with austenitic , martensitic and duplex.
Are ferritic stainless steel difficult to cast in general?





RE: Casting ferritic stainless steel
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"It's better to die standing than live your whole life on the knees" by Peter Mayle in his book A Good Year
RE: Casting ferritic stainless steel
Good Ar gas cover, deox with Si, and make the Ti add right before you pour.
Limit the superheat, lower temp is better as long as you fill the molds.
You also have to keep hydrogen and nitrogen levels to a minimum of you will have not change a good mechanical properties.
I hope that you are casting thin sections or the grain size will be huge.
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Plymouth Tube
RE: Casting ferritic stainless steel
Just curious, does the foundry have AOD converter ? Else,I see it a big challenge,to produce an extremely low carbon melt technically and economically.
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"It's better to die standing than live your whole life on the knees" by Peter Mayle in his book A Good Year
RE: Casting ferritic stainless steel
Economy is where it becomes a real pain.
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Plymouth Tube
RE: Casting ferritic stainless steel
The foundry has an AOD converter and the carbon content is very low.
Why is the low carbon content and high Cr content a problem from a metallurgical point of view (high melting temp, viscosity...)?
Thanks for the casting process input and the reflections regarding Ti.
The thickness is maximum 10 mm.
Could 475C embrittlement be an issue?
RE: Casting ferritic stainless steel
What is the pouring temperature. What is the casting size and weight being poured? As a casting are you able to meet the test bar requirements for this grade?
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"It's better to die standing than live your whole life on the knees" by Peter Mayle in his book A Good Year
RE: Casting ferritic stainless steel
Be careful that you use a low annealing temp, you don't want to re-dissolve the TiC, if you do that you will end up sensitizing the parts.
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Plymouth Tube
RE: Casting ferritic stainless steel
We buy the component and are nor casting ourself. Therefore I don't know much about the process.
Anyhow, I know understand much better why there is a lack of standardized cast ferritic stainless steel grades.
I also have a better unerstanding wht the part I'm analysing look crappy.