AISI 4130 heat treatment
AISI 4130 heat treatment
(OP)
At first, please forgive my English ability. This is the first time for me to post an English article on a forum. I hope it would not be an issue for you who wants to help me figure this out.
My company manufactures tubes/pipes by centrifugal casting. Recently we've received an order its main request is hardness:HB 240-320(HRC:23-34). The difficult part for us now is we are not sure about the heat treatment conditions, and there is no specific and clear procedure in the customer specification. Before the delivery, we will have the material rough machined. So the idea now is:casting->normalization(HRC:15-20) or annealing(HRC:5-10) -> rough machined -> quenching(easier to control the hardness) or tempering.(I learned this information from a heat treatment company)
Anyone can give some advice on this issue? Thanks!
My company manufactures tubes/pipes by centrifugal casting. Recently we've received an order its main request is hardness:HB 240-320(HRC:23-34). The difficult part for us now is we are not sure about the heat treatment conditions, and there is no specific and clear procedure in the customer specification. Before the delivery, we will have the material rough machined. So the idea now is:casting->normalization(HRC:15-20) or annealing(HRC:5-10) -> rough machined -> quenching(easier to control the hardness) or tempering.(I learned this information from a heat treatment company)
Anyone can give some advice on this issue? Thanks!





RE: AISI 4130 heat treatment
RE: AISI 4130 heat treatment
RE: AISI 4130 heat treatment
(1080-1100 deg F for 1 hr).
RE: AISI 4130 heat treatment
"Even,if you are a minority of one, truth is the truth."
Mahatma Gandhi.
RE: AISI 4130 heat treatment
RE: AISI 4130 heat treatment
Just want to make sure I'm not misunderstanding your suggestion.
RE: AISI 4130 heat treatment
RE: AISI 4130 heat treatment
RE: AISI 4130 heat treatment
If your customer is going to perform additional heat treatment and your tolerances are wide, I would recommend to just Normalize (1700F/930C) for 1-2 hours, air cool, then temper at 1050F/560C for 2-4 hours and air cool, then rough machine. Simpler, cheaper, and should meet your requirements.
On the other hand, if you need to meet specific tensile and impact strength requirements, then the process recommended by metengr is better suited (although I would still normalize at 1700F/930C since you are dealing with an as-cast structure.
If you are going to quench the material, be sure you quench it with the axis in a vertical position.
RE: AISI 4130 heat treatment
AMS5336 Steel, Investment Castings 0.95Cr - 0.20Mo (0.25 - 0.35C) (4130 Mod) Normalized or Normalized and Tempered
AMS2759/1 Heat Treatment of Carbon and Low-Alloy Steel Parts Minimum Tensile Strength Below 220 ksi (1517 MPa)
AMS-H-6875 Heat Treatment of Steel Raw Materials
Regards, Wil Taylor
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