718 Impact Properties
718 Impact Properties
(OP)
Is there anything that can be done to help improve the low temperature impact properties of Inconel 718? By low temperature I am talking about -150 F.
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RE: 718 Impact Properties
RE: 718 Impact Properties
Solution Anneal @ 1870-1925 F for 2 hours
Multiple Choices for Ageing Procedure
1)1400F +/- 15F for 10 hours, then furnace cool @ 100F/hr to 1200F +/- 15F for 18 hours
2)1400-1450F +/-15f for 6-8 hours followed by an optional secondary precipitation hardening treatment @1325-1375F for 2-4 hours
The 718 will be used to make hex head bolts @ 1.75" which will be used as a component for a subsea blowout preventer on an oil well.
RE: 718 Impact Properties
If I were you, I would contact Special Metals directly. They should have even lower temperature impact data. I have personally worked with several individuals from Special Metals on ASME B&PV Code committee, and they are very knowledgeable about their product line.
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RE: 718 Impact Properties
Steve Jones
Materials & Corrosion Engineer
http://www.oilandgaspeople.com/cv/11499664
http://www.linkedin.com/pub/8/83b/b04
RE: 718 Impact Properties
RE: 718 Impact Properties
The melting practice could be either AOD or VOD followed by VAR or ESR.
We will be forging the heads and machining the underhead fillet. The threads will be rolled after the forged blanks have been solution annealled. The UTS has a minimum requirement of 175 ksi and as far as the loading goes, I do not know whether the bolts will be loaded in tension or shear.
Based on the information I was able to obtain from the special metals pdf I feel confident that I will be able to meet the customers required mechanicals. Thank you all for your help.
RE: 718 Impact Properties
RE: 718 Impact Properties