How To Identify An Unknown Casting Spec
How To Identify An Unknown Casting Spec
(OP)
We did a quick "spark" test on an unknown steel casting with the following result:
Fe 98.32
C 0.38
Mn 0.83
Si 0.18
Cu 0.062
Ni 0.087
Cr 0.0057
Mo 0.034
Hardness is HRB 80.
It seems to compare to a 1040 mild steel.
Can anyone suggest what ASTM or Military material spec for castings may be similar to this. We are looking to weld repair this and want to be sure we have correct electrode and pwht.
Thanks for any help.
Fe 98.32
C 0.38
Mn 0.83
Si 0.18
Cu 0.062
Ni 0.087
Cr 0.0057
Mo 0.034
Hardness is HRB 80.
It seems to compare to a 1040 mild steel.
Can anyone suggest what ASTM or Military material spec for castings may be similar to this. We are looking to weld repair this and want to be sure we have correct electrode and pwht.
Thanks for any help.





RE: How To Identify An Unknown Casting Spec
RE: How To Identify An Unknown Casting Spec
RE: How To Identify An Unknown Casting Spec
RE: How To Identify An Unknown Casting Spec
So then we would normally use a 7018 filler (SMAW) and preheat of 175 deg F, but am not sure if PWHT will be required for annealed condition? Suggestions please?
Thanks again.
RE: How To Identify An Unknown Casting Spec
This I can help you with. The preheat for this casting should be increased to 350 deg F, if the thickness is at or above 1". If less than 1", use 300 deg F for the preheat.
The E7018 is fine. I would suggest an H4 low hydrogen electrode. Also, perform either Liquid Penetrant or wet fluorescent MT of the weld and surrounding base metal after PWHT.
PWHT should be specified for this application - 1100-1200 deg F for 1 hour/inch of weld deposit thickness. Over 1" add 15 minutes of PWHT time for each inch of weld deposit thickness.
RE: How To Identify An Unknown Casting Spec
I'm with you on th PT/MT and the H4. But where do you get the suggested 300 deg F (< 1") preheat?
RE: How To Identify An Unknown Casting Spec
RE: How To Identify An Unknown Casting Spec
(can I ask you to stop by thread725-181295 over in Welding,Bonding & Fastening for your thoughts on another Stellite problem, whenever you get a chance?)