Unknown material
Unknown material
(OP)
Can anybody tell me the alloy designation for the following composition? It came from the wear ring on an impeller.
C 0.05%
Si 0.4%
Mn 0.8%
Ni 5.2%
Cr 13.5%
Mo 1.4%
Nb 0.25%
Cu 1.7%
Fe balance
Thanks
C 0.05%
Si 0.4%
Mn 0.8%
Ni 5.2%
Cr 13.5%
Mo 1.4%
Nb 0.25%
Cu 1.7%
Fe balance
Thanks





RE: Unknown material
the chemistry you give is funny, I would like to say PH13-8Mo, but the Cr and Mn are high, while the Ni and Mo are low...
As mcguire explained to me a few years ago chem. analysis of SS is not quite as easy as carbon steels... Is this an arc&spark (OE spectro) analysis? You might want to try a few burns to see if the values for the elements move around much.
nick
RE: Unknown material
RE: Unknown material
I also thought a 4xx series SS, but the the carbon content and the Nickel are way off for any of the ones in my GEM.
I just looked into my ASM desk reference pg 15.3 and found:
s45000 Custom450 (xm-25)
C: 0.05
Mn: 1.00
Si: 1.00
Cr: 14.0-16.0
Ni: 5.0-7.0
Cu: 1.25-1.75
Mo: 0.5-1.0
Nb: 8x%Cmin
Not exactly what youve given but is rather close. The Cu, Ni and Cr are close.....
(this is A PH alloy also)
I do agree w/ metengr this is probably a hardened alloy for wear resistance.....
nick
RE: Unknown material
www.cartech.com
Custom 450
Carbon (Maximum)
0.050%
Manganese (Maximum)
1.0 %
Phosphorus (Maximum)
0.0300%
Sulfur(Maximum)
0.0300%
Silicon (Maximum)
1.0%
Chromium
14.0 TO 16.0%
Nickel
5.00 to 7.00%
Molybdenum
0.50 to 1.0%
Copper
1.3 to1.8%
Columbium/Niobium
8 X C Minimum
Iron
Balance
RE: Unknown material
Analysis is consistent around the part, done wih OES. Hardness is 33-35HRC
RE: Unknown material
Based on information provided Nick E and unclesyd and your reported hardness, the alloy is probably a Custom 450 ss (UNS S4500), age-hardened (H1050).