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American/Imperial Equivalents of XC38 steel and XC48 steel

sirgreggins

Aluminum
Joined
Jun 7, 2016
I have a job coming up that is with a French company which calls for XC38 and XC48 steel. Does anyone know the American/Imperial equivalents or where to find this information? It looks somewhat close to 1045 but I'm a novice at alloys and composition.

Composition:
C% Mn% Si% Ni% Cr% Mo%
0.38 0.66 0.27 0.02 0.21 0.02
 

apt403

Cast Iron
Joined
May 24, 2015
Location
Yelm, Washington
My charts say XC38 is equivalent to 1035, and XC48 to 1045. The caveat however, is the Cr, Ni, Mo content. XC38, for example, only lists maximums for those alloying elements. 1035 is equivalent on paper, 0% is definitely less than the respective .4%, .4%, and .1% maximums. I'd check with your customer before making the substitution - that .9% in there makes the difference between a simple carbon steel, and something verging on a low-alloy tool steel.
 

Dave G.

Cast Iron
Joined
Mar 24, 2005
Location
Clev, OH
I think the Ni spec should be 0.20, not 0.02. If so, you can have your steel supplier hand pick steel that will meet the XC38 steel and XC48 steel specs. There are at least 3 specs that overlap the XC38 (1035, 1038, and 1040) and 2 for the XC48 (1045 and 1050). Ultimately you want the same strength level. Depending on the final application 1141 might be sub'd for both if it's just a few parts and not in a service that would result in high cyclic fatigue.
 








 
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