I have a 5/8" dia. pin (1018 CRS) t

[kreut]

I have a 5/8" dia. pin (1018 CRS) that is case hardened (Rc 58) 0.020" deep. It is easy to find the properties of 1018 but how does the case hardening effect the strength/ properties of the pin.

Thanks

 

[met1]

There are several methods for case hardening and each will have varying effects on the properties. In general, case hardening: increases hardness, increases strength and adds compressive stresses. Most times it is used to increase wear resistance and/or bending stength and/or torque strength and/or fatigue strength - such as in axles.

To determine the properties for your specific application, the pin will probably have to be tested.

 

[unclesyd]

Here is some data from Bethlehem Steel a once Great Company.

AISI 1015, Fine Grain
T.S Y.S. Elon Red Hbn Izod
#/sq in #/sq/in % (2) % No FT. Lb.

As Rolled 61,000 45,000 39 61 126 81.5

As tested 73,000 46,000 32 71 149 91
.048 case with a 62RHc

!/2" Rd 106,250 60,000 13 33 217 50

1" Rd 75.500 44,000 30 69 156 85


The first two are test bars. The “as tested” is the standard .505" Rd test bar. The as rolled is a !’ dia Rd. This is all single heat data, but the mill run data shouldn’t vary very much.