Steel question - 8670

[Gabe Newell]

What characteristics would you expect out of 8670:

C - .7
Si - .25
Mn -.5
P < .025
Cr - .4
Mo - .075
Ni - .85

Here's L-6 by way of comparison:
C - .7
Si - .5
Mn - .5
P - 0
Cr - .9
Mo - .5
Ni - 1.6

[Jerry Hossom]

Since I don't work with L6 I probably shouldn't reply here, but I would expect very similar results. The differences might be in the forging qualities more than the performance.

[Gabe Newell]

Thanks, Jerry.

[Kevin R. Cashen]

Originally posted by Gabe Newell
What characteristics would you expect out of 8670:

C - .7
Si - .25
Mn -.5
P < .025
Cr - .4
Mo - .075
Ni - .85

Here's L-6 by way of comparison:
C - .7
Si - .5
Mn - .5
P - 0
Cr - .9
Mo - .5
Ni - 1.6

Gabe:

I would expect to see less impact strength than what you would get with L6 due to the significantly lower levels of Si and Ni. Since it has about half the chrome you may not see the same depth of hardening as in L6. Ms and tempering ranges could change due to the difference in moly. It would have many similar attributes but to a lesser degree.

Chemistry is not set in stone but the L6 should probably read C- .75, Cr-.8 different sources will give different numbers, but it has been my experince that if it has the moly the C and the Cr would be closer to what I suggest.