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What material is this?

What material is this?

What material is this?

(OP)
Per PMI machine, the material is classify as a M3 with the following composition:
 
Mo~6.35%
Nb 0.5%
Zr  0.7%
W 5.65%
Fe 80.32%
Cr 3.93%
V 1.79%

What material is this?
Thanks!

RE: What material is this?

M3 is a Molybdenum-bearing, high speed tool steel. This was apparently the closest match in your PMI catalog of steels - for Cr, Mo and V. Actually, your steel is probably closer to a Type M2 high speed steel, because the V by mass content is closer to 1.8%.

http://www.cartech.com/techcenter.aspx?id=1692



Was the surface adequately prepped for a PMI?
 

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