CPM S30V

C 1.45 Cr 14.00 Mo 2.00 V 4.00W 0.10-0.40 Mn 0.50 Si 0.50 N 0.10 Crucible

CPM S30V is a martensitic stainless steel designed to offer the best combination of toughness, wear resistance and corrosion resistance.
The process of producing CPM (Crucible Particle Metallurgy) steels involves gas atomization of pre-alloyed molten steel to form powder.
This powder is then screened and then isostatically compressed into 100% dense compacts.

Its chemistry has been specially balanced to promote the formation of vanadium carbides which are harder and more effective than chromium carbides
in providing wear resistance.

CPM S30V offers substantial improvement in toughness over other high hardness steels such as 440C and D2, and its corrosion resistance
is equal to or better than 440C in various environments.

MECHANICAL PROPERTIES

Toughness (Transverse Charpy C-notch Testing)
Grade Impact Energy

CPM S30V 10.0 ft. lbs.
154CM          2.5 ft. lbs.
440C             2.5 ft. lbs.

Although the longitudinal toughness for all three of these grades
is about 25-28 ft. lbs., the transverse toughness of CPM S30V is
four times greater than that of 440C or 154CM. These higher
transverse toughness results indicate that CPM S30V is much
more resistant to chipping and breaking in applications which
may encounter side loading. In knife making, its higher transverse
toughness makes CPM S30V especially good for bigger blades.

Edge Retention (CATRA Testing Relative to 440C)
Grade %

CPM S30V 145
154CM        120
440C           100

The CATRA (Cutlery & Allied Trades Research Association) test
machine performs a standard cutting operation and measures
the number of silica impregnated cards which are cut (TCC = total
cards cut). It is considered a measure of relative wear resistance.

Data courtesy of Crucible Industries LLC