Technical Information: PM HS 30

Technical Information: PM HS 30
Technical Information: PM HS 30
PM HS 30 is a molybdenum/tungsten Cobalt high speed steel produced using the PM (powdered metal)
steel making process.
The grade has an excellent balance of toughness and wear hot hardness making it ideal for cutting tools
and for cold work tooling.
PM steels have excellent grindability vs conventional steels.
Carbon
Molybdenum
Vanadium
Sulfur
Cobalt
Typical Chemical Composition
1.32%
Chromium
5.00%
Silicon
3.10%
Manganese
0.22%
Tungsten
8.50%
4.10%
0.55%
0.70%
6.25%
High Speed Steel Properties Comparison
Physical Properties Modulus of Elasticity………………………31 psi x 106 ……….(207 GPa)
Density……………………………………… 0.286 lb/in3
Annealed Hardness…………………………205­250 Brinell Hardness (BHN)
Machinability…………………………………Similar to M2 Tool Steel
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Technical Information: PM HS 30
Heat Treatment
Annealing
Heat to 16000F, hold two hours
Slow cool 20oF/hour to 6000F
Then air or furnace cool to room temperature
Stress Relieving Performed prior or after machining to minimize distortion in heat treating
1100/1200oF, hold two hours
then air cool to room temperature
Hardening
Salt bath, protective atmosphere, or vacuum furnace equipment preferred. High Heat (Austenitizing)
1950/2200°F for 5 to 30 minutes at heat.
Higher Austenitizing temperatures require less time at heat
Quench
Salt bath quench to 1000­1100oF, equalize, then air cool to 150oF.
Vacuum or atmosphere quench rate of a minimum 50 degrees F per minute down to 1200F is critical to achieve best heat treat response.
Temper immediately following quench
Tempering Minimum 1000°F tempering temperature required.
Double tempering is required, triple tempering recommended.
Air cool to room temperature between tempers.
Typical Heat Treat Response
Tempering Temp °F Hardening Temp 1950°F Hardening Temp 2200°F As Quenched 64 64 1000 64 66 1025 62 65 1050 62 65 1075 61 64 1100 60 62 Longitudinal Size Change Approximately: plus 0.15% WWW.METAUXSOLUTIONS.COM
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