Z-9 PM

Chemical compositions

Carbon............................1.80 %
Chromium......................5.25 %
Vanadium......................9.00 %
Molybdenum................1.30 %
Manganese....................0.30 %
Silicon...............................0.50 %

Description

Z-9 PM is the low vanadium and carbon version of Z-10 PM tool steel. This difference in composition results in significantly enhanced toughness and thermal fatigue properties. Although it has reduced attainable hardness, the grade retains superior wear resistance compared to most standard tool steel grades. The unique combination of properties make it suitable for select cold and warm- work tooling applications that involve heavy abrasion along with high risk of chipping and cracking. It is typically used at hardness less than HRc 58, and Z-9 PM should be considered for use if higher hardness is deemed necessary. The powder metallurgy processing utilized provides well known benefits including more consistent machinability, grindability, heat treat response, and dimensional stability when compared to conventionally produced, high alloy grades.

Typical applications

• plasticizing components
• extrusion tooling
• rolling mill rolls
• shear blades
• granulator and pelletizer blades
• forming rolls
• punches and dies

Thermal processing

Annealing
Heat uniformly in a protective atmosphere (or vacuum) to 1,650°F (900°C) and soak for 2 hours. Slow cool 30°F (15°C) per hour until 1,000°F (540°C). Parts can then be cooled in air or furnace as desired. Hardness expected is BHN 223-255