CPM 154 is a PM version of the popular 154 CM stainless knife steel. This CPM version offers the knifemaker improved toughness, grindability and better polishing results. CPM 154 offers the user better corrosion resistance, edge retention and more toughness than 440C.
Preheat: Optional preheat stage for unbalanced geometries or complex designs - Heat to 1400°F (845-870°C) Equalize.
Austenize: 1900-2000°F (1035-1095°C), hold time at temperature 30-60 minutes.
Quench: Air or positive pressure quench (4 bar minimum) to below 125°F (50°C), or salt or interrupted oil quench to about 1000°F (540°C), then air cool to below 125°F (50°C). Accelerated air quenching works well for thin sections, while minimizing warpage.
Tempering: Double temper at 400-1200°F (200-400°C). Hold for 2 hours minimum each time. (See Table) A cryogenic treatment may be used between the first and second tempers. Cryogenic treatments help to attain maximum hardenability and must always be followed by at least one temper. NOTE: CPM 154 may be tempered at 1000-1025°F (540-550°C)for optimum stress relieving, . Tempering in this range may result in a slightly lower corrosion resistance.
Cryogenic Treatments: Refrigeration treatments may improve long term dimensional stability by transforming retained austenite. Refrigeration treatments should generally be performed after the first temper, and must be followed by a temper.
Heat Treat Response
|at Aust. Temp.||30 min.||30 min.||15 min.|
|Modulus of Elasticity||30psix10(6) (207 GPa)|
|Density||0.281 lb/in3 (7780 kg/M3)|
|Thermal Conductivity||14.0 BTU/hr./ft./F 24.2 W/m/ °K)|
|CARTA Test Results||Transverse C-Notch|
|CPM S30V||145%||10.0 ft. lbs.|
|CPM 154||120%||2.5 ft. lbs.|
|440C||100%||2.5 ft. lbs.|