CPM® 154 Stainless Steel Data Sheet



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.

Chemical Composition

Carbon 1.05%
Chromium 14.00%
Molybdenum 4.00%


Typical Applications

Specialty Cutlery
Custom Knives




Thermal Treatments

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

Austenizing Temp.
Tempering Temp 1900F 1950F 2000F
As Quenched 626154
400F (200C)595952
600F (315C)585650
800F (425C)565750
1000F (540C)546054
Min. Time
at Aust. Temp.30 min.30 min.15 min.
Min. Number
of Tempers222

Surface Treatments

Nitriding decreases the corrosion resistance of stainless steels and is generally not recommended for stainless steels.

Annealing


Heat to 1650°F (900°C), hold 2 hours, slow cool no faster than 25°F (15°C) per hour to 1200°F (650°C), then furnace cool or cool in still air to room temperature.
Annealed Hardness: About BHN 235

Stress Relieving

Annealed Material: Heat to 1100/1300F(595/705C), hold two hours, cool in still air.
Hardened Material: Heat to 25F(15C) below original tempering temperature, hold two hours, cool in still air.

Welding

Use 440C or 420 stainless steel filler material.
Annealed Material: Preheat 600/800F(320/430C), maintain over 600F(320C) during welding. Reanneal or temper 1200/1400F(650/760C) for 4 hours after welding.
Hardened Material: Preheat to 50F(30C) below original tempering temperature (400F (205C) minimum). Maintain above 400F(205C) during welding. Cool to 150F(65C) after welding. Temper immediately 25F(15C) below original tempering temperature. Minimum 400F(205C)

Physical Properties

Modulus of Elasticity30psix10(6) (207 GPa)
Density0.281 lb/in3 (7780 kg/M3)
Thermal Conductivity14.0 BTU/hr./ft./F 24.2 W/m/ °K)

GradeEdge RetentionToughness
CARTA Test ResultsTransverse C-Notch
CPM S30V145%10.0 ft. lbs.
CPM 154120%2.5 ft. lbs.
440C100%2.5 ft. lbs.


CPM® is a registered trademark of Crucible Industries, LLC

For more information regarding knife steels, see our Knife Steel article and stay up-to-date at our Tool Steel Blog , where we release new articles first. You may also want to check out our Heat Treating Introduction.

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