CRU-WEAR excels in applications that require higher wear resistance than D2, greater toughness than M2 high speed steel, or in applications that require both.
The combination of wear resistance, compressive strength, and exceptional toughness make CRU-WEAR a great choice for a wide variety of demanding tooling applications.
| Typical Chemistry | |
| Carbon | 1.10% |
| Manganese | 0.35% |
| Silicon | 1.10% |
| Chromium | 7.50% |
| Vanadium | 2.40% |
| Tungsten | 1.15% |
| Molybdenum | 1.60% |
| Typical Applications | ||
| Punches | Blanking Dies | |
| Knives | Thread Rolling Dies | |
| Shear Blades | Rolls | |
| Forming Blades | Planer Blades | |
| Gauges | Wear Parts | |
| Coining Dies | Trim Dies | |
| Laminating Dies | ||
- Annealed Hardness: 207/248 BHN
Thermal Treatments
Annealing: 1550-1600F(845-870C) Hold 2 hours, slow cool 50F(10C) per hour maximum to 1200F(650C).
Hardness: 225/255 BHN
Stress Relieving: (Prior to heat treat) 1100-1300F (595-740C), hold 2 hours and air or furnace cool.
Straightening: Best done warm 400-800F(200-430C).
Hardening: (Salt, vacuum or atmosphere)
Preheat: 1100-1200F (595/650C) equalize, 1550-1600F (845-870C) equalize.
High Heat: 1850-2050F (1010-1120C), hold 20/45 minutes at temperature.
Quench: Salt, air or positive pressure to below 150F(65C) or to a temperature at which the tool may be held comfortably in the bare hands.
Surface protection techniques should be used to prevent unintentional decarburization, carburization, or oxidation (scaling).
Tempering: 900-1050F (480-565C)
CRU-WEAR should be tempered as soon as the parts have cooled below 150F(65C). The usual tempering temperature is 900-1050F(480-565C) but this may be varied to suit the hardness or toughness requirements. Tempering time should be 2 hours minimum or at least one hour per inch (per 25mm) of total thickness for sections over 2"(50mm) thick. Double tempering is mandatory. Triple tempering is recommended. When multiple tempering is employed, the workpiece should be cooled to room temperature between the tempering operations.
Stress Relieving (Hardened Parts): Temper 25F(15C) below original tempering temperature.
| Hardening Data Air cooled from austenitizing temperature shown and double tempered 2+2 hours. |
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(1010C) |
(1065C) |
(1120C) |
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| Note: Optimal performance indicated by boxed hardness. | ||||
CRU-WEAR can be nitrided, steam tempered, or titanium-nitride coated if desired. If the CVD TiN treatment is used, care is required in vacuum hardening.
Physical Properties
Modulus of Elasticity ..................................................30-32 psi x 106 (207-221 GPa)
Specific gravity ........................................................................................................7.78
Specific Heat ............................................................................................................0.10
Density ..................................................................................0.281 lb/in3 (7785 kg/m3)