Alloy Data Sheet – Tough 25 High Chrome White Iron
This alloy maintains the abrasion resistance of the 25% chrome alloy with increased toughness. This alloy is used for thicker section castings exposed to a high impact environment, such as in mining and crushing and in the Alberta Oil Sands. Castings poured with this alloy can be machined, but not drilled or tapped. Machining would be done for fit surfaces only. The increased amount of Mo improves the hardenability of the alloy as well, which is a benefit to thicker section castings. For further increased toughness use an ASTM A532 Class II Type B.
For more information contact Penticton Foundry today.
Physical and Mechanical Properties (reference Abrasion Resistant Handbook)
Density lb/in3 (g/cm3)
Specific Heat at 70F Btu/lb·F (J/Kg·k)
Coefficient of Thermal Expansion Ɛ/F(Ɛ/C)X106 average between 70-1112F
Melting Temperature (F)
Compressive Strength Ksi (MPa)
Transverse Strength Ksi( MPa)
Brinell (depends on thickness)
This alloy meets the requirements for many applications such as:
Mining crusher liners
Oil Sands applications
Mining crusher parts
This alloy has good corrosion resistance. For a more extreme corrosion environment and abrasive wear mechanism consider using an alloy with 28-30% Cr.
This alloy is supplied in the hardened condition.
It can be machined and faced for fit purposes, but it can’t be drilled and tapped.
Inserts can be cast in if drilling and tapping is necessary.