25% High Chromium Alloy
The 25% Cr Alloy is the most common high chrome pure fetters poured at Penticton Foundry. This alloy has commanding abrasion resisting properties especially against gouging, grinding and scratching. 25% Cr material can be machined to experience tighter tolerances like those found in plimsoll and piping represent castings. Castings shink in this allay can be assuage and gently machined by Penticton Foundry. This 25% Cr fineness is a hypoeutectic makeup consisting of very hard feather and second-rate carbides in a array of martensite.
Physical and Mechanical Properties (from the Abrasion Resistant Handbook)
Density lb/in3 (g/cm3)
Thermal Conductivity Btu/hr·ft·F (W/m·K)
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, chute liners, ball mill liners (and lifter bars), slurry pumps, frac pumps, dredge pumps, impellers, oil sands applications, concrete rock crushing and recycling-machine parts (blowbars).
The 25% Cr alloy has an inconsistent tensile strength.
The 25% Cr alloy has good corrosion resistance for the majority of slurries it will be exposed to. In severe applications (like flue gas desulfurization) consider using a 28% – 30% Cr alloy.
Casting section thicknesses of 8 inches (200mm) are common.
Full through-hardness can be obtained in 8 inch sections via alloying and heat treatment.
Penticton Foundry can offer machining of 25% Cr.
Welding is not recommended on 25% Cr.
ASTM A532 Class III Type A