Ni – Hard is an extreamely wear resistant material and in cast form is ideal for use with abrasive products, giving a much more extended life when compared with cast iron or mild steel when incorporated in pneumatic conveying systems.
Nickel content increases with section size or cooling time of the casting to inhibit pearlitic transformation. For casting of 38 to 50 mm thick, 3.4 to 4.2% Ni is sufficient to suppress pearlite formation upon mold cooling. Heavier section may require nickel levels up to 5.5% to avoid the formation of pearlite. It is important to limit nickel content to the level needed for control pearlite;excess nickel increase the amount of retained austenite and lowers hardness.
Uses of Ni-Hard in Typical Application
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Ni Hard type 1 and 2
- Metal-working rolls
- Grinding mill liners
- Pulveriser rings
- Lurry pump parts
- Grinding media
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Ni Hard type 3
- Slurry pump parts
- Impact blow bars