Ni Hard Castings
Manufacturer & Exporter of Ni Hard Castings.
We offer our client an excellent quality range of Ni-Hard Castings, which are manufactured from high grade quality raw materials. These NiI-Hard Castings can be customized as per our valued customers specifications. These Ni-Hard Castings are widely known for its durability and quality. We manufacture all types of Ni-Hard Casting Grade 1, 2 & 4.
Ni-Hard is the generic name for a family of white cast irons alloyed with nickel and chromium to give high hardness and outstanding resistance to abrasion.
Ni-Hard is an extremely 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 castings of 38 mm to 50 mm thick, 3.4% to 4.2% Ni is sufficient to suppress pearlite formation upon mold cooling. Heavier sections 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 of pearlite; excess nickel increases the amount of retained austenite and lowers hardness.
There are two distinct groups of Ni-Hard compositions:
• The medium alloyed Ni-Hard 1 and Ni-Hard 2.
• Ni-Hard 4.
These alloys are standardized in almost all industrialized nations under various designations.
>> Ni Hard types 1 and 2
- Metal-Working Rolls
- Grinding Mill Liners
- Pulveriser Rings
- Slurry Pump Parts
- Grinding Media
>> Ni Hard Type 4
- Slurry Pump Parts
- Impact Blow Bars
COMPOSITION & HARDNESS:
|Composition, per cent||Brinell Hardness|
|Ni Hard type 1||3.20||0.30||0.20||3.00||1.50||0.12||0.15||0.50||550||600|
|(AS2027 Gr Ni Cr 1-550)||3.60||0.80||0.80||5.00||3.00||max.||max.||max.||min.|
|Ni Hard type 2||2.80||0.30||0.20||3.00||1.50||0.12||0.15||0.50||500||550|
|(AS2027 Gr Ni Cr 2-500)||3.20||0.80||0.80||5.00||3.00||max.||max.||max.||min.|
|Ni Hard type 4||3.20||1.50||0.20||4.00||8.00||0.12||0.15||0.50||630||670|
|(AS2027 Gr Ni Cr 4-630)||3.60||2.20||0.80||5.50||10.00||max.||max.||max.||min.|