Standardized Knowledge of Nickel-Hard Iron Castings

We offer customers a range of high-quality nickel-hard iron castings, crafted from premium raw materials. These NiI hard castings can be custom-made according to our valued clients' specific requirements. Renowned for their durability and superior quality, our nickel-hard castings are widely recognized in the industry. We produce nickel-hard castings of Grades 1, 2, and 4, catering to diverse needs.

Ni-Hard is a generic term for a family of white cast irons alloyed with nickel and chromium, known for their high hardness and exceptional wear resistance.

Ni-Hard's microstructure consists of carbides and a martensite-austenite-bainite or predominantly martensitic matrix. This is achieved through a balanced composition of C, Ni, Cr, and Si, combined with final heat treatment.

Ni-Hard is an exceptionally wear-resistant material whose cast form is ideally suited for use with abrasive products. Compared to cast iron or low-carbon steel, it offers a significantly longer lifespan when employed in pneumatic conveying systems.

There are two distinct Ni-Hard components.

1. Medium-alloyed Ni-Hard 1 and Ni-Hard 2 nominally contain 3.3% (2.6% respectively) C, 4% Ni, and 2% Cr.

2. Ni-Hard 4, nominally containing 3% carbon, 5% nickel, 9% chromium, and 2% silicon

These alloys are standardized under various names in nearly every industrialized country.

Nickel content increases with the size of the casting cross-section or the cooling time, helping to suppress pearlite transformation. For castings ranging from 38 mm to 50 mm in thickness, a nickel content of 3.4% to 4.2% is sufficient to prevent pearlite formation during mold cooling. However, heavier sections may require up to 5.5% nickel to fully avoid pearlite development. It’s crucial to keep nickel levels within the range needed to control pearlite—excess nickel can increase the amount of retained austenite and reduce hardness.

We have the expertise to manufacture and supply high-quality nickel-based castings.

For more information on nickel-hard castings, click here: High-Chromium White Cast Iron.