High Chromium Cast Iron Fittings

High-chromium cast fittings are wear-resistant parts made from high-chromium cast iron through processes such as sand casting and centrifugal casting. They are widely used in industries such as mining, cement, metallurgy, and coal, and are used for components such as crusher hammers, liners, roller sleeves, and wear-resistant pipes.

Core Advantages

1. Superior Wear Resistance: Containing 12%-30% chromium, it forms high-hardness M₇C₃ type carbides (hardness HV1800-2200), with wear resistance 5-10 times that of ordinary carbon steel, significantly extending service life.

2. Good Toughness and Impact Resistance: Through optimized composition (addition of molybdenum and nickel) and heat treatment, the matrix forms a martensitic/bainitic structure, balancing hard phase wear resistance with matrix support, and can withstand moderate impact loads.

3. Excellent Corrosion Resistance: Chromium forms a dense oxide film on the surface, resisting acidic and alkaline media and high-temperature oxidation, suitable for long-term use under harsh conditions.

4. Good formability + cost-effectiveness: The casting process can realize the customization of complex shapes, has high mass production efficiency, and its overall service life and maintenance cost are better than other wear-resistant materials (such as high manganese steel and ordinary alloy steel).