High-chrome alloy cast irons are recognized as one of the advanced engineering materials due to their excellent wear resistance and adequate strength, making them highly suitable for applications under harsh operating conditions. These cast irons, classified as white cast irons, feature a martensitic structure with precipitated carbides, which play a key role in enhancing wear resistance.
The martensitic structure of these cast irons enhances hardness and mechanical strength, while the presence of chromium carbides in the matrix provides exceptional wear resistance. This combination of properties makes high-chrome cast irons an ideal choice for conditions where components must withstand severe wear and moderate mechanical impacts.
In applications where components are exposed to both moderate impacts and intense wear, nickel-chrome cast irons are recognized as a favorable option. The addition of nickel to the cast iron alloy improves toughness and impact resistance, while chromium continues to play a primary role in wear resistance. These characteristics make nickel-chrome cast irons highly effective in specific industries, such as mining equipment, cement production, and material processing.
Overall, high-chrome alloy cast irons are considered an effective alternative to high-chrome steels in many industrial applications due to their unique properties, including high wear resistance, adequate hardness, and the ability to endure impact conditions. These features make them a reliable and cost-effective material for use in demanding operational environments.
Grade | C (%) | Cr (%) | Si (%) | Mn (%) | Ni (%) | Other Elements (%) | Applications |
ASTM A532 Class II A | 2.0-3.3 | 11-13 | 1.0-2.2 | 0.5-2.5 | – | Mo: 0.5 max | Abrasion-resistant liners, pumps |
ASTM A532 Class II B | 2.5-3.6 | 23-30 | 0.5-1.5 | 0.5-2.0 | – | Mo: 0.5-1.5 | High-wear conditions, slurry pumps |
ASTM A532 Class II C | 2.5-3.6 | 16-23 | 0.5-1.5 | 0.5-2.0 | – | Mo: 1.0-1.5 | Medium corrosion and abrasion resistance |
ASTM A532 Class III A | 2.3-3.6 | 25-30 | 0.6-1.2 | 0.5-2.0 | – | Mo: 0.5-1.5 | Cement mill liners, crushers |
ASTM A532 Class III B | 2.0-3.5 | 28-32 | 0.8-1.5 | 0.5-2.0 | – | Mo: 1.0-2.0, Cu: 0.5 max | Severe abrasive environments |
ASTM A532 Class III C | 2.5-3.5 | 30-35 | 0.5-1.5 | 0.5-1.5 | – | Mo: 1.0-2.0 | Severe high-wear industrial applications |
Nihard 1 | 3.0-3.6 | 1.8-3.2 | 0.3-1.0 | 0.5-1.0 | – | Mo: 0.2-0.6 | Mills, crushers, and industrial grinders |
Nihard 4 | 2.8-3.6 | 7.0-11.0 | 0.5-1.0 | 0.8-1.2 | – | Mo: 0.2-0.6 | Slurry pumps, coal mill parts |
High-Chromium 15% Cr | 2.2-3.5 | 14-18 | 0.5-1.5 | 0.5-2.0 | – | Mo: 0.5-1.5, V: 0.5 max | Wear plates, grinding media |
High-Chromium 20% Cr | 2.5-3.5 | 19-22 | 0.5-1.5 | 0.5-1.5 | – | Mo: 0.5-2.0 | High-abrasion and mild corrosion environments |
High-Chromium 25% Cr | 2.5-3.5 | 24-28 | 0.8-1.5 | 0.5-1.5 | – | Mo: 0.5-1.5, Cu: 0.5 max | Slurry pump impellers |
Cr35 | 2.5-3.6 | 28-35 | 0.8-1.5 | 0.5-1.2 | – | Mo: 0.8-2.0, Cu: 0.5 max | High-impact and corrosion environments |
Cr26 | 2.8-3.6 | 24-28 | 0.5-1.5 | 0.5-1.0 | – | Mo: 0.8-1.5, V: 0.5-1.0 | Abrasion-resistant pump liners |
Cr20 | 2.3-3.5 | 18-20 | 0.5-1.0 | 0.5-1.0 | – | Mo: 0.5-1.0 | Mining applications, cyclones |
HC250 | 2.5-3.5 | 23-25 | 1.0 max | 0.8 max | – | Mo: 1.0-2.0, Cu: 0.5 max | Cement plants, wear liners |
HC300 | 2.8-3.8 | 27-30 | 1.0 max | 0.8 max | – | Mo: 1.0-2.0, Cu: 0.5 max | Extreme wear-resistance applications |
HC350 | 2.5-3.6 | 32-35 | 0.8-1.5 | 0.5-1.0 | – | Mo: 1.5-2.5, Nb: 0.5 max | Heavy-duty slurry pumps |
Abrasion-Resistant 1 | 2.8-3.6 | 15-17 | 0.8-1.2 | 1.0 max | – | Mo: 0.5 max | Cement and mining applications |
Abrasion-Resistant 2 | 2.8-3.8 | 19-22 | 1.0-1.5 | 1.0 max | – | Mo: 0.5-1.5, Cu: 0.5 max | Crushers, mill liners |
Abrasion-Resistant 3 | 2.8-3.8 | 25-30 | 0.5-1.5 | 0.8-1.5 | – | Mo: 1.0-2.0, Nb: 0.5-1.0 | Severe wear and corrosion applications |
Sepahan Foolad Atashgah Casting Industries Company, with over 30 years of experience in the casting industry, is committed to self-sufficiency by leveraging skilled personnel and experienced managers. The company proudly serves various industries, including steel, copper, mining, cement, and their related sectors, as well as producing cast iron balls required by different industries.
Isfahan – Najafabad – Najafabad Industrial Park 2 – Sanat Square – Doctor Hesabi Blvd – Sub-corner 28
