Ni-hard and Ni-resist cast irons are both types of white cast irons designed for specific applications. Ni-hard, due to its high nickel and chromium content, martensitic structure, and the presence of chromium carbides, has exceptional hardness and wear resistance and is used in parts such as mill liners and crusher blades. On the other hand, Ni-resist, with its high nickel content, offers excellent thermal stability and corrosion resistance in corrosive environments and high temperatures in addition to moderate wear resistance, and is suitable for corrosive fluid pumps, turbine components, and the oil and gas industry. In general, Ni-hard is used for severe abrasion conditions and Ni-resist is used for corrosive environments and high temperatures.
| Grade | C (%) | Ni (%) | Cr (%) | Si (%) | Mn (%) | Other Elements (%) | Applications |
| Ni-Hard 1 | 3.0-3.6 | 3.3-4.8 | 1.5-2.6 | 0.3-0.5 | 0.3-0.7 | Mo: 0.2-0.6 | Rolling mill rolls, crushers, grinding media |
| Ni-Hard 2 | 2.9max | 3.3-0.5 | 1.4-2.4 | 0.3-5 | 0.3-0.7 | Mo: 0.2-0.6 | Slurry pumps, pulverizer parts, mill liners |
| Ni-Hard 4 | 2.8-3.6 | 6.0-8.0 | 7.0-11.0 | 0.5-1.0 | 0.8-1.2 | Mo: 0.2-0.6 | Coal pulverizer rolls, wear-resistant applications |
| Ni-Hard Class 1 | 2.5-3.5 | 3.0-5.0 | 1.4-2.5 | 0.5-1.0 | 0.5-1.0 | – | Abrasion-resistant parts |
| Ni-Hard Class 2 | 2.5-3.5 | 3.0-5.0 | 2.5-3.5 | 0.5-1.0 | 0.5-1.0 | Mo: 0.2-0.6 | Mining, power plant components |
| Ni-Hard Class 3 | 2.5-3.5 | 3.0-5.0 | 3.5-5.0 | 0.5-1.0 | 0.5-1.0 | – | High-impact wear parts |
| Ni-Resist Type 1 | 2.5-3.5 | 13-16 | 1.0-2.5 | 1.8-2.8 | 1.0 max | – | Corrosion-resistant pump and valve components |
| Ni-Resist Type 2 | 2.5-3.5 | 18-22 | 1.0-2.5 | 1.8-2.8 | 1.0 max | – | Marine applications, chemical processing |
| Ni-Resist Type 3 | 2.5-3.5 | 24-28 | 1.0-2.5 | 1.8-2.8 | 1.0 max | Cu: 1.5-2.5 | Elevated temperature and corrosion applications |
| Ni-Resist Type 4 | 2.5-3.5 | 28-32 | 1.0-2.5 | 1.8-2.8 | 1.0 max | Cu: 2.0-4.0 | Sulfate and chloride-resistant components |
| Ni-Resist Type 5 | 2.5-3.5 | 32-36 | 1.0-2.5 | 1.8-2.8 | 1.0 max | Cu: 3.0-5.0 | Severe chemical and heat resistance |
| Ni-Resist Type D-2 | 2.5-3.5 | 17-22 | 1.5-2.5 | 1.8-2.8 | 1.0 max | Cu: 1.5-2.5, Mo: 0.2-0.5 | Heat exchanger components |
| Ni-Resist Type D-4 | 2.5-3.5 | 28-32 | 1.5-2.5 | 1.8-2.8 | 1.0 max | Cu: 2.0-4.0 | High-chloride and marine environments |
| Ni-Resist Type 1b | 2.5-3.5 | 12-14 | 1.0-2.0 | 1.5-2.5 | 1.0 max | Al: 0.5 max | Heat-resistant machinery components |
| Ni-Resist Type 1c | 2.5-3.5 | 13-16 | 1.0-2.0 | 1.5-2.5 | 1.0 max | Al: 0.5 max, Cu: 0.5-1.0 | Power plant applications |
| Ni-Resist Type D-3 | 2.5-3.5 | 20-24 | 1.5-2.5 | 1.8-2.8 | 1.0 max | Cu: 2.0-4.0, Mo: 0.2-0.5 | Chemical processing equipment |
| Ni-Resist Class 2 | 2.5-3.5 | 22-28 | 1.5-2.5 | 1.8-2.8 | 1.0 max | Cu: 2.5-3.5 | Marine and heat-resistant components |
| Ni-Resist Class 3 | 2.5-3.5 | 30-35 | 1.5-2.5 | 1.8-2.8 | 1.0 max | Cu: 3.0-4.0 | High-temperature resistant valve seats |
| Ni-Resist Type 5a | 2.5-3.5 | 25-30 | 1.5-2.5 | 1.8-2.8 | 1.0 max | Cu: 2.0-4.0, Mo: 0.5-1.0 | Severe corrosion and thermal cycling |
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
