About Alloy
Hastelloy C4 is a nickel-chromium-molybdenum alloy known for its exceptional resistance to a wide range of corrosive environments, particularly in reducing conditions. This alloy offers high levels of resistance to stress corrosion cracking, pitting, and crevice corrosion, making it suitable for use in aggressive chemical processing environments.
The key elements in Hastelloy C4, including nickel, chromium, and molybdenum, contribute to its outstanding corrosion resistance properties. The high chromium content provides resistance to oxidizing media, while the molybdenum enhances its resistance to reducing environments. Additionally, the low carbon content in Hastelloy C4 minimizes carbide precipitation during welding, ensuring the material’s corrosion resistance in the welded condition.
Hastelloy C4 is commonly used in applications involving hot contaminated mineral acids, organic and inorganic chloride-contaminated media, and reducing environments. It finds extensive use in chemical processing, particularly in the production of chlorinated solvents, reprocessing of nuclear fuels, and in the pharmaceutical and petrochemical industries. Its resistance to corrosion and ability to withstand high-temperature and high-pressure conditions make it a valuable material for critical process equipment such as reactors, heat exchangers, and piping systems.
The alloy’s excellent fabricability allows for easy forming, welding, and machining, further enhancing its versatility in various industrial applications. Its reliability and resistance to corrosion make it a preferred choice for critical components in aggressive chemical environments.
In summary, Hastelloy C4 is a high-performance alloy known for its exceptional resistance to a wide range of corrosive environments, making it well-suited for applications in chemical processing, pharmaceuticals, petrochemicals, and other industries where exposure to aggressive chemical conditions is a concern.
Product Form
ASTM B574
ASTM B575
ASTM B619
ASTM B622
ASTM B626
DIN 2.4610
Chemical Composition
| Element | Content (%) |
| Chromium, Cr | 14-18 |
| Molybdenum, Mo | 14-17 |
| Iron, Fe | 3 max |
| Cobalt, Co | 2 max |
| Manganese, Mn | 1 max |
| Titanium, Ti | 0.7 max |
| Silicon, Si | 0.08 max |
| Phosphorus, P | 0.04 max |
| Sulfur, S | 0.03 max |
| Carbon, C | 0.015 max |
| Nickel, Ni | Remainder |
Property
| Properties | Metric | Imperial |
| Tensile strength | 738 MPa | 107000 psi |
| Yield strength ( @ 0.2% offset) | 492 MPa | 71400 psi |
| Elastic modulus | 211 GPa | 30600 ksi |
| Elongation at break (in 50.8 mm) | 42% | 42% |
Application
Chemical processing equipment
Nuclear fuel processing
Petrochemical Industry
Pharmaceutical Industry
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