Hastelloy C-276: Optimized Performance for Demanding Chemical Environments
Product Overview
Hastelloy C-276 is a nickel-chromium-molybdenum tungsten alloy renowned for its exceptional corrosion resistance and weldability. Its low carbon content minimizes carbide precipitation in the heat-affected zone (HAZ) during welding, making it ideal for fabricated chemical processing equipment operating in aggressive environments.
Key Advantages
Superior Corrosion Resistance
Resists a wide range of corrosive media, including oxidizing and reducing acids, chlorides, and sour gas environments.
Excellent Weldability
Minimal susceptibility to grain boundary precipitation in weld HAZs, eliminating the need for post-weld heat treatment in most cases.
Versatile Application Range
Suitable for harsh chemical processing, pollution control, pulp and paper, and pharmaceutical industries.
Proven Reliability
Maintains structural and corrosion-resistant integrity in temperatures from cryogenic to elevated ranges.
Chemical Composition (%)
Element | Min (%) | Max (%) |
Ni | Bal. | - |
Cr | 14.5 | 16.5 |
Mo | 15 | 17 |
Fe | 4 | 7 |
W | 3 | 4.5 |
Co | - | 2.5 |
C | - | 0.08 |
Mn | - | 1 |
Si | - | 1 |
V | - | 0.35 |
P | - | 0.04 |
S | - | 0.03 |
Performance Highlights
Weldability: Retains corrosion resistance in the as-welded condition.
Fabrication: Compatible with standard welding and machining techniques.
Stability: Resists stress corrosion cracking and pitting in chloride-rich environments.
Comparative Advantage Over Alternate Grades
While Hastelloy B-2 offers superior resistance to reducing acids, Hastelloy C-276 provides a balanced profile for both oxidizing and reducing media, with enhanced versatility for multi-process chemical systems.
Target Applications
Chemical reactors, heat exchangers, and piping systems
Flue gas desulfurization units
Waste treatment and acidic gas handling equipment
Pharmaceutical and fine chemical synthesis
Why Choose Hastelloy C-276?
Reduced Lifecycle Costs: Long-term durability minimizes maintenance and replacement needs
Design Flexibility: Enables complex fabrications without compromising corrosion resistance.
Industry Compliance: Meglobal standards for corrosion-resistant alloys.
Conclusion
Hastelloy C-276 delivers an optimized combination of weldability, fabrication ease, and corrosion resistance, making it a top-tier material for critical chemical process applications. By integrating C-276 into your equipment designs, you ensure operational reliability and longevity in the most challenging environments.