Hastelloy C-22 vs Hastelloy C-276: Same family — C-22 has more Cr for better oxidizing resistance
Hastelloy C-22 vs Hastelloy C-276
Side-by-side chemical composition and mechanical property comparison.
Overview
Hastelloy C-22
2.4602
Improved version of Hastelloy C-276 with better resistance to oxidizing media and higher chromium. Considered the most versatile Ni-Cr-Mo alloy for chemical processing. Resists both oxidizing and reducing acids, chlorides, and mixed media. Used for flue gas desulfurization, pharmaceutical, and universal chemical processing.
Hastelloy C-276
2.4819
The most versatile corrosion-resistant alloy available. Ni-Mo-Cr-W composition resists both oxidizing and reducing environments. Outstanding resistance to pitting, stress corrosion cracking, and wet chlorine gas. Used in chemical processing, flue gas desulfurization, pulp & paper, and waste treatment.
| Hastelloy C-22 | Hastelloy C-276 | |
|---|---|---|
| Material Number | 2.4602 | 2.4819 |
| Category | Nickel Alloys | Nickel Alloys |
| Standard | ASTM B575 | ASTM B575 |
Chemical composition (wt%)
| Element | Hastelloy C-22 | Hastelloy C-276 | Overlap |
|---|---|---|---|
| C | 0–0.01% | 0–0.01% | OK |
| Si | 0–0.08% | 0–0.08% | OK |
| Mn | 0–0.5% | 0–1% | OK |
| Cr | 20–22.5% | 14.5–16.5% | No overlap |
Mechanical properties
| Property | Hastelloy C-22 | Hastelloy C-276 | Unit |
|---|---|---|---|
| tensile_strength | ≥ 690 | ≥ 690 | MPa |
| yield_strength | ≥ 310 | ≥ 310 | MPa |
| elongation | ≥ 45 | ≥ 40 | % |
Compatibility Assessment
C-22 has higher Cr (20-22.5% vs 14.5-16.5%) for superior oxidizing environment resistance. C-276 has more Mo (15-17% vs 12.5-14.5%) for better reducing acid resistance. C-22 increasingly preferred as the universal grade.
Frequently Asked Questions
Is Hastelloy C-22 the same as Hastelloy C-276?
Hastelloy C-22 and Hastelloy C-276 have a 85% composition overlap. Same family — C-22 has more Cr for better oxidizing resistance
Can I replace Hastelloy C-22 with Hastelloy C-276?
In many cases, yes. The compositions overlap significantly (85%). However, always verify mechanical property requirements and heat treatment compatibility for your specific application.
What is the difference between Hastelloy C-22 and Hastelloy C-276?
The main differences are in the following elements: Cr, Mo, W, Fe. Hastelloy C-22 is a Nickel Alloys grade, while Hastelloy C-276 is a Nickel Alloys grade.
Related Comparisons
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