C276
Nickel C276, often referred to simply as Hastelloy C‑276, is a nickel‑molybdenum‑chromium alloy celebrated for its remarkable resistance to some of the most aggressive corrosive environments found in industry. Its balanced chemistry allows it to withstand pitting, crevice corrosion, and stress‑corrosion cracking in both oxidizing and reducing conditions—something very few alloys can achieve simultaneously. C276 maintains strength and stability across a wide temperature range, making it a trusted material for chemical processing, pollution control, oil and gas systems, and high‑purity industrial applications. Its reliability in environments where other alloys fail has earned it a reputation as one of the most versatile and corrosion‑resistant nickel alloys available today.
- Inventory & Specs
- Chemical Composition
- Physical Properties
- Mechanical Properties
- Datasheet
- Additional Info
- FAQs
Inventory Size Ranges for C276
| Type | Thickness | AMS Standards | ASTM | UNS | Get a Quote |
|---|---|---|---|---|---|
| Precision Reroll Strip | 0.0008" - 0.015" | AMS 4544 | ASTM B 127 | UNS N04400 | Get a Quote |
Characteristics of C276
C276 is considered one of the most universally corrosion‑resistant alloys available, performing well in both oxidizing and reducing environments. It resists strong acids, mixed acid environments, wet chlorine, pitting, crevice corrosion, and stress corrosion cracking. C276 offers good high-temperature strength and has the ability to maintain performance in aggressive chemical and thermal environments.
Working with C276
C276 can be hot‑formed using established techniques for nickel alloys. Proper temperature control is important to avoid embrittling precipitates and to maintain corrosion resistance during forming operations. The alloy can also be cold‑formed, though it work-hardens more rapidly than many stainless steels. Cold forming requires higher force and may need intermediate annealing to restore ductility. C276 is known for excellent weldability, which is one of its most significant advantages. Its very low carbon and silicon contents allow it to retain corrosion resistance in welded conditions. C276’s ability to maintain corrosion resistance after welding is a key reason it is chosen for chemical processing equipment. Machining C276 requires careful planning due to its strength and work‑hardening behavior.
Other industry standards we comply with:
Common Trade Names
- Hastelloy C-276
Industry Applications for C276
- Reactors
- Heat exchangers
- Pressure vessels
- Downhole tubing
- Stack liners and ducting
- Geothermal plant components
- Pump housings
Chemical Composition
| Element | Percent by Weight Min | Percent by Weight Max | |
|---|---|---|---|
| Ni | Nickel | 57 | - |
| Co | Cobalt | - | 2.5 |
| Cr | Chromium | 16 | - |
| Mo | Molybdenum | 16 | - |
| Fe | Iron | 5 | - |
| W | Tungsten | 4 | - |
| Mn | Manganese | - | 1 |
| V | Vanadium | - | 0.35 |
| Si | Silicon | - | 0.08 |
| C | Carbon | - | 0.01 |
| Cu | Copper | - | 0.5 |
Physical Properties
| Property | Value |
|---|---|
| Density | 0.321 lb/in3 (8.90 g/cm3) |
| Specific Gravity | 8.90 |
| Magnetic Permeability | 1.02 |
| Specific Heat | 0.102 Btu/lb/°F (21°C) |
| Elastic Modulus 70°F (21°C) | 29.8 x 106 psi (205GPa) |
| Average from 70°F (21°C) | Linear Coefficient of Expansion | ||
|---|---|---|---|
| °F | °C | 10-6in/in/°F | 10-6cm/cm/°C |
| 200 | 93 | 6.2 | 11.2 |
| 400 | 204 | 6.7 | 12.0 |
| 600 | 316 | 7.1 | 12.8 |
| 800 | 427 | 7.3 | 13.2 |
| 1000 | 538 | 7.4 | 13.4 |
| Temperature | Thermal Conductivity | ||
|---|---|---|---|
| °F | °C | Btu/h•°F | W/m•K |
| -270 | -168 | 4.2 | 7.3 |
| -100 | 73 | 5.0 | 8.7 |
| 70 | 21 | 5.9 | 10.2 |
| 200 | 93 | 6.4 | 11.0 |
| 400 | 204 | 7.5 | 13.0 |
| 600 | 316 | 8.7 | 15.1 |
| 800 | 427 | 9.8 | 17.0 |
| 1000 | 538 | 11.0 | 19.0 |
Mechanical Properties
| Property | Value |
|---|---|
| 0.2% Yield Strength Minimum psi (MPa) | 41,000 (283) |
| Ultimate Tensile Strength Minimum psi (MPa) | 100,000 (690) |
| Elongation (% in 2") Minimum | 40 |
| Hardness Rb Maximum | 100 |
| Temperature | 0.2% Yield Strength | Tensile Strength | Elongation | |||
|---|---|---|---|---|---|---|
| °F | °C | Ksi | MPa | Ksi | MPa | (% in 2") |
| -320 | -196 | 82 | 565 | 140 | 965 | 45 |
| 150 | 101 | 70 | 480 | 130 | 895 | 50 |
| 70 | 21 | 60 | 415 | 115 | 790 | 50 |
| 200 | 93 | 55 | 380 | 105 | 725 | 50 |
| 400 | 204 | 50 | 345 | 103 | 710 | 50 |
| 600 | 316 | 46 | 315 | 98 | 675 | 55 |
| 800 | 427 | 42 | 290 | 95 | 655 | 60 |
| 1000 | 538 | 39 | 270 | 93 | 640 | 60 |
Datasheet
Additional Info
A Brief History of C276
Hastelloy C‑276 is one of the most widely recognized corrosion‑resistant nickel alloys. It belongs to Haynes International’s family of “corrosion‑resistant” superalloys and has been in use for several decades. It is regarded as one of the oldest still‑active, highly corrosion‑resistant superalloys, noted for its exceptional performance in highly aggressive chemical environments. The alloy was originally developed by Haynes International and later produced by other manufacturers after original patent restrictions expired.
How C276 was Developed
C276 was engineered as a nickel‑molybdenum‑chromium alloy with extremely low silicon content to ensure weldability and excellent corrosion resistance. Its balanced chemistry, including nickel as the base element with significant chromium and molybdenum, was selected to resist both oxidizing and reducing environments, especially those with mixed corrosive agents. This design made it one of the few alloys capable of maintaining corrosion resistance even in welded conditions.
Early Applications of C276
Early adoption of C276 centered heavily on chemical processing due to its ability to withstand strong acids, mixed acidic environments, wet chlorine, and other highly corrosive industrial chemicals. The alloy quickly became essential in flue gas desulfurization systems and chemical equipment. These early use cases solidified its reputation as one of the most universally corrosion-resistant alloys available.
How C276 is Used Today
Today, C276 remains a leading material for industries that require extreme corrosion resistance. Popular industries for this alloy include:
- Chemical Processing
- Oil & Gas
- Power Generation
- Aerospace
- Space
Your Trusted Supplier of C276 Nickel
United Performance Metals offers C276 precision rerolled strip sizes 0.0008" - 0.015". This product is certified AMS 4544, ASTM B 127, and UNS N04400.
Product FAQs
Compared to many superalloys, C276 offers superior performance in aggressive chemical environments. It does not rely on precipitation strengthening and is primarily valued for its corrosion resistance rather than creep strength.
Yes, due to its extremely low carbon and silicon levels, C276 maintains its corrosion resistance in the welded condition and can be welded using methods similar to other nickel alloys.
C276 offers good high-temperature strength and moderate oxidation resistance, though prolonged exposure can lead to formation of brittle precipitates. It is still suitable for many elevated‑temperature chemical and power applications.