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Alloy C276 (Hastelloy C276, UNS N10276) corrosion resistant alloy in sheet, plate, bar, pipe, and tube forms. Certified supplier with competitive prices and global delivery.
When your project demands unparalleled resistance to severe corrosive environments, Alloy C276 (Hastelloy C276) is the industry-proven solution. As a versatile nickel-chromium-molybdenum superalloy, Hastelloy C-276 offers exceptional performance against pitting, stress-corrosion cracking, and oxidizing agents like chlorine. We supply high-quality Nickel Alloy C276 in various forms-sheet, plate, tube, pipe, and bar-to meet the rigorous demands of chemical processing, pollution control, and marine applications. Get immediate quotes and technical data for this superior corrosion-resistant alloy.
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Nickel Alloy C276 Technical Specification
Alloy C276, also known as Hastelloy C‑276 (UNS N10276), is a premium corrosion‑resistant nickel‑molybdenum‑chromium‑tungsten alloy with outstanding resistance to both oxidizing and reducing environments, including chlorides and sulfuric acid conditions. Due to its versatile performance, Alloy C276 is widely used in chemical processing equipment, petrochemical industries, pollution control systems, and marine environments. As a trusted C276 supplier, we offer Alloy C276 in sheet, plate, bar, pipe, and tube forms with international certifications and custom solutions.
| Property | Specification / Range |
|---|---|
| Alloy Name | Alloy C276 / Hastelloy C276 |
| UNS Number | N10276 |
| Standards | ASTM B575, ASME SB575 |
| Composition | Ni – Mo – Cr with Fe, W, Co, etc. |
| Form | Sheet, Plate, Bar, Tube, Pipe |
| Thickness | Custom 0.5 mm – 200 mm |
| Width | Up to 2500 mm |
| Length | Custom / Cut‑to‑length |
| Surface | Mill / Polished |
| Certifications | ISO9001, MTR, PMI |
| Testing | UT / Tension / Hardness / PMI |
INCONEL/Hastelloy C-276 (UNS N10276/W.Nr. 2.4819) is known for its corrosion resistance in a wide range of aggressive media. The high molybdenum content imparts resistance to localized corrosion such as pitting. The low carbon minimizes carbide precipitation during welding to maintain resistance to intergranular attack in heat-affected zones of welded joints. It is used in chemical processing, pollution control, pulp and paper production, industrial and municipal waste treatment and the recovery of "sour" natural gas. Applications in air pollution control include stack liners, ducts, dampers, scrubbers, stack-gas re-heaters, fans and fan housings. In chemical processing, the alloy is used for components including heat exchangers, reaction vessels, evaporators and transfer piping.
ASTM standard for Hastelloy C276
| ASTM Standard | Description |
|---|---|
| ASTM B575 / B575M | Nickel-Chromium-Molybdenum-Tungsten Alloy C276 pipes and tubes (seamless and welded) |
| ASTM B622 / B622M | Nickel-Chromium-Molybdenum-Tungsten Alloy C276 plate, sheet, and strip |
| ASTM B574 / B574M | Nickel-Chromium-Molybdenum-Tungsten Alloy C276 forging bar, rod, wire |
| ASTM B668 / B668M | Nickel-Chromium-Molybdenum-Tungsten Alloy C276 welded pipe |
| ASTM A351 | Pressure-containing castings in Hastelloy C276 (cast version) |
Chemical Composition
| Weight% | C | P | Si | Ni | Co | W | Mn | S | Cr | Mo | V | Fe |
| C276 | 0.01 max | 0.040 max | 0.08 max | Bal | 2.5 max | 3-4.5 | 1.00 max | 0.030 max | 14.5-16.5 | 15-17 | 0.35 max | 4-7 |
Typical Mechanical Properties
| Material | Ultimate Tensile (min) | Yield Strength (Min) | Elongation % | Hardness RB | ||
| KSI | MPa | KSI | MPa | |||
| C276 Tube | 105.4 | 727 | 45.4 | 313 | 70 | 92 |
| C276 Plate | 107.4 | 741 | 50.3 | 347 | 67 | 89 |
| C276 Bar | 110.0 | 758 | 52.6 | 363 | 62 | 88 |
| C276 Sheet | 115.5 | 796 | 54.6 | 376 | 60 | 86 |
Why Choose Alloy C276?
Exceptional Corrosion Resistance
Excellent resistance to both oxidizing and reducing media, including sulfuric acid, hydrochloric acid, phosphoric acid, wet chlorine gas, and chlorides. Its low carbon content minimizes carbide precipitation during welding, ensuring optimal performance in the as-welded condition.
Resistance to Localized Attack
High Molybdenum (Mo) content provides outstanding resistance to pitting and crevice corrosion, far surpassing standard stainless steels.
Excellent Weldability & Thermal Stability
Resists the formation of harmful phases post-welding, preserving corrosion resistance. Maintains structural integrity across a wide temperature range, from cryogenic to approximately 1900°F (1040°C).
Available Products and Specifications
INCONEL alloy C-276 is designated as UNS N10276 and Werkstoff Nr. 2.4819. It is listed in NACE MR0175 for oil and gas service. Alloy C-276 is available as pipe, tube, sheet, strip, plate, round bar, flat bar, forging stock, hexagon and wire. INCONEL alloy C-276 is approved as a material of construction by the ASME Boiler and Pressure Vessel Code. Allowable stresses for Section III construction up to 800°F, Section VIII, Division 1 construction up to 1250°F, and Section VIII, Division 2 construction up to 800°F are contained in Tables 1B and 2B of ASME Code Case Section II, Part D.
Rod, Bar, Wire and Forging Stock - ASTM B 462 (Rod, Bar and Forging Stock), ASTM B 564 & ASME SB 564 (Forgings), ASTM B 574 & ASME SB 574 (Rod, Bar and Wire), ISO 9723 (Rod and Bar), ISO 9724 (Wire), ISO 9725 (Forgings), DIN 17752, DIN 17753, DIN 17754, VdTÜV 400/12.98
Plate, Sheet and Strip - ASTM B 575/B 906 & ASME SB 575/SB 906, ISO 6208, DIN 17750, VdTÜV 400/12.98
Pipe and Tube - ASTM B 622/B 829 & ASME SB 622/SB 829 (Seamless Tube), ASTM B 626/B 751 & ASME SB 626/SB 751 (Welded Tube), ASTM B 619/B 775 & ASME SB 619/SB 775 (Welded Pipe), ISO 6207 (Seamless Tube), DIN 17751, VdTÜV 400/12.98
Welding Products - INCONEL Filler Metal C-276 - AWS A5.14 / ERNiCrMo-4, INCONEL Welding Electrode C-276 - AWS A5.11 / ENiCrMo-4 Others - ASTM B 366 & ASME SB 366 (Fittings), DIN 17744 (chemical composition)
Alloy C276 vs C22 VS INCONEL 625 VS 316L
| Property / Feature | Alloy C276 (Hastelloy C276) | Alloy C22 (Hastelloy C22) | Alloy 625 (Inconel 625) | 316L Stainless Steel |
|---|---|---|---|---|
| Corrosion Resistance | Excellent in oxidizing & reducing environments | Excellent in oxidizing environments, slightly lower in reducing | Very good in oxidizing environments | Good, limited in chlorides & acids |
| Chemical Composition | Ni + Mo + Cr + Fe + W | Ni + Cr + Mo + Fe | Ni + Cr + Mo + Fe + Nb | Fe + Cr + Ni + Mo |
| Temperature Resistance | Up to 1900°F / 1040°C | Up to 1600°F / 870°C | Up to 2000°F / 1093°C | Up to 1500°F / 815°C |
| Pitting & Crevice Resistance | Very high | Very high | Medium | Medium |
| Weldability | Excellent | Excellent | Good | Excellent |
| Typical Applications | Chemical processing, petrochemical, pollution control, marine | Aggressive chemical environments, oxidizing acids | Aerospace, power generation, chemical equipment | General industrial, food & pharma, mild chemical |
| Standards | ASTM B575, ASME SB575 | ASTM B574 | ASTM B443 | ASTM A312, ASTM A269 |
Alloy C276 FAQ (Hastelloy C276 / UNS N10276)
Q1: What is Alloy C276?
Alloy C276, also known as Hastelloy C‑276 (UNS N10276), is a nickel‑molybdenum‑chromium corrosion-resistant alloy designed for excellent performance in both oxidizing and reducing environments.
Q2: What are the main chemical components of Alloy C276?
Alloy C276 contains Ni (balance), Mo 15–17%, Cr 14.5–16.5%, Fe 4–7%, and W 3–4.5%, with small amounts of Co, Mn, and C to enhance corrosion resistance and mechanical properties.
Q3: What forms does Alloy C276 come in?
Alloy C276 is available in sheet, plate, bar, pipe, and tube forms, with custom thickness, width, and length to meet industrial requirements.
Q4: What standards does Alloy C276 follow?
Common standards include ASTM B575, ASME SB575, and other international specifications. Mill Test Reports (MTR) and PMI certificates are usually provided.
Q5: What industries use Alloy C276?
Alloy C276 is widely used in chemical processing, petrochemical, pollution control systems, marine and offshore, aerospace, pharmaceutical, and power generation applications.
Q6: How does Alloy C276 compare with Alloy C22 or 316L stainless steel?
C276 offers superior resistance to both oxidizing and reducing acids compared to C22 and far exceeds 316L stainless steel in aggressive chemical environments, especially against pitting, crevice, and stress corrosion cracking.
Q7: Can Alloy C276 be welded and fabricated easily?
Yes, Alloy C276 has excellent weldability and can be formed, machined, and fabricated while maintaining corrosion resistance and structural integrity.
Q8: What is the temperature resistance of Alloy C276?
Alloy C276 can typically operate in environments up to 1900°F (1040°C), depending on specific service conditions.
Q9: Are certifications available for Alloy C276?
Yes, international certifications such as ISO9001, SGS, MTR, and PMI are available to ensure quality and traceability for industrial applications.
Q10: How should Alloy C276 be stored and handled?
Alloy C276 should be stored in a dry environment, protected from moisture and contamination. Handling should avoid contact with acidic or chlorinated substances that could initiate corrosion before installation.
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