Hastelloy C276 Round Bar: Key Features, Benefits & Industrial Uses
Hastelloy C276, a corrosion-resistant superalloy from the nickel-molybdenum-chromium family, is widely trusted in industries that demand long-lasting performance under extreme conditions. Whether in aggressive chemical environments, high-temperature processing systems, or deep-sea exploration, Hastelloy C276 round bars stand as a critical material solution for engineers and project managers.
What Is Hastelloy C276?
Hastelloy C276 (UNS N10276) is a nickel-molybdenum-chromium alloy with added iron and tungsten. It was designed for severe environments, particularly those involving strong oxidizers, reducing agents, acids, and chlorides.
Key Highlights:
- Excellent resistance to pitting, crevice corrosion, and stress corrosion cracking
- Performs well in wet chlorine gas, hypochlorite, and chlorine dioxide
- Often used in highly corrosive processing conditions
Hastelloy C276 Chemical Composition
The alloy’s unique strength lies in its precisely balanced chemical composition, providing excellent corrosion resistance.
Element | Percentage (%) |
Nickel (Ni) | Balance |
Molybdenum (Mo) | 15.0 – 17.0 |
Chromium (Cr) | 14.5 – 16.5 |
Iron (Fe) | 4.0 – 7.0 |
Tungsten (W) | 3.0 – 4.5 |
Cobalt (Co) | ≤ 2.5 |
Manganese (Mn) | ≤ 1.0 |
Vanadium (V) | ≤ 0.35 |
Silicon (Si) | ≤ 0.08 |
Carbon (C) | ≤ 0.01 |
Sulfur (S) | ≤ 0.03 |
Phosphorus (P) | ≤ 0.04 |
Mechanical Properties of Hastelloy C276 Round Bar
Property | Value |
Tensile Strength | 690 MPa (min) |
Yield Strength (0.2% offset) | 283 MPa (min) |
Elongation | 40% |
Hardness (Rockwell B) | ≤ 100 |
Density | 8.89 g/cm³ |
Melting Point | 1325 – 1370°C |
Key Features of Hastelloy C276 Round Bar
- Corrosion Resistance: Immune to pitting, stress corrosion, and acid attack (hydrochloric, sulfuric, nitric, phosphoric)
- Weldability: Easily welded using GTAW, SMAW, and MIG techniques without the need for post-weld heat treatment
- High-Temperature Resistance: Performs well up to 1000°C in oxidizing and reducing environments
- Formability: Suitable for machining, forging, and cold/hot forming into custom shapes
Product Forms Related to Hastelloy C276
Form | Standards | Application |
Round Bar | ASTM B574 | Shafts, pins, flanges, high-pressure assemblies |
Flanges | ASTM B564 | Leak-proof pipe connections in corrosive systems |
Pipe Fittings | ASTM B366 | Elbows, tees, reducers for chemical piping |
Sheets/Plates | ASTM B575 | Linings, vessel walls, and marine hardware |
Industrial Applications of Hastelloy C276 Round Bars
Industry | Applications |
Chemical Processing | Reactors, scrubbers, heat exchangers, mixers |
Oil & Gas | Subsea valves, manifolds, risers, drill collars |
Pharmaceuticals | Acidic processing tanks, sterilization components |
Pulp & Paper | Bleaching towers, digesters, chemical recovery systems |
Waste Treatment | Incinerators, evaporators, waste processing systems |
Marine | Pump shafts, propeller shafts, deep-sea components |
Hastelloy C276 vs Equivalent Materials
Material | Comparison Factor | Remarks |
Alloy 625 | Better strength, less acid resistance | Used in aerospace, marine |
Alloy C22 | Higher resistance in oxidizing media | Better for nitric acid/chloride mixtures |
316 Stainless | Lower cost, inferior resistance | Not suitable for strong acids or high temperatures |
Monel 400 | Good in saltwater, less acid-resistant | Used in marine and oil transport |
Hastelloy C276 Round Bar: Technical Overview Chart
Feature | Details |
Product | Hastelloy C276 Round Bar |
Standard | ASTM B574 |
Available Sizes | 6 mm – 200 mm (or customized) |
Length | Up to 6 meters (custom cut available) |
Finish | Bright, Black, Peeled, Ground |
Certification | MTC EN 10204 3.1, NACE MR0175 |
Applications | High-pressure components, chemical systems |
Looking for trusted Hastelloy C276 round bar, flanges, or pipe fittings?
- We offer ASTM-certified materials
- Custom cut sizes and quick delivery
- MTC, test reports, and global shipping
Contact a trusted Hastelloy supplier in India today to get a competitive quote on your next Hastelloy alloy procurement!
Hastelloy C276 round bars are an engineering favorite for critical applications where most alloys fail. With their exceptional chemical resistance, mechanical integrity, and thermal stability, they provide a reliable solution in sectors where performance equals safety.
Whether you’re constructing chemical reactors, operating in seawater environments, or building high-pressure vessels, choosing Hastelloy C276 means choosing peace of mind and long-term operational reliability.
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