Hastelloy Alloy C276 Round Bars

Product Description

1. Material Identification and Cross References

• Trade Name: Hastelloy C-276 / Alloy C-276 / Nickel C-276

• UNS Number: UNS N10276

• DIN / WNr Standard: 2.4819

• EN Designation: NiMo16Cr15W

• ASTM Standards: ASTM B574 (Rod/Bar), ASTM B575, ASTM B619, ASTM B622

• ASME Standards: ASME SB-574

• NACE Specification: NACE MR0175 / ISO 15156 (Oil and Gas sour service)

2. Chemical Composition (Nominal Mass Percent)

• Nickel: Balance (Approximately 57.0)

• Molybdenum: 15.0 to 17.0

• Chromium: 14.5 to 16.5

• Iron: 4.0 to 7.0

• Tungsten: 3.0 to 4.5

• Cobalt: Maximum 2.5

• Manganese: Maximum 1.0

• Carbon: Maximum 0.010

• Silicon: Maximum 0.08

• Phosphorus: Maximum 0.04

• Sulfur: Maximum 0.03

• Vanadium: Maximum 0.35

3. Physical Properties

• Density: 8.89 grams per cubic centimeter (0.321 pounds per cubic inch)

• Specific Gravity: 8.89

• Melting Range: 1325 to 1370 degrees Celsius

• Electrical Resistivity: 1.30 microhm-meters at room temperature

• Modulus of Elasticity: 205 GPa (29.8 x 10^3 ksi)

• Thermal Conductivity: 10.2 W/m K at 100 degrees Celsius

• Mean CTE: 11.2 x 10^-6 per degree Celsius (25 to 100 degrees Celsius)

4. Mechanical Properties (Solution Annealed Condition)

• Tensile Strength: Minimum 690 MPa (100 ksi) / Typical 750 to 800 MPa

• Yield Strength (0.2% offset): Minimum 283 MPa (41 ksi) / Typical 350 to 400 MPa

• Elongation at Break (in 2 inches): Minimum 40 percent

• Rockwell Hardness: Maximum 100 HRB / Typical 85 to 95 HRB

• Brinell Hardness: Maximum 240 HBW

• Charpy V-Notch Impact Strength: High impact toughness maintained down to cryogenic temperatures

5. Thermal and Processing Parameters

• Solution Annealing Temperature: 1121 to 1177 degrees Celsius followed by rapid water quenching

• Hot Working Range: 950 to 1230 degrees Celsius (Avoid working below 950 degrees Celsius)

• Cold Working: Work hardens rapidly during cold deformation; requires intermediate annealing for heavy reductions

• Machinability: Low to moderate machinability (High work-hardening rate requires heavy-duty tooling, low speeds, and positive feeds)

6. Corrosion Resistance Profile

• High resistance to wet chlorine gas, hypochlorites, and chlorine dioxide solutions

• Exceptional resistance to strong oxidizing salts such as ferric and cupric chlorides

• Outstanding performance in severe reducing acids including sulfuric, hydrochloric, and phosphoric acids

• Immune to chloride-induced stress corrosion cracking and resistant to localized pitting and crevice corrosion

7. Manufacturing and Supply Specifications

• Available Formats: Hot Rolled Round Bars, Cold Finished Rods, Forged Round Blocks, Centerless Ground Shafts

• Diameter Range: 3 mm to 500 mm (Standard Stocking: 6 mm to 300 mm)

• Delivery Condition: Solution Annealed and Descaled / Bright Annealed / Precision Centerless Ground

• Bar Lengths: Fixed Lengths or Random Lengths from 2 meters up to 6 meters

• Surface Finishes: Black As-Forged, Turn-Peeled, Centerless Ground, Polished

8. Primary Industrial Applications

• Chemical processing vessels, reactors, heat exchangers, and agitator shafts

• Flue gas desulfurization (FGD) scrubbers, dampers, and duct liners

• Downhole oil and gas sour gas recovery components, valves, and pump shafts

• Pulp and paper bleach plant equipment, digesters, and chlorine processing systems

• Hazardous waste treatment incinerator components and marine seawater hardware