Hastelloy C276 is a high-performance nickel-chromium-molybdenum alloy designed for outstanding corrosion resistance in a wide range of aggressive environments. Below is a typical Hastelloy C276 datasheet:
Chemical Composition of Hastelloy C276 (approximate):
| Element | Composition (Weight%) |
|---|---|
| Nickel (Ni) | 57.0 – 63.0 |
| Molybdenum (Mo) | 15.0 – 17.0 |
| Chromium (Cr) | 14.5 – 16.5 |
| Iron (Fe) | 4.0 max |
| Tungsten (W) | 3.0 – 4.5 |
| Cobalt (Co) | 2.5 max |
| Manganese (Mn) | 1.0 max |
| Silicon (Si) | 0.08 max |
| Carbon (C) | 0.01 max |
| Phosphorus (P) | 0.04 max |
| Sulfur (S) | 0.03 max |
Physical Properties of Hastelloy C276:
| Property | Value |
|---|---|
| Density | 8.89 g/cm³ |
| Melting Point | 1370 – 1399°C (2500 – 2550°F) |
| Modulus of Elasticity | 207 GPa (30 x 10⁶ psi) |
| Thermal Conductivity | 10.9 W/m·K |
| Specific Heat | 0.425 J/g·K |
| Electrical Resistivity | 0.75 μΩ·cm |
Mechanical Properties of Hastelloy C276:
| Property | Value |
|---|---|
| Tensile Strength (Yield) | 690 MPa (100,000 psi) |
| Tensile Strength (Ultimate) | 1030 MPa (150,000 psi) |
| Elongation | 30% |
| Hardness (Rockwell B) | 85 (approx.) |
| Yield Strength (0.2% offset) | 290 MPa (42,000 psi) |
Corrosion Resistance:
Hastelloy C276 exhibits excellent resistance to a wide range of corrosive environments, including:
Hydrochloric acid up to 40% at temperatures as high as 180°C (356°F).
Sulfuric acid, phosphoric acid, and acetic acid at elevated temperatures.
Resistance to stress corrosion cracking and pitting.
Suitable for use in highly oxidizing environments like chlorinated media.
Welding and Fabrication:
Hastelloy C276 can be welded using conventional methods such as TIG, MIG, and stick welding, but care should be taken to avoid overheating.
Preheating is generally not required, but post-weld heat treatment (PWHT) may be recommended for some applications to reduce residual stresses.
Hastelloy C276 is known for good weldability and can be easily welded without losing its corrosion resistance.
Applications of Hastelloy C276:
Chemical processing: Ideal for handling corrosive chemicals such as chlorine, hydrochloric acid, and sulfuric acid.
Pulp and paper industry: Used for equipment exposed to aggressive bleach chemicals.
Wastewater treatment: Employed in harsh environments where resistance to aggressive chemicals is necessary.
Marine environments: For components exposed to seawater.
Heat exchangers: Used in heat exchangers that handle aggressive fluids at high temperatures.
Standards and Specifications:
ASTM B575 / ASTM B619 / ASTM B622 / ASTM B626
ASME SB-575 / SB-619 / SB-622 / SB-626
This datasheet provides an overview of Hastelloy C276, a versatile alloy known for its strength and exceptional resistance to corrosion.
