Top Quality Hastelloy C276 Bars: Exceptional Performance Under Pressure
The Hastelloy C276 Bar is a high-performance alloy celebrated for its exceptional resistance to a wide range of corrosive environments. This superalloy is composed of a nickel-molybdenum-chromium matrix with the addition of tungsten, which enhances its ability to withstand harsh conditions, including exposure to strong oxidizing and reducing acids, pitting, crevice corrosion, and stress corrosion cracking. Hastelloy C276's unique chemical composition offers one of the highest levels of adaptability and corrosion resistance available in the market today. It is extensively utilized across various demanding industries, including chemical processing, pollution control, oil and gas, and marine applications, where reliable corrosion resistance and durability are essential.
What Is The Main Features of Hastelloy C276?
Hastelloy C276 is a highly versatile and corrosion-resistant nickel-molybdenum-chromium alloy that is widely used in demanding environments. Its unique composition provides several notable features, making it a preferred material in various industries. Here are the main features of Hastelloy C276:
1. Exceptional Corrosion Resistance:
Resistance to a Wide Range of Environments: Offers outstanding resistance to a wide variety of severe corrosive environments, including acidic, alkaline, and chloride-containing media.
Resistance to Pitting and Crevice Corrosion: Effectively resists localized forms of corrosion such as pitting and crevice corrosion, which are common in harsh environments.
Resistance to Oxidation and Sulfidation: Performs well in both reducing and mildly oxidizing conditions and resists oxidation at high temperatures.
2. Excellent Resistance to Stress Corrosion Cracking:
Maintains integrity in environments prone to stress corrosion cracking, particularly those containing chlorides, making it suitable for critical applications in the chemical processing and oil and gas industries.
3. High Temperature Stability:
Retention of Mechanical Properties: Maintains strength and corrosion resistance at elevated temperatures, making it suitable for high-temperature applications, such as in heat exchangers and furnaces.
Resistance to Thermal Cycling: Can withstand repeated heating and cooling cycles without significant degradation in performance.
4. Good Weldability:
Ease of Fabrication: Can be readily welded and fabricated using conventional techniques, such as gas tungsten arc welding (GTAW) and gas metal arc welding (GMAW), without the need for post-weld heat treatment.
Weld Integrity: Exhibits good weld integrity and resistance to weld-related cracking, ensuring robust joints in complex assemblies.
5. Versatility in Chemical Processing:
Resistance to a Wide Range of Chemicals: Resistant to a broad spectrum of aggressive chemicals, including sulfuric acid, hydrochloric acid, chlorine, formic and acetic acids, acetic anhydride, seawater, and brine solutions.
Suitable for Mixed Environments: Performs well in mixed industrial environments where both oxidizing and reducing conditions are present.
6. High Mechanical Strength:
Offers good mechanical strength and toughness, which provides reliability and durability in demanding applications, even under mechanical stress.
7. Resistance to Hydrochloric and Sulfuric Acid:
Particularly resistant to hydrochloric acid at all concentrations and temperatures, as well as sulfuric acid in both oxidizing and reducing conditions, making it ideal for acid processing applications.
8. Low Carbon Content:
The low carbon content of Hastelloy C276 minimizes carbide precipitation during welding, which enhances its resistance to intergranular corrosion, especially in the welded condition.
9. Resistance to Wet Chlorine Gas and Hypochlorite Solutions:
Provides protection against damage from wet chlorine gas, hypochlorite, and chlorine dioxide solutions, which are often found in bleaching operations and disinfection processes.
10. Non-Magnetic:
Hastelloy C276 is non-magnetic, which can be advantageous in applications where magnetic interference is a concern, such as in certain electronic or electromagnetic applications.
These features make Hastelloy C276 an ideal choice for components and equipment in highly corrosive and high-temperature environments across various industries, including chemical processing, oil and gas, pollution control, and power generation.
Element | Composition (Weight %) | Remarks |
---|---|---|
Nickel (Ni) | 57.0 min | Base metal, primary element providing corrosion resistance. |
Chromium (Cr) | 14.5 - 16.5 | Enhances oxidation and corrosion resistance. |
Molybdenum (Mo) | 15.0 - 17.0 | Increases strength, hardness, and resistance to pitting. |
Iron (Fe) | 4.0 - 7.0 | Minor element, balances alloy and improves workability. |
Tungsten (W) | 3.0 - 4.5 | Adds to corrosion resistance and enhances the alloy's high-temperature strength. |
Cobalt (Co) | 2.5 max | Present as a minor impurity, not intentionally added. |
Manganese (Mn) | 1.0 max | Minor element, can impact the alloy's hardness and strength. |
Vanadium (V) | 0.35 max | Improves strength, though present in small quantities. |
Silicon (Si) | 0.08 max | Minor element, should be kept low to maintain weldability. |
Carbon (C) | 0.01 max | Low carbon content to prevent carbide precipitation and enhance weldability. |
Phosphorus (P) | 0.04 max | Trace element, should be minimized as it can affect mechanical properties. |
Sulfur (S) | 0.03 max | Impurity that should be minimized to avoid compromising corrosion resistance. |
Physical and Mechanical Properties Of Hastelloy C276
Parameter | Value | Remarks |
---|---|---|
Density | 8.89 g/cm³ | High density due to the heavy alloying elements. |
Melting Point | 1325-1370°C | High melting point for high-temperature applications. |
Tensile Strength | 690 MPa (min) | Indicates the maximum stress the material can withstand while being stretched or pulled. |
Yield Strength | 283 MPa (min) | Stress at which the material begins to deform plastically. |
Elongation | 40% | Measures ductility; higher values indicate better ductility. |
Hardness (Rockwell B) | 85 (max) | Moderate hardness, suitable for various industrial applications. |
Modulus of Elasticity | 205 GPa | Measures stiffness; a high modulus indicates a rigid material. |
Thermal Conductivity | 10.2 W/m·K | Lower thermal conductivity typical of high-performance alloys. |
Electrical Resistivity | 1.28 µΩ·m | High resistivity, typical of alloys with nickel and chromium. |
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