Hastelloy G-3

Supplied by Huaxiao-Alloy – Your Trusted Global Alloy Partner

1. Introduction to Hastelloy G-3

Hastelloy G-3 is a high-performance superalloy known for its outstanding resistance to a wide range of corrosive environments, including oxidizing and reducing acids. Its unique composition and microstructure make it ideal for applications in the chemical processing, petrochemical, and energy sectors, where materials are exposed to aggressive conditions.

2. Chemical Composition of Hastelloy G-3

The chemical composition of Hastelloy G-3 is carefully balanced to provide superior corrosion resistance and mechanical properties:

Nickel (Ni): Balance
Chromium (Cr): 21–23.5%
Iron (Fe): 18–21%
Molybdenum (Mo): 6–8%
Cobalt (Co): ≤5%
Copper (Cu): 1.5–2.5%
Tungsten (W): ≤1.5%
Silicon (Si): ≤1%
Manganese (Mn): ≤1%
Phosphorus (P): ≤0.04%
Sulfur (S): ≤0.03%
Carbon (C): ≤0.015%

This composition ensures that Hastelloy G-3 maintains its integrity and performance even in the most challenging environments.

3. Mechanical Properties of Hastelloy C-4

Hastelloy G-3 exhibits excellent mechanical properties, making it suitable for structural applications:

Tensile Strength: Minimum 110,000 psi (760 MPa)
Yield Strength (0.2% offset): Minimum 36,000 psi (250 MPa)
Elongation: Minimum 40%
Hardness: Rockwell B 90

These properties contribute to the alloy’s ability to withstand mechanical stresses and maintain structural integrity over time.

4. Corrosion Resistance

One of the standout features of Hastelloy G-3 is its exceptional resistance to corrosion:

Oxidation Resistance: Performs well in oxidizing environments, maintaining its protective oxide layer even at elevated temperatures.
Resistance to Chloride Stress Corrosion Cracking: Excellent resistance to chloride-induced stress corrosion cracking, making it ideal for marine and chemical processing applications.
Resistance to Sulfur Compounds: Demonstrates resistance to sulfur compounds, which are common in petrochemical environments.

These corrosion-resistant properties ensure the longevity and reliability of components made from Hastelloy G-3.

5. Applications

Hastelloy G-3 is utilized in various industries due to its superior properties:

Chemical Processing: Used in equipment exposed to aggressive chemicals, such as reactors and heat exchangers.
Petrochemical Industry: Ideal for components in contact with sour gas and other corrosive substances.
Energy Sector: Employed in power plants and nuclear facilities where materials are subjected to high temperatures and corrosive environments.

Its versatility makes Hastelloy G-3 a preferred choice for critical applications requiring reliability and performance.

6. Fabrication and Welding

Hastelloy G-3 can be fabricated using standard techniques:

Welding: Suitable for welding using various methods, including TIG and MIG, with appropriate filler materials.
Forming: Can be formed into sheets, plates, and other shapes using conventional methods.
Machining: Machinability is similar to other high-nickel alloys, requiring appropriate tooling and techniques.

These fabrication capabilities allow for the creation of complex components tailored to specific application requirements.

7. Advantages of Choosing Huaxiao-Alloy's Hastelloy G-3

Partnering with Huaxiao-Alloy for your Hastelloy G-3 needs offers several benefits:

Quality Assurance: Strict quality control processes ensure the consistency and reliability of each batch.
Customization: Ability to provide tailored solutions to meet specific customer requirements.
Technical Support: Expert guidance available throughout the selection, fabrication, and application processes.
Global Reach: Established supply chain to deliver products worldwide, ensuring timely availability.

Choosing Huaxiao-Alloy ensures access to high-quality Hastelloy G-3 products backed by comprehensive support.

8. Technical Data Sheet (TDS)

For detailed specifications and technical data on Hastelloy G-3, please refer to the following:

Chemical Composition: Nickel (Balance), Chromium (21–23.5%), Iron (18–21%), Molybdenum (6–8%), Cobalt (≤5%), Copper (1.5–2.5%), Tungsten (≤1.5%), Silicon (≤1%), Manganese (≤1%), Phosphorus (≤0.04%), Sulfur (≤0.03%), Carbon (≤0.015%)
Mechanical Properties: Tensile Strength: 110,000 psi (760 MPa) min, Yield Strength: 36,000 psi (250 MPa) min, Elongation: 40% min
Corrosion Resistance: Excellent resistance to oxidation, chloride stress corrosion cracking, and sulfur compounds
Fabrication: Weldable using TIG and MIG methods, machinable with standard techniques

For a comprehensive datasheet, please contact Huaxiao-Alloy’s technical support team.

9. Conclusion

Hastelloy G-3 from Huaxiao-Alloy represents a top-tier solution for industries requiring materials that can withstand extreme conditions. Its exceptional corrosion resistance, combined with robust mechanical properties, makes it an ideal choice for critical applications. By choosing Huaxiao-Alloy, you are partnering with a leader in the field, ensuring access to high-quality products and expert support.