Hastelloy G-3

Hastelloy G-3 is a high-performance nickel-based alloy within the Ni-Cr-Fe system, enhanced with molybdenum and copper for superior corrosion resistance. It offers excellent protection against oxidation, atmospheric corrosion, and stress corrosion cracking, along with strong resistance to localized corrosion such as pitting and crevice corrosion. Its relatively high iron content makes Hastelloy G-3 a cost-effective choice among nickel-based corrosion-resistant alloys, ideal for demanding industrial environments requiring durability and reliability.

Equivalent grades

• Hastelloy G-3
• UNS N06985
• W.Nr. 2.4619

Chemical Composition Reference

Cr: 21%~23.5%

Fe: 18%~21%

Co: 5%

Mo: 6%~8%

W: 1.5%

Nb: 0.5%

C: 0.015%

Mn: 1%

Si: 1%

Cu: 1.5%~2.5%

Physical Property Reference

• Density: 8.14 g/cm³

• Tensile Strength: 621 MPa

• Yield Strength: 241 MPa

• Melting Range: 1260-1343 ℃

• Elongation: 45%

Stock & Dimensions

Our warehouse has a large number of stock to provide you with a variety of products in different sizes, and can also customize the size according to your needs.
• Bar: 0.5~600mm Diameter
• Coil: 0.5~150mm Thick
• Plate: 0.5~200mm Thick
• Pipe: 6~630mm External Diameter; 0.5~40mm Wall Thick
• Available in specific sizes

Product Forms

We provide you with a variety of product forms, including but not limited to:
• Bar/Rod
• Pipe/Tube
• Coil/Strip
• Plate/Sheet/Circle
• Wire
• Fitting (Flange, Elbow, Tee…)
• Customize

Essential details

Hastelloy G-3 alloy is widely utilized in flue gas desulfurization systems, papermaking, phosphoric acid production steam generators, and heat exchangers due to its exceptional corrosion resistance. Its outstanding durability against H2S, CO2, and chloride corrosion makes it the preferred material for acid gas field oil well pipes. Globally, only a few manufacturers—Sumitomo (Japan), SMC (USA), V&M (Germany), and Sandvik (Sweden)—produce this specialized alloy, underscoring its high-performance and specialized application in demanding industrial environments.

Applications:

- Handling equipment

- Scrubbers

- Sour gas

- Oil production equipment