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Product Overview
Introduction To Hastelloy G-3 /Alloy G-3 / UNS N06985
MOKSH TUBES & FITTINGS LLP is a reliable manufacturer, supplier, exporter, importer, and stockist of ALLOY G-3 (UNS N06985) in various product forms including Pipes & Tubes, Pipe Fittings, Flanges, Fasteners, Sheets & Plates, Coils, Wires, Round Bars, Flat Bars, Angles, Channels, Welding Rods, Wire Mesh, and other customized or special components.
HASTELLOY G3 is a nickel-chromium-iron alloy with additions of molybdenum and copper, specifically designed to resist a broad range of oxidizing and reducing chemicals. It offers excellent resistance to sulfuric acid, phosphoric acid, nitric acid, and other strongly corrosive environments. Its improved weldability and lower sensitivity to thermal cracking (compared to other high-nickel alloys) make it a preferred choice in chemical process and pollution control equipment. The alloy resists intergranular corrosion and maintains strength even after welding.
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Hastelloy G-3 Specifications (UNS N06985)
| Category | Details |
|---|---|
| Grade | Hastelloy G-3 / Alloy G-3 / UNS N06985 |
| Material Type | Nickel–Chromium–Iron Corrosion-Resistant Alloy |
| Key Characteristics | Outstanding resistance to oxidizing and reducing acids |
| Chemical Summary | Ni 47–50%, Cr 20–23.5%, Fe 18–21%, Mo 6–8%, Cu 1.5–2.5% |
| Conditions Available | Annealed, Solution Annealed, Hot Rolled, Cold Worked |
| Heat Treatment | Solution Annealing: 1100–1150°C, rapid cooling |
| Weldability | Excellent; very low sensitivity to weld cracking |
| Corrosion Resistance | Exceptional against sulfuric, phosphoric, nitric & hydrochloric acids |
| Testing Offered | PMI, Chemical Analysis, Tensile, Hardness, UT, NDT |
| Certification | EN 10204 3.1 / 3.2 |
| Standards | ASTM B582, B619, B622, B626 |
Chemical Composition of Hastelloy G-3
| Element | Composition (%) |
|---|---|
| Nickel (Ni) | 47.0 – 50.0 |
| Chromium (Cr) | 20.0 – 23.5 |
| Iron (Fe) | 18.0 – 21.0 |
| Molybdenum (Mo) | 6.0 – 8.0 |
| Copper (Cu) | 1.5 – 2.5 |
| Cobalt (Co) | 5.0 max |
| Manganese (Mn) | 2.0 max |
| Silicon (Si) | 0.6 max |
| Carbon (C) | 0.03 max |
| Sulfur (S) | 0.03 max |
The synergistic combination of chromium, molybdenum, and copper provides Hastelloy G-3 with excellent resistance to both oxidizing and reducing chemical environments.
Mechanical Properties of Hastelloy G-3
| Property | Metric | Imperial |
|---|---|---|
| Tensile Strength | 586 MPa | 85,000 psi |
| Yield Strength (0.2%) | 276 MPa | 40,000 psi |
| Elastic Modulus (RT) | 208 GPa | 30,000 ksi |
| Elongation | 45% | 45% |
| Hardness (Rockwell B) | 88 | 88 |
Products in Hastelloy G3
MOKSH TUBES & FITTINGS LLP, with specialized capabilities in corrosion-resistant materials offers ALLOY G-3 products trusted across demanding industrial sectors. Known for its performance in mixed acid environments and welding stability, G-3 is especially suitable for critical chemical processing systems.
We offer Hastelloy G3 in a wide range of product forms, including:
Uses and Advantages
Excellent corrosion resistance in both oxidizing and reducing acids
Superior resistance to phosphoric, sulfuric, nitric, and hydrochloric acids
Stable mechanical properties after welding or high-heat exposure
Reduced sensitivity to intergranular corrosion and weld cracking
Good formability and fabricability across industrial settings
Long-lasting performance in aggressive chemical service
Applications of Hastelloy G3
HASTELLOY G-3 is a versatile and reliable material used in systems where chemical resistance and weldability are both required. Common applications include:
Chemical Processing Industry
Used in tanks, piping, heat exchangers, valves, and pressure vessels exposed to aggressive acidic media.x`
Pollution Control and Environmental Systems
Applied in flue gas scrubbers, stack liners, and equipment exposed to acid condensates.
Fertilizer and Agricultural Chemical Production
Ideal for handling nitric-phosphoric-sulfuric acid blends and aggressive liquid fertilizers.
Pickling and Acid Regeneration Plants
Used in tanks, ducts, and processing components exposed to concentrated acids.
Waste Treatment Systems
Employed in treatment tanks and pipework in contact with chemical-laden wastewater.
Pharmaceutical and Food Sectors
Used in corrosive environments requiring high-purity and hygienic performance.
HASTELLOY G-3's with its broad-spectrum corrosion resistance and excellent mechanical strength, HASTELLOY G-3 delivers long-term performance in environments where other alloys simply can’t hold up.
WHY CHOOSE US?
FAQ's
What is Hastelloy G-3 and why is it important in industrial applications?
Hastelloy G-3 (UNS N06985) is a nickel-chromium-iron alloy with additions of molybdenum and copper, engineered to resist a broad spectrum of oxidizing and reducing chemicals. It offers excellent resistance to sulfuric acid, nitric acid, phosphoric acid, and hydrochloric acid, making it an ideal material for industries that deal with aggressive chemical environments and require long-term performance.
What are the key properties of Hastelloy G-3 alloy?
Hastelloy G-3 provides outstanding corrosion resistance in both oxidizing and reducing acids while maintaining strength after welding and high heat exposure. It resists intergranular corrosion, has reduced sensitivity to weld cracking, and offers superior mechanical stability with a tensile strength of 95,000 psi and yield strength of 43,000 psi. Its density of 8.22 g/cm³ and excellent formability make it highly adaptable in demanding industries.
Which industries commonly use Hastelloy G-3 products?
Hastelloy G-3 is widely used in the chemical processing industry for tanks, piping, valves, and heat exchangers exposed to mixed acids. It is also applied in pollution control systems such as scrubbers and stack liners, fertilizer production, pickling plants, acid regeneration units, wastewater treatment, and sectors like pharmaceuticals and food processing where both hygiene and chemical resistance are essential.
What types of Hastelloy G-3 products are supplied by MOKSH TUBES & FITTINGS LLP?
MOKSH TUBES & FITTINGS LLP offers a complete range of Hastelloy G-3 products including seamless and welded pipes, tubes, sheets, plates, coils, flanges, fittings, fasteners, round bars, wire mesh, welding rods, and custom-fabricated components. All products are manufactured under strict quality standards to ensure performance, durability, and compliance with international specifications.
Why choose MOKSH TUBES & FITTINGS LLP for Hastelloy G-3 materials?
MOKSH TUBES & FITTINGS LLP is a trusted manufacturer, supplier, exporter, and stockist of Alloy G-3, known for its strong vendor network, large inventory, and global shipping capabilities. With adherence to ASTM and ASME standards, precision fabrication, and expert customer support, the company ensures reliable supply of high performance Hastelloy G-3 products for clients worldwide.
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Moksh Tubes & Fittings LLP for pricing, availability, or technical queries related to HASTELLOY G-3 your dependable partner for corrosion-resistant alloy solutions built to last in the harshest industrial conditions.
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