Shaped, Flat, Square, Round, Fine Wire, Plated and Un-plated ASTM B581, ASTM B582

Hastelloy® G30 Description

With higher chromium, added cobalt and tungsten alloy G30 is an improved version of nickel-chromium-ironmolybdenum-copper alloy G-3. G-30 shows superior corrosion resistance over most other nickel and iron based alloys in commercial phosphoric acids as well as complex environments containing highly oxidizing acids. The resistance of the alloy to the formation of grain boundary precipitates in the heat-affected zone makes it suitable for use in most chemical process applications in the as-welded condition.


Components used in contact with phosphoric, sulfuric and nitric acid
Components used in nuclear fuel reprocessing and nuclear waste processing
Components used in the production of pesticides, fertilizers and petrochemicals
Components used in contact with phosphoric, sulfuric and nitric acids

Chemistry Typical

Nickel: Balance
Chromium: 28.00 – 31.50
Iron: 13.00 – 17.00
Molybdenum: 4.00 – 6.00
Copper: 1.00 – 2.40
Tungsten: 1.5-4.0
Cobalt: 5.00 max
Manganese: 1.50 max
Columbium + Tantalum: 0.30-1.50
Carbon: 0.03 max
Phosphorus: 0.04 max
Silicon: 0.80 max
Sulfur: 0.02 max

Physical Properties

Density: 0.297 lbs/in³, 8.22 g/cm³

Mean Coefficient of Thermal Expansion: in/in/°F (mm/m/°C): 70- 212°F (20- 100°C): 7.1 x 10 (12.8)

Thermal Conductivity: BTU-in/h-ft-°F (W/m-°K): 70°F (21°C):71(10.2)

Modulus of Elasticity: KSI (MPa) 29.3 x 10³ (202 x 10³) in tension

Melting Point (approximate): 2550°F (1399°C)

Mechanical Properties at Room Temperature

Annealed Typical

Ultimate Tensile Strength: 85 KSI min (586 MPa min)
Yield Strength: (0.2% offset) 35 KSI min (241 MPa min)
Elongation: 30% min

Properties Tempered

Alloy G-30can be cold rolled to achieve the temper properties required by specific customers and/or manufacturing requirements. Contact Ulbrich Wire for details.

Additional Properties

Corrosion Resistance

Alloy G-30 shows superior corrosion resistance in commercial phosphoric acids as well as complex environments containing highly oxidizing acids such as nitric/hydrochloric, nitric/hydrofluoric and sulfuric acids. Refer to NACE (National Association of Corrosion Engineers) for recommendations
Standard Wire Finishes Extra Clean: Extra clean is also referred to as “bright annealed” or “bright annealed and cold rolled”

Grease (round wire only): Drawn in a heavy grease produces an “Ultra bright” finish for decorative applications

Soap (round wire only): Soap is used as a lubricant in the drawing process and is not removed. It acts as a lubricant during customer part forming operation.

A soap finish is available in tempered products.
Plated: Many plating options are available.
*Special finishes are available: Contact Ulbrich Wire Sales with special finish and plating requests.


Continuous Coils
Cut to lengths
Precision cutting
Cold Forming
Alloy G-30 has good ductility and may be formed by conventional methods

Heat Treatment

Alloy G30 can be hardened by cold working:


For best results refer to: SSINA’s “Welding of Stainless Steels and Other Joining Methods”
Hastelloy® G-30 is a registered trademark of Haynes Alloys

Limitation of Liability and Disclaimer of Warranty: In no event will Ulbrich Stainless Steels and Special Metals, Inc., be liable for any damages arising from the use of the information included in this document or that it is suitable for the ‘applications’ noted. We believe the information and data provided to be accurate to the best of our knowledge but, all data is considered typical values only. It is intended for reference and general information and not recommended for specification, design or engineering purposes. Ulbrich assumes no implied or express warranty in regard to the creation or accuracy of the data provided in this document.

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