330 Stainless Steel Wire UNS N08330

Alloy 330 stainless is an austenitic heat and corrosion resisting alloy that offers a combination of strength and resistance to carburization, oxidation and thermal shock.

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Shaped, Flat, Square, Round, Fine, Plated, and Bare Wire AMS 5592, AMS 5716, ASTM B 511, ASTM B 512, ASTM B 535, ASTM B 536, ASTM B 546, ASTM B 710, ASTM B 739

330 Alloy Description

Alloy 330 stainless is an austenitic heat and corrosion resisting alloy that offers a combination of strength and resistance to carburization, oxidation and thermal shock. Carburization and oxidation resistance to about 2100°F are enhanced by the silicon content of the alloy. Alloy 330 stainless remains fully austenitic at all temperatures. This alloy was designed for applications in high temperature industrial environments where good resistance to the combined effects of carburization and thermal cycling are required.


Heat exchangers
Furnace parts, muffles and retorts, annealing covers
Food processing equipment
Cryogenic structures

Chemistry Typical

Carbon: 0.08 max
Phosphorus: 0.030 max
Silicon: 0.75-1.50 max
Nickel: 34.00-37.00
Manganese: 2.00 max
Sulfur: 0.030 max
Chromium: 17.00-20.00
Molybdenum: 0.75 max
Copper: 0.50 max
Iron: Balance

Physical Properties

Density: .289 lb/in³, 8.00 g/cm³

Electrical Resistivity: ohm-cm
At 68 °F (20°C): 0.000102
At 797°F (425°C): 0.00014

Thermal Conductivity: BTU-in/hr-ft²-°F (W/m•K):
At 75°F (24°C): 86.8 (12.5)
At 212°F (100°C): 113 (16.3)
At 797°F (425°C): 135 (19.4)
At 932°F (500°C): 150 (21.6)
At 1600°F (870°C): 198 (28.5)

Mean Coefficient of Thermal Expansion: µin/in-°F (µm/m-°C)
32.0-212°F (0-100 °C): 8.00 (14.4)
32.0-599°F (0-315 °C): 8.89 (16.0)
32.0-1000°F (0-540 °C): 9.28 (16.7)
32.0-1200°F (0-650 °C): 9.61 (17.3)
32.0-1600°F (0-870 °C): 10.0 (18.0)

Modulus of Elasticity: KSI (MPa)
28.6 x 10³ (197 x 10³) in tension

Magnetic Permeability, H = 200: Annealed ≤ 1.02

Melting Range: °F (°C): 2550-2597(1400-1425)

Mechanical Properties at Room Temperature

Properties: Annealed Typical

Ultimate Tensile Strength: 85 KSI (585 MPa min)
Yield Strength: 42 KSI min (290MPa min )
Elongation: 45 % min

Properties Tempered

Alloy 330 can 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

Refer to NACE (National Association of Corrosion Engineers) for recommendations.

Standard Wire Finishes

Extra Clean: (XC) 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

Heat Treatment

Alloy 330 is non hardenable by heat treatment.


For best results refer to: SSINA’s “Welding of Stainless Steels and Other Joining Methods

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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