Permanickel® 300 Wire UNS N03300

Permanickel® 300 is an age-hardenable super alloy with a maximum carbon level of 0.4% with additions of magnesium and titanium.

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Shaped, Flat, Square, Round, Fine Wire, Plated and Bare Wire ASTM F290

Permanickel® 300 Description

Permanickel® 300 is an age-hardenable super alloy with a maximum carbon level of 0.4% with additions of magnesium and titanium. This alloy provides high thermal and electrical conductivity.


Electrical contacts
Electrical springs

Chemistry Typical

Nickel + Cobalt: 97 min
Carbon: 0.40 max
Silicon: 0.35 max
Manganese: 0.50 max
Magnesium: 0.2-0.5
Titanium: 0.2-0.6
Sulfur: 0.010 max
Iron: 0.6 max
Copper: 0.25 max

Physical Properties

Density, 0.316 lbs/in³, 8.74 g/cm³

Thermal Conductivity, BTU/hr/ft²/ft/°F (W/m•K)
212ºF (100ºC)- 400 (16.2)

Mean Coefficient of Thermal Expansion, in/in/°F (μm/m•K):
32- 212°F: 6.8 x 10-6 (16.5)

Modulus of Elasticity,KSI (MPa)
30.0x 10³ (207 x 10³) in tension

Melting Point: 2600°F (1427°C)

Mechanical Properties at Room Temperature

Properties: Annealed

Ultimate Tensile Strength: 90 – 120 KSI
Yield Strength (0.2% offset): 35 – 60 KSI
Elongation: 25-50%
Hardness: Rb 90 max

Properties Tempered

Permanickel® 300 can be cold rolled to achieve the temper properties required by specific customers and/or manufacturing requirements. Contact Ulbrich Wire for details.

Annealed & Aged

Ultimate Tensile Strength: 150-190 KSI
Elongation: 10 -20%
Hardness: Rc 30-40

Half Hard
Ultimate Tensile Strength: 130-155 KSI
Elongation: 3-15%
Hardness: Rc 25-34

Half Hard & Aged
Ultimate Tensile Strength: 170-210 KSI
Elongation: 1-20%
Hardness: Rc 33-42

Spring Temper
Ultimate Tensile Strength: 150-190 KSI
Elongation: 2-10%
Hardness: Rc 30-40

Spring Temper & Aged
Ultimate Tensile Strength: 180-230 KSI
Elongation: 5-15%
Hardness: Rc 36-46

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
Cold Forming
Permanickel® 300 can be easily formed by conventional method.

Heat Treatment

Permanickel® 300can be hardened by cold working and by heat treating.


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

Permanickel® 300 is a registered trademark of the Special Metals Corp

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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