Nickel Alloy 270 Wire UNS N02270

Alloy 270 is a high purity grade of nickel and has a low base hardness and high ductility. It is essentially free from nonmetallic inclusions.

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Shaped, Flat, Square, Round, Fine Wire, Plated and Un-plated ASTM F3

Alloy 270 Wire Description

Alloy 270 is a high purity grade of nickel and has a low base hardness and high ductility. It is essentially free from nonmetallic inclusions. This alloy is typically made by powder metallurgy.


Fluorescent lamp components
Electrical resistance thermometers
Hydrogen thyatron components
Platter bars
Passive cathode

Chemistry Typical

Nickel + Cobalt: 99.9 min
Copper: 0.01 max
Iron: 0.05 max
Manganese: 0.003 max
Carbon: 0.02 max
Sulfur: 0.003 max
Titanium:.005 max
Magnesium: 0.005 max
Silicon: 0.005 max

Physical Properties

Density: 0.322 lb/in³, 8.91 g/cm³

Electrical Resistivity: ohm-cir-mil/ft,(μohm•m): 45.0 (0.075)

Specific Heat: BTU/lb-°F (J/g-°K): 0.110 (460)

Thermal Conductivity: BTU-in/hr-ft²-°F (W/m•-°C): 595(86)

Magnetic Permeability: Ferromagnetic

Mean Coefficient of Thermal Expansion: µin/in-°F (µm/m-°C) 70-200°F (20-95°C): 7.4(13.3)

Modulus of Elasticity: KSI (MPa) 30 x 10³ (207 x 10³) in tension

Melting Point: 2650°F (1454°C)

Mechanical Properties at Room Temperature

Properties: Annealed Typical

Ultimate Tensile Strength: 50 KSI min (345MPa min)
Yield Strength: 16 KSI min (110 MPa min )
Elongation: 50 % min
Hardness: Rb 66 max: gauges ≥ 0.010 inches

Properties Tempered

Alloy 270 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 270 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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