Forms: Shaped, Flat, Square, Round, Fine Wire, Plated and Un-plated
Specifications: DIN 17471
Alloy 401 is a nickel-copper alloy with a very low coefficient of electrical resistivity and resistance to a wide variety of corrosive conditions. Like with commercially pure Nickel, AAlloy 401 is low in strength in the annealed condition and can only be cold worked to a maximum of 120 KSI.
Specialized electrical and electronic applications
Resistance heaters and circuits
Nickel + Cobalt: 43.0-45.0
Manganese: 2.25 max
Cobalt: 0.25 max
Iron: 0.75 max
Carbon: 0.10 max
Sulfur: 0.015 max
Silicon: 0.25 max
Density: 0.321 lbs/in³, 8.88 g/cm³
Thermal Conductivity: BTU/hr/ft²/ft/°F(W/m•K)
70ºF (21ºC): 13.3 (21.0)
Electrical Resistivity, ohm•circ mil/ft(μΩ•m):
Mean Coefficient of Thermal Expansion: in/in/°F
70-200°: 7.6 x 10-6
70-500°F: 8.5 x 10-6
70-1000°F: 9.2 x 10-6
Modulus of Elasticity: KSI (MPa)
26 x 10³(179 x 10³) in tension
Melting Point: 2335°F (1280°C) approx.
Mechanical Properties at Room Temperature
Properties: Annealed **
Ultimate Tensile Strength: 50-60 KSI (345-414 MPa)
Yield Strength (0.2% offset): 30-40 KSI (207-276 MPa)
Hardness: Rb 60-75
** These values are based on typical capability data and can be adjusted by control of process variables as needed
Alloy 401can be cold rolled to achieve the temper properties required by specific customers and/or manufacturing requirements. Contact Ulbrich Wire for details.
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.
Cut to lengths
Alloy 401 is non hardenable by heat treatment.
For best results refer to: SSINA’s “Welding of Stainless Steels and Other Joining Methods”
*Monel® 401 is a registered trademark of 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.
Copyright January 2014 Ulbrich Stainless Steels & Special Metals, Inc. – Revision 6.1.2015