Alloy 42-6 Wire UNS K94760

Alloy 42-6 was developed to match the thermal expansion characteristics of 0120 glass.

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Shaped, Flat, Square, Round, Fine Wire, Plated and Bare Wire ASTM F31

Alloy 42-6 Description

Alloy 42-6 was developed to match the thermal expansion characteristics of 0120 glass. An additional advantage of this alloy for glass-to-metals seals is the tight dark green oxide coating formed by wet hydrogen annealing at 1900/2200°F (1038/1204°C) for one hour.


Compression seals
Electronic components

Chemistry Typical

Carbon: 0.07 max
Silicon: 0.30 max
Manganese: 0.25 max
Nickel: 42 nom
Chromium: 5.6 nom
Iron: Balance
Phosphorus: 0.025 max
Sulfur: 0.025 max
Aluminum: 0.20 max

Physical Properties

Density: 0.29 lb/in³, 8.2 g/cm3

Mean Coefficient of Thermal Expansion: µin/in-°F (µm/m-°C):
77-212°F (25-100°C): 1.12 (2.20)

Melting Point: 2600°F (1430°C)

Mechanical Properties at Room Temperature

Properties: Annealed Typical

Ultimate Tensile Strength: 80 KSI nom (550 MPa nom)

Yield Strength: 41 KSI nom (282 MPa nom)

Elongation: 30% nom

Hardness: Rb 71 nom

Properties Tempered

Alloy 42-6can 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 42-6 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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