Alloy 36 Wire UNS K93600

Alloy 36 is a nickel-iron alloy which maintains constant dimensions over the range of normal atmospheric temperatures.

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Fine Wire, Round Wire, Flat Wire, Square Wire, Custom Shaped Wire, Plated Wire and Bare Wire ASTM F1684

Alloy 36 Description Wire Description

Alloy 36 is a nickel-iron alloy which maintains constant dimensions over the range of normal atmospheric temperatures. The alloy has a low coefficient of thermal expansion from cryogenic temperatures up to 500 °F (260 °C).


Standards of length
Measuring devices
Laser components
Bi-metal thermostat strip
Piping for storing and transporting liquefied gases

Chemistry Typical

Nickel: 35.00-37.00
Iron: Balance
Carbon: 0.10 max
Silicon: 0.350 max
Manganese: 0.60 max
Cobalt: 1.00 max
Chromium: 0.50 max
Phosphorus: 0.025 max
Sulfur: 0.025 max
Molybdenum: 0.50 max
Copper: 0.50 max

Physical Properties

Density: 0.293 lb/in³, 8.11 g/cm³

Electrical Resistivity: ohm-cir-mil/ft, microhm-cm:
At 68°F (20°C): 481(80)
At 212°F (100°C): 517(89)
At 392°F (200 °C): 583(97)
At 572°F (300°C): 632(105)
At 752°F (400°C): 668(111)
At 932°F (500°C): 704(117)
At 1112°F (600°C): 728(121)

Thermal Conductivity: BTU-in/hr-ft²-°F (W/m•K)
At 68°F (20°C): 69.3 (10.0)

Mean Coefficient of Thermal Expansion: µin/in-°F (µm/m-°C): Annealed
-328-68°F (-200-20°C): 0.8 (1.5)
-148-68°F (-100-20°C): 0.7 (1.3)
68-212°F (20-100°C): 0.8 (1.5)
68-302°F (20-150°C): 1.1 (2.0)
68-392°F (20-200°C): 1.4 (2.6)
68-482°F (20-250°C): 1.9 (3.5)
68-572°F (20-300°C): 3.1 (5.5)
68-662°F (20-350°C): 4.0 (7.2)
68-752°F (20-400°C): 4.7 (8.4)
68-842°F (20-450°C): 5.2 (9.3)
68-932°F (20-500°C): 5.6 (10.1)

Modulus of Elasticity: KSI (MPa)
20.3 x 10³ (140 x 10³) in tension

Melting Range: 2605°F (1430°C)

Mechanical Properties at Room Temperature

Properties: Annealed Typical

Ultimate Tensile Strength: 71 KSI nom (490 MPa nom)
Yield Strength: 35 KSI nom (241 MPa nom)
Elongation: 42% nom

Properties: Tempered

Alloy 36 can be cold worked to various tempers. Contact Ulbrich Technical Service for additional information

Additional Properties

Corrosion Resistance

Refer to NACE (National Association of Corrosion Engineers) for recommendations
Finishes XC-Extra clean. Bright annealed or bright annealed and cold rolled
Grease-Ultra bright finish for decorative applications
Soap-Soap is not removed from tempered wire to act as a lubricant
* Consult Ulbrich Wire with Special Finish requests.

Heat Treatment

Alloy 36 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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