444 Stainless Steel Wire UNS S44400

Shaped, Flat, Square, Round, Fine Wire, Plated and Un-plated ASTM A-240, ASTM A-276, ASTM A-479, ASTM A-580

444 Alloy Description

Alloy 444 is a low carbon, low nitrogen, ferritic stainless steel that provides superior pitting and crevice corrosion resistance to most ferritic stainless steels.

Applications

Screens used in the food processing industry
Brewery and wine making equipment
Heat-exchanger components Automotive components

Chemistry Typical

Carbon: 0.025 max
Manganese: 1.00 max
Silicon: 0.60
Chromium: 17.50-19.50
Nickel: 01.00 max
Molybdenum: 1.75-2.50
Titanium + Columbium : 0.20 + 4x (Carbon +Nitrogen) min-0.80 max
Phosphorus: 0.040 max
Sulfur: 0.030 max
Iron: Balance

Physical Properties

Density: 0.280 lbs/in³, 7.75 g/cm³

Electrical Resistivity: microhm-in (microhm-cm):
68°F (20°C): 22.50 (57)

Specific Heat, BTU/lb/°F (kJ/kg•K):
32-212°F (0-100°C): 0.102 (0.427)

Thermal Conductivity: BTU/hr/ft²/ft/°F (W/m•K):
At 212°F (100°C): 15.5 (26.8)

Mean Coefficient of Thermal Expansion: in/in/°F (μm/m•K)
32-212°F (0-100°C): 6.1 x 10 (11.0)

Modulus of Elasticity: KSI (MPa)
29.0 x 10³ (200 x 10³) in tension

Magnetic Permeability: Magnetic

Melting Range: °F (°C) 2700-2790 (1482-1532)

Mechanical Properties at Room Temperature

Properties: Annealed

Ultimate Tensile Strength: 60 KSI min (414 MPa min)
Yield Strength: (0.2% Offset) 40 KSI min (276 MPa min)
Elongation: 20% min
Hardness: Rb 90 max

Properties: Tempered

Alloy 444 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: 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.

Forms

Continuous Coils
Cut to lengths
Precision cutting

Heat Treatment

Alloy 444 is non-heat treatable

Welding

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