304V Stainless Steel Wire UNS S30400

Alloy 304V is a double melted austenitic stainless steel wire.

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Shaped, Flat, Square, Round, Fine Wire, Plated and Bare Wire ASTM A276, ASTM A313, ASTM A666

304V Alloy Description

Alloy 304V is a double melted austenitic stainless steel wire. The alloy is initially electric-arc melted followed by a Vacuum Arc Re-melt (VAR). This melting practice minimizes voids and contaminants while yielding a more uniform chemistry. This refinement to the purity and homogeneity of the metal allows for use in high reliability products.


Orthodontic arc wire
Guide wires
Surgical instruments
Surgical implant

Chemistry Typical

Carbon: 0.08 Max
Manganese: 2.00 max
Phosphorus: 0.040 max
Sulfur: 0.030 max
Silicon: 1.00 max
Chromium: 18.00- 20.00
Nickel: 8.00- 10.50
Copper: 0.75 max
Molybdenum: 0.75 max
Iron: Balance

Physical Properties

Density: 0.29 lbs/in³ 8.03 g/cm³

Electrical Resistivity microhm-in (microhm-cm)
At °F (20°C): 28.4 (72)
At 1200°F (659°C): 45.8 (116)

Specific Heat, BTU/lb/oF (kJ/kg•K) 32-212°F (0-100°C): 0.12 (0.50)

Thermal Conductivity, BTU/hr/ft²/ft/oF (W/m•K)
At 212°F (100°C): 9.4 (16.2)
At 932°F (500°C): 12.4 (21.4)

Mean Coefficient of Thermal Expansion, in/in/oF(μm/m•K)
32-212°F (0-100°C): 9.4 x 10 (16.9)
32-600°F (0-315°C): 9.6 x 10 (17.3)
32-1000°F (0-538°C):10.2 x 10 (18.4)
32-1200°F (0-649°C):10.4 x 10 (18.7)

Modulus of Elasticity, KSI (MPa)
28.0 x 10³ (193 x 10³) in tension
11.2 x 10³ (78 x 10³) in torsion

Magnetic Permeability, H = 200 Oersteds

Annealed: 1.02 max

Melting Range: °F (°C): 2550 – 2650 (1399 – 1454)

Mechanical Properties at Room Temperature

Ultimate Tensile Strength: 75 KSI min (517 MPa min)
Yield Strength (0.2% Offset): 30 KSI min (205 MPa min)
Elongation: 40% min
Hardness: B92 max


Alloy 304V can be supplied in a various rolled tempered conditions. Contact Ulbrich
Technical Service for details.

*Alloy 304V can be cold worked to extremely high tensile strengths. Contact Ulbrich
Technical Service for details

Additional Properties

Corrosion Resistance

Alloy 304V stainless steel wire has excellent corrosion resistance and is used in many corrosive environments and atmospheres. Please 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 andis 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


Continuous Coils
Cut to lengths
Precision cutting

Cold Forming

Alloy 304V is ductile and can be cold worked by stamping, drawing, bending or forming

Heat Treatment

Alloy 304V can only be hardened by cold working.


Refer to SSINA’s ‘Welding of Stainless Steels and Other Joining Methods’ for best practices.

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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