305 Stainless Steel Wire UNS S30500

Alloy 305 Stainless Steel is an austenitic chromium nickel stainless steel with a low rate of work hardening.

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Shaped, Flat, Square, Round, Fine Wire, Plated and Un-plated Wire AMS 5514, ASTM A240, QQ-S-766

305 Alloy Description

Alloy 305 Stainless Steel is an austenitic chromium nickel stainless steel with a low rate of work hardening. The alloy is non-magnetic
in the annealed condition and but increases at a much slower rate with increasing cold work than other austenitic stainless. This property allows the alloy to be used in many electronic components. The low rate of work hardening makes it suitable for many coining.


Coining applications
Medical devices
Electronic components
Deep draw application
Chemistry Typical
Carbon: 0.12 max
Manganese: 2.00 max
Silicon: 1.00 max
Chromium: 17.00 – 19.00
Nickel: 10.00 – 13.00
Molybdenum: 0.75 max
Phosphorus: 0.040
Sulfur: 0.030 max
Copper: 0.75 max
Iron: Balance

Physical Properties

Density: 0.29 lbs/in³ 7.99 g/cm³

Electrical Resistivity, microhm-in (microhm-cm)
68°F (20°C): 28.4 (74.0)

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

Thermal Conductivity, BTU/hr/ft²/ft/°F (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/°F (μm/m•K)”
32- 212°F (0-100°C): 9.6 x 10 (17.3)
32- 600°F (0-315°C): 9.9 x 10 (17.8)
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
Magnetic Permeability, H = 200 Oersteds Annealed < 1.02
Melting Range, °F (°C) 2550-2650 (1399-1454)

Mechanical Properties

Annealed Typical
Ultimate Tensile Strength: 75 KSI min, 515 MPA min
Yield Strength (0.2% OFFSET): 30 KSI min, 205 MPA min
Elongation: 40% min
Hardness: B92 or equiv. max

Properties Tempered

1/4 Hard
Ultimate Tensile Strength: 120-135 KSI (827-930 MPa)
Yield Strength (.2% offset): 100-120 KSI (589-896 MPa)
Elongation: 15 % nominal
Hardness: Rc 25-30

Full Hard
Ultimate Tensile Strength: 185-225 KSI (1275-1551 MPa)
Yield Strength (.2% offset): 170-210 KSI (1172-1447 MPa)
Elongation: 1-2 %
Hardness: Rc 40-45

305 can be supplied in various rolled to temper conditions. Contact Ulbrich Wire with special mechanical property requests

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 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 requests


Continuous Coils
Cut to lengths
Precision cutting

Cold Forming

Alloy 305 can be readily formed and is considered a good choice for drawn parts.
Heat Treatment
Alloy 305 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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