301 Stainless Steel Wire UNS S30100

Type 301 is an austenitic stainless steel wire capable of attaining high strengths and ductility by cold working.

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301 Stainless Shaped, Flat, Square, Round, Fine Wire, Plated and Un-plated Wire AMS 5518 AMS 5519, AMS 5901, AMS 5902, AMS 5901, AMS 5902, ASTM A240, ASTM A666

301 Alloy Description

Type 301 is an austenitic stainless steel wire capable of attaining high strengths and ductility by cold working. It is not hardenable by heat treatment. Type 301 is non-magnetic in the annealed condition and becomes increasingly magnetic with cold working. It is preferable over types 302 and 304 in the tempered condition because the higher elongations (which are attainable at a given strength level) facilitate fabrication

301 Stainless Steel Wire Applications

Chemistry Typical

  • Carbon: 0.15 max
  • Manganese: 2.00 max
  • Silicon: 1.00 max
  • Chromium: 16.00- 18.00
  • Nickel: 6.00- 8.00
  • Aluminum: 0.75 max
  • Phosphorus: 0.040 max
  • Sulfur: 0.030 max
  • Copper: 0.75 max
  • Nitrogen: 0.10 max
  • Iron: Balance

Physical Properties

Density: 0.285 lbs/in³, 7.88 g/cm³

Electrical Resistivity: microhm-in (microhm-cm):
At 68°F (20°C): 27.4 (69.5)

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): 9.4 x 10 (16.9)
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) 10-6

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 = 200Oersteds Annealed: 1.02 max.

Melting Range: °F (°C) 2250 – 2590 (1399 – 1421)

Mechanical Properties at Room Temperature

Properties: Annealed

Ultimate Tensile Strength: 75 KSI min (930 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: 125 KSI min (860 MPA min)
Yield Strength: (0.2% Offset) 75 KSI min (930 MPA min)
Elongation: 25% min

1/2 Hard

Ultimate Tensile Strength: 150 KSI min (1035 MPa min)
Yield Strength: (0.2% Offset) 110 KSI min (760 MPa min)
15% min for gauges < 0.015 inches
18%min for gauges > 0.015 inches

3/4 Hard

Ultimate Tensile Strength: 175 KSI min (1205 MPa min)
Yield Strength: (0.2% Offset) 125 KSI min (931 MPamin)
10% min for gauges < 0.015 inches
12% min for gauges > 0.015 inches

Full Hard

Ultimate Tensile Strength: 185 KSI min (1275 MPa min)
Yield Strength: (0.2% Offset) 140 KSI min (965 MPa min)
8% min for gauges < 0.015 inches
9% min for gauges > 0.015 inches
Alloy 301 can be rolled to high mechanical properties than full hard. Contact Ulbrich Wire with special mechanical property requests

Additional Properties

Corrosion Resistance

301 stainless steel wire has good corrosion resistance and is used in many food service applications, similar to grade 304. Please 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 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
301 is ductile and easily formed but severe forming or multiple operations may require
intermediate anneals due to it’s high work hardening rate. It’s hardness and strength makes
it a fit for structural applications. Typically stamped or drawn

Heat Treatment

301 is non hardenable by heat treatment

Stress Relieving

Heat to 400-900°F (260-482°C) and then air cool

Welding 301 Stainless Steel Wire

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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