201 Stainless Steel UNS S20100

Strip, Coil, Foil & Wire, ASTM A666, ASTM A240

Applications

• Springs
• Fasteners
• Utensils
• Food Service
• Appliances
• Automotive Trim
• Clamps

Description

Type 201 stainless steel is an austenitic chromium-nickel-manganese stainless alloy. It was developed mid century to conserve nickel and it is used as an alternative to type 301 in some tempered applications. Because of 201 's relatively high yield strength in the annealed condition, use of 201 is limited. Type 201 is generally used in the tempered condition particularly for springs and fasteners. 201 Stainless will retain a comparable ductility to 301 even with the higher yield strength.

Chemistry Typical

Carbon: 0.15 max Manganese: 5.50- 7 .50 max Phosphorus: 0.060 max Sulfur: 0.030 max Silicon: 0.75 max Chromium: 18.00- 20.00 max Nickel: 3.50- 5.50 Nitrogen: 0.25 max Iron: Balance

Physical Properties of 201 Stainless Steel

Density: 0.283 lbs/in3 7.81 g/cm3 Electrical Resistivity: microhm-in, (microhm-cm): 27.0 (68.5)

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

Thermal Conductivity, BTU/hr/ft/ft2/° 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.fin./ °F (µm/m/K)) 32 - 212 °F (0 - 100 °C) 8.7 x 10-5 (15.7) 32 - 600 °F (0 - 315 °C) 9.7 x 10-6 (17.5) 32 - 1000 °F (0 - 538 °C) 10.2 x 10-5 (18.4) 32 - 1200 °F (0 - 649 °C) 10.5 x 10-5 (18.9) 32 - 1600 °F (0 - 871 °C) 11.3 x 1 o-6 (20.3) Modulus of Elasticity, ksi (MPa) 28.6 X 103 (197 X 103) Magnetic Permeability, H=200 Oersteds: Annealed < 1.02 max Melting Range: 2550 - 2650 °F (1399 - 1454 °C)

Forms

Coil

• Strip
• Foil
• Ribbon

Wire

• Profile
• Round
• Flat
• Square

Mechanical Properties of 201 Stainless Steel at Room Temperature

Annealed Condition

Ultimate Tensile Strength: 95 KSI min (655 MPA min) Yield Strength (0.2% Offset): 38 KSI min (260 MPA min) Elongation: 40%min Hardness: B95 max

Tempered 1/16 Hard

Ultimate Tensile Strength: 95 KSI min (655 MPA min) Yield Strength (0.2% Offset): 45 KSI min (310 MPA min) Elongation: 40% min

Tempered 1/8 Hard Ultimate Tensile Strength: 100 KSI min (690 MPA min) Yield Strength (0.2% Offset): 55 KSI min (380 MPA min) Elongation: 45% min

Tempered 1/4 Hard

Ultimate Tensile Strength: 125 KSI min (860 MPA min) Yield Strength (0.2% Offset): 75 KSI min (515 MPA min) Elongation: 25% min

Tempered 1/2 Hard

Ultimate Tensile Strength: 150 KSI min (1035 MPA min) Yield Strength (0.2% Offset): 110 KSI min (760 MPA min) Elongation: 15% < 0.15" 18% > 0.15"

Tempered 3/4 Hard

Ultimate Tensile Strength: 175 KSI min (1205 MPA min) Yield Strength (0.2% Offset): 135 KSI min (930 MPA min) Elongation: 10% < 0.15" 12% > 0.15"

Tempered Full Hard

Ultimate Tensile Strength: 185 KSI min (1275 MPA min) Yield Strength (0.2% Offset): 140 KSI min (965 MPA min) Elongation: 8% < 0.15" 9% > 0.15"

Additional Properties

Corrosion Resistance of 201 Stainless Steel

Refer to NACE (National Associate of Corrosion Engineers) for recommendations.

201 Stainless Steel Finishes for Strip & Foil

#1 - Hot rolled annealed and descaled. It is available in strip, foil and ribbon. It is used for applications where a smooth decorative finish is not required. #2D - Dull finish produced by cold rolling, annealing and descaling. Used for deep drawn parts and those parts that need to retain lubricants in the forming process. #2B - Smooth finish produced by cold rolling, annealing and descaling. A light cold rolling pass is added after anneal with polished rolls giving it a brighter finish than 2D. #BA- Bright annealed cold rolled and bright annealed #CBA- Course bright annealed cold rolled matte finish and bright anneal #2 - Cold Rolled #2BA- Smooth finish produced by cold rolling and bright annealing. A light pass using highly polished rolls produces a glossy finish. A 2BA finish may be used for lightly formed applications where a glossy finish is desired in the formed part. Polished - Various grit finish for specific polish finished requirements. * Not all finishes are available for all alloys - Please contact Ulbrich sales for more information.

Finishes - Wire

XC - Extra Clean Bright Annealed or Bright Annealed and Cold Rolled Grease - Ultra bright finish (for decorative applications) Soap - Soap coating on tempered wire to act as lubricant * Contact Ulbrich Wire with special wire finishes.

Cold Forming 201 Stainless Steel

201 is considered a formable stainless and is often drawn, stamped and headed. It work hardens easily and should be followed by anneal.

201 Stainless Steel Heat Treatment

201 cannot be heat treated for hardness. Hardness can only be achieved by cold working.

Welding 201 Stainless Steel

Refer SSINA for Welding Recommendations.

Limitation of Liability and Disclaimer of Warranty: In no event will Ulbrich Stainless Steels & 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.