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301 Stainless Steel

Penn Stainless inventory now includes Alloy 301 (UNS S30100) in sheet and sheet coil with short delivery. This grade is inventoried in three conditions: 1/4 hard, 1/2 hard, Full hard.

Overview

General Properties

Stainless steel grade 301 is a commonly available austenitic stainless with good corrosion resistance and elevated carbon to allow for cold working to a variety of tempers. It can be obtained in the 1/4 hard, 1/2 hard, and full hard.

Specifications: S30100

Applications:

High strength and excellent corrosion resistance make Type 301 Stainless Steel useful for a wide variety of applications. Typical uses include:

  • aircraft structural parts
  • trailer bodies
  • utensils
  • architectural and automotive rim
  • roof drainage products
  • conveyor belts
  • variety of industrial applications.

Standards:

  • ASTM/ASME: UNS S30200
  • EURONORM: X 12 CrNi 17 7
  • DIN: 1.4310
Resistance

Corrosion Resistance

  • Good resistance in applications involving external exposure to mildly corrosive conditions at ambient temperatures.
  •  Resists outdoor, industrial, marine, and mild chemical environments
  • susceptible to carbide precipitation during welding, which restricts its use in some applications
  • Similar to resistance of Stainless Steel grade 304

 Heat Resistance

  • Can be exposed continuously without appreciable scaling to a max of  1600°F(871°C).
  • Maximum exposure temperature is about 1450°F (788°C), for intermittent exposure
  • Has an oxidation weight gain of 10mg/cm 2 in 1,000 hours, in temperatures over 1600°F (871°C).
Processing

Heat Treatment

  • Solution Treatment (Annealing) – Heat to 1010-1120°C and cool rapidly.
  • Use low side of range for intermediate annealing.
  • This grade cannot be hardened by thermal treatment.

 Cold Working

  • hardens at high rate, creating a very high strength from cold rolling and from roll forming.
  • more difficult to work than other austenitic stainless steels, due to its high work hardening rate.
  • strain-hardened austenitite steel undergoes partial transformation into martensitite steel during this process.
  • severe cold deformation can still occur, due to residual ductility.
  • Grade 301 becomes strongly magnetic when cold rolled

 Welding

  •  must be annealed for maximum corrosion resistance
  • material will lose temper in the heat affected weld zone.
  • Welding and post weld annealing will both remove high strength induced by prior cold rolling.
  • Spot welding is commonly used to assemble cold rolled 301 components.
Properties

Chemical Properties:

% Cr Ni C Si Mn P S N
301 Min: 16 6 - - - - - -
Max: 18 8 0.15 1.00 2.0 0.045 0.030 0.10

Mechanical Properties:

Grade/Temper Tensile Strength
ksi (min.)		 Yield Strength 0.2%
ksi (min.)		 Elongation -% in 50 mm (min.)
301 1/4 125 75 25
301 1/2 150 110 18
301 Full Hard 185 140 9

 

Physical Properties:

Denstiy lbm/in3 Coefficient of
Thermal Expansion (min/in)-°F		 Electrical Resistivity mW-in Thermal Conductivity BTU/hr-ft-°F Melting Range
0.29 at 68 – 212°F at 68 – 932°F at 68 – 1450°F at 68°F at 212°F at 392°F at 752°F at 1112°F at 1472°F at 68 – 212°F 2550-2590°F
9.2 10.4 10.9 28.3 30.7 33.8 39.4 43.7 47.6 9.4