301 Stainless Steel

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:

1. aircraft structural parts

2. trailer bodies

3. utensils

4. architectural and automotive rim

5. roof drainage products

6. conveyor belts

7. variety of industrial applications.

Standards:

1. ASTM/ASME: UNS S30200

2. EURONORM: X 12 CrNi 17 7

3. DIN: 1.4310

Corrosion Resistance

1. Good resistance in applications involving external exposure to mildly corrosive conditions at ambient temperatures.

2.  Resists outdoor, industrial, marine, and mild chemical environments

3. susceptible to carbide precipitation during welding, which restricts its use in some applications

4. Similar to resistance of Stainless Steel grade 304

 Heat Resistance

1. Can be exposed continuously without appreciable scaling to a max of  1600°F(871°C).

2. Maximum exposure temperature is about 1450°F (788°C), for intermittent exposure

3. Has an oxidation weight gain of 10mg/cm 2 in 1,000 hours, in temperatures over 1600°F (871°C).

Heat Treatment

1. Solution Treatment (Annealing) – Heat to 1010-1120°C and cool rapidly.

2. Use low side of range for intermediate annealing.

3. This grade cannot be hardened by thermal treatment.

 Cold Working

1. hardens at high rate, creating a very high strength from cold rolling and from roll forming.

2. more difficult to work than other austenitic stainless steels, due to its high work hardening rate.

3. strain-hardened austenitite steel undergoes partial transformation into martensitite steel during this process.

4. severe cold deformation can still occur, due to residual ductility.

5. Grade 301 becomes strongly magnetic when cold rolled

 Welding

1.  must be annealed for maximum corrosion resistance

2. material will lose temper in the heat affected weld zone.

3. Welding and post weld annealing will both remove high strength induced by prior cold rolling.

4. Spot welding is commonly used to assemble cold rolled 301 components.

Chemical Properties:

%

Cr

Ni

C

Si

Mn

P

S

N301Min:166–––––

–Max: 18 80.15 1.002.0 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 1/41257525301 1/215011018301 Full Hard1851409

Physical Properties:

Denstiy

lbm/in3

Coefficient of

Thermal Expansion (min/in)-°F

Electrical Resistivity mW-in

Thermal Conductivity BTU/hr-ft-°F

Melting

Range0.29at 68 – 212°Fat 68 – 932°Fat 68 – 1450°Fat 68°Fat 212°Fat 392°Fat 752°Fat 1112°Fat 1472°Fat 68 – 212°F 2550-2590°F9.210.410.928.330.733.839.443.747.69.4