301 Stainless Steel

Description:

Type 301 Stainless Steel is an austenitic chromium-nickel stainless steel that provides high strength and good ductility when cold worked. The chromium and nickel contents are lowered to increase the cold work-hardening rate. This generates higher tensile strengths when cold rolled with a lower loss of ductility than with Types 302 and 304. The grade is essentially non-magnetic when annealed. When cold worked, it becomes slightly more magnetic than other standard austenitic stainless steels. NKS is your stainless steel distributor for 301 Stainless Steel.

Product Forms:

Sheet, Strip

Specifications:

ASTM A240, A666 Typical

Applications:

Typical uses include springs, structural parts, trailer bodies, diaphragms, utensils, architectural and automotive trim, hose clamps, wheel covers, roofing products, kitchen utensils

Chemical Composition:

ElementType
Carbon 0.15 max.
Manganese 2.00 max.
Sulfur 0.030 max.
Phosphorus 0.045 max.
Silicon 0.75 max.
Chromium 16.00 – 18.00
Nickel 6.00 – 8.00
Nitrogen 0.10 max.

Mechanical Properties:

TypeYield Strength 0.2% offset (KSI)Tensile Strength (KSI)% Elongation (2" Gauge length)Hardness Rockwell
301 Ann (typical) 40 110 min. 60 HRB 85
301 ¼ Hard 75 min. 125 min. 25 min. HRC 25 - 32(typical)
301 ½ Hard 110 min. 150 min. 18 min. HRC 32 - 37(typical)
301 ¾ Hard 135 min. 175 min. 12 min. HRC 37 - 41(typical)
301 Full Hard 145 min. 185 min. 8 min HRC 41 - 46(typical)

Physical Properties:

Density (lb./ in^2) @ RT   0.285
Modulus of Elasticity in Tension (psi x 10^6)   28.0
Specific Heat (BTU/o F/lb.) 32 to 212 oF 0.12
Thermal Conductivity (BTU/hr/ft^2/ft) 212oF 9.4
  932oF 12.4
Mean Coefficient of Thermal Expansion (in. x 10^-6 per o F) 32 to 212oF 9.4
  32 to 600oF 9.9
  32 to 1,000oF 10.2
  32 to 1,200oF 10.4
Electrical Resistivity (micro ohms - cm) at 70oF 27.4
Melting Point Range (oF)   2550 - 2590
Oxidation Resistance - Continuous Service(oF)   1600
Oxidation Resistance - Intermittent Service(oF)   1450

Processing:

Type 301 is non-hardenable by heat treatment. Annealing: Heat to 1900 - 2050°F (1038 - 1121°C), then water quench. Stress Relief Annealing: Heat to 500 - 900°F (260 - 482°C), then air cool.

Forming:

Type 301 can be formed and drawn. Due to its high work-hardening rate, intermediate annealing may be necessary for severe drawing and forming operations.

Welding:

301 has similar weldability to the most common 18-8 stainless alloys. The major difference is the high C content of this alloy, which causes the weld heat affected-zones to be susceptible to accelerated corrosion in certain environments. When filler is needed, AWS E/ER 308 is most often specified.

Corrosion:

Type 301 exhibits corrosion resistance comparable to Types 302 and 304 in the mild service conditions. Resistance to atmospheric corrosion, food, juices and road de-icing salt is excellent. The best corrosion resistance is obtained in the annealed condition.