302 Stainless Steel
Penn Stainless inventory now includes Alloy 302 (UNS S30200) in sheet, sheet coil, plate, round bar, processed flat bar and tubular products.
Alloy 302 is a variations of the 18% chromium / 8% nickel austenitic alloy, which is the most familiar and the most frequently used in the stainless steel family. Alloy 302 is a slightly higher carbon version of 304, often found in strip and wire forms. It is a tough, ductile grade that demonstrates comparable corrosion resistance, is non-magnetic, and is not hardenable by heat treatment. Alloy 302 is usually used in its annealed condition and has a high ease of fabrication and formability.
Specifications: UNS S30200
Although many applications have shifted to 304 and 304L due to advances in melting technology, availability, and cost, Alloy 302 is still used in a variety of industries. Some examples include:
- Wire forming
- Formed into all types of washers, springs, screens, and cables
- Food and beverage industry
- Pressure containing applications
- Sanitary or cryogenic applications
Some examples of products that are partially or completely constructed of 302 include:
- Dish racks
- Washing machines
- ASTM/ASME: UNS S30200
- EURONORM: FeMi35Cr20Cu4Mo2
- DIN: 2.4660
- Provides useful resistance to corrosion on a wide range of moderately oxidizing to moderately reducing environments
- The 18 -19% of chromium which this alloy contains provides resistance to oxidizing environments such as dilute nitric acid.
- Resistant to moderately aggressive organic acids such as acetic, and reducing acids such as phosphoric.
- The 9-11% of nickel contained in this alloy provides resistance to moderately reducing environments.
- Slow speeds and high feeds will overcome this alloy’s tendency to work-harden
- Due to gummy chips, it is recommended that chip breakers are used on all tooling
- Can best be welded by resistance or shielded fusion methods
- Post weld annealing dissolves the chromium carbide and is recommended for maximum resistance to intergranular attack
- Uniform heating to 2100oF will allow this allow to be forged, upset and headed successfully
- Do not work below 1700oF
- Will dramatically increase the hardness of this material; however, it is quite ductile and may readily be drawn, spun and upset
- Causes alloy 302 to become magnetic
- Post-fabrication annealing is necessary to retain maximum corrosion resistance and a non-magnetic condition
|302||max: 0.15||max:2.0||max: 0.75||max: 0.045||max: 0.03||min: 17.0 max: 19.0||min: 8.0 max: 10.0||max: 0.10|
|Grade||Tensile Strength ksi (min)||Yield Strength 0.2% ksi (min)||Elongation %||Hardness (Rockwell B) MAX|
|Density lbm/in3||Thermal Conductivity
(BTU/h ft. °F)
(in x 10(-6))
(psi x 10(6))
°F x 10(-6)
|at 68°F: 0.285||9.4 at 212°F||72.0 at 70°F||28||9.6 at 32 – 212°F||0.1200 at 32°F to 212°F||2500 to 2590|
|12.4 at 932 °F||10.2 at 32 – 1000°F|
|10.4 at 32 – 1500°F|