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:Stamping
Some examples of products that are partially or completely constructed of 302 include:Blenders
Provides useful resistance to corrosion on a wide range of moderately oxidizing to moderately reducing
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.
Post weld annealing dissolves the chromium carbide and is recommended for maximum resistance to
Will dramatically increase the hardness of this material; however, it is quite ductile and may readily be drawn,
spun and upsetCauses alloy 302 to become magnetic
|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|
(BTU/h ft. °F)
(in x 10-6)
(psi x 106
°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|
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