The Type 302, 304, 304L and 305 alloys are the most susceptible of the austenitic stainless steels to stress corrosion cracking in halides because of their relatively low nickel content. Conditions which cause stress corrosion cracking are: (1) presence of halide ions (generally chloride), (2) residual tensile stresses, and (3) temperatures in excess of about 120°F (49°C).
Standards
Typical standards for Type 302 stainless steel
| 302 |
| ASTM A240 |
| ASTM A666 |
| ASME SA240 |
| AMS 5515 (annealed) |
| AMS 5516 (annealed) |
| AMS 5903 (¼ hard) |
| AMS 5904 (½ hard) |
| AMS 5905 (¾ hard) |
| AMS 5906 (full hard) |
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.
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