430 stainless steel sheet metal is a slightly lower grade than the 300 series and is commonly used for applications when the metal needs to hold a magnet, which the 300 series does not. 430 stainless steel sheet #4 finish is slightly more susceptible to corrosion since it does not contain nickel or molybdenum like the 300 series. Common uses are for 430 stainless steel sheet #4 finish are automotive trim, kitchen appliances, sinks, decorative trim and any other application that requires stainless steel that will hold a magnet. This metal will hold a magnet, but not act as a magnet.
CHEMICAL PROPERTIES
| C | MN | P | S | SI | CR | NI |
|---|---|---|---|---|---|---|
| 0.12% max | 1.00% max | 0.04% | 0.03% max | 1.00% max | 16 - 18% | 0.75% |
MECHANICAL PROPERTIES
| MECHANICAL PROPERTIES | ||
|---|---|---|
| Metric | Imperial | |
| Tensile Strength, Ultimate | 450 MPa | 65 ksi |
| Tensile Strength, Yield | 205 MPa | 30 ksi |
| Elongation at Break (in 2") | 22% | 22% |
| Rockwell Hardness | B89 | B89 |
CORROSION RESISTANCE
Grade 430 has good resistance to a wide variety of corrosive enviornments, including nitric acid and some organic acids. It attains its maximum corrosion resistance when in the highly polished or buffed condition. In general its resistance to pitting and crevice corrosion resistance is close to that of grade 304. Stress corrosion cracking resistance of Grade 430 is very high, as it is for all ferritic grades.
Like other high-sulphur free machining grades 430F has much reduced resistance to pitting and crevice corrosion compared to its non-free machining equivalent.
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