| Grade | Tensile Str min ( MPa ) |
Yield Str 0.2% Proof ( MPa ) |
Elong (% in 50 mm) min |
Hardness | |
|---|---|---|---|---|---|
| Rockwell B max ( HR B ) |
Brinell max ( HB ) |
||||
| 430 | 483 | 310 | 22 | 85 | 183 |
| 430 F | 552 typical | 379 typical | 25 typical | – | 262 |
| Grade | Density ( kg/m3 ) |
Elastic Modulus ( GPa ) |
Mean Co-eff of Thermal Expansion ( µm/m/˚C ) |
Thermal Conductivity ( W/m.k ) |
Specific Heat 0-100 ˚C (J/kg.K) |
Elec Resistivity ( nΩ.m ) |
|||
|---|---|---|---|---|---|---|---|---|---|
| 0-100 ˚C |
0-315 ˚C |
0-538 ˚C |
At 100 ˚C |
At 500 ˚C |
|||||
| 430 | 7750 | 200 | 10.4 | 11 | 11.4 | 26.1 | 26.3 | 460 | 600 |
| 430 F | 7750 | 200 | 10.4 | 11 | 11.4 | 26.1 | 26.3 | 460 | 600 |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
|---|---|---|---|---|---|---|---|---|---|---|
| 430 | Min | – | – | – | – | – | 16.0 | – | – | – |
| Max | 0.12 | 1 | 1 | 0.04 | 0.03 | 18.0 | – | 0.5 | – | |
| 430 F | Min | – | – | – | – | 0.15 | 16.0 | – | – | – |
| Max | 0.12 | 1.25 | 1 | 0.06 | – | 18.0 | – | – | – |
| Grade | Reason |
|---|---|
| 430F | Higher machinability than 430 is needed in bar product, and reduced corrosion resistance is acceptable. |
| 434 | Better pitting resistance is required. |
| 304 | Slightly higher corrosion resistance is needed, together with greatly improved ability to be welded and cold formed. |
| 316 | Much better corrosion resistance is needed, coupled with greatly improved ability to be welded and cold formed. |
All ferritic grades such as stainless steel grade 430, have excellent stress corrosion cracking resistance. Grade 430 has good corrosion resistance to numerous substances, such as certain organic acids and nitric acid. The corrosion resistance is maximized in well-polished or buffed condition. Its pitting and crevice corrosion resistance is quite similar to that of grade 304. 430 F is a high-sulfur free machining grade, and therefore the resistance to pitting and crevice corrosion is comparatively lesser than those grades that are non-free machining.
Stainless steel grade 430 is capable of resisting oxidation up to 870°C in intermittent usage, and up to 815°C in continuous usage. At room temperature, it has the tendency to become brittle, especially when it has been heated for a long time in the 400-600°C range.
Stainless Steel 316L 