SS 201 and 202 are both of high manganese (Mn) stainless steel, in which much manganese come into use instead of nickel (Ni) and get the nearly same effect as 304 in some weakly anticorrosion environment. Additionally, due to the cheaper cost, SS 200 series still remain the competitive advantage to satisfy those certain needs in market.
SS 301,304 and 316 are all of classic stainless steel, who have been enjoyed most popularity and widely used in world.
SS 200 Series and SS 300 series are belonged to Austenite structure with nonmagnetic or weakly magnetic property, which is distinguished from SS 400 series who are of Martensitic structure with strong magnetism.
| SS wire grade | Chemical components(%) | |||||||
|---|---|---|---|---|---|---|---|---|
| C (Max) | Ni | Cr | Mn | Si (Max) | S (Max) | P (Max) | Mo | |
| 201 | 0.15 | 3.5-4.5 | 16-18 | 5.5-7.5 | 1 | 0.03 | 0.06 | — |
| 202 | 0.15 | 4.0-6.0 | 17-19 | 7.5-10.0 | 1 | 0.03 | 0.06 | — |
| 301 | 0.15 | 6.0-8.0 | 16-18 | 2.0(Max) | 1 | 0.03 | 0.035 | — |
| 304 | 0.08 | 8.0-10.0 | 18-20 | 2.0(Max) | 1 | 0.03 | 0.035 | — |
| 316 | 0.08 | 10.0-14.0 | 16-18 | 2.0(Max) | 1 | 0.03 | 0.035 | 2.0-3.0 |
| 410 | 0.15 | 0.60(Max) | 11.5-13.5 | 1.0(Max) | 1 | 0.03 | 0.035 | — |
| 420 | 0.16-0.25 | 0.75(Max) | 12.0-14.0 | 1.0(Max) | 1 | 0.03 | 0.04 | — |
| 430 | 0.12 | 0.60(Max) | 16-18 | 1.0(Max) | 0.75 | 0.03 | 0.04 | — |