What is the difference between 416 and 420 stainless steel?
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There are significant differences in composition, properties and applications between 416 stainless steel and 420 stainless steel.
| Property | 416 Stainless Steel | 420 Stainless Steel |
|---|---|---|
| Chemical Composition | ||
| Carbon (C) | ≤0.15% | Higher carbon content |
| Chromium (Cr) | 12.00%-14.00% | Chromium present |
| Nickel (Ni) | ≤0.60% (allowed) | Usually none or trace |
| Molybdenum (Mo) | ≤0.60% (optional) | Usually none |
| Manganese (Mn) | ≤1.25% | - |
| Silicon (Si) | ≤1.00% | - |
| Phosphorus (P) | ≤0.06% | - |
| Sulfur (S) | ≤0.15% (some grades ≥0.15%) | - |
| Mechanical Properties | ||
| Tensile Strength | ≥540 MPa | Varies, often higher due to higher C content |
| Yield Strength | ≥275 MPa | - |
| Elongation | ≥20% | - |
| Hardness | Moderate, can be heat-treated for higher hardness | Generally higher hardness |
| Corrosion Resistance | Good | Good, with higher resistance to atmospheric conditions |
| Wear Resistance | Moderate | Higher due to higher carbon content |
Performance difference
416 stainless steel: It has good cutting performance and is suitable for the production of solenoid valves, micro motors and electrical components. Its corrosion resistance is not as good as 304 and 316 stainless steel, but it performs well in dry conditions and mildly corrosive environments. 416 stainless steel can be strengthened through heat treatment to achieve higher strength and hardness levels.
420 stainless steel: It is a high-carbon grade martensitic stainless steel with high hardness and good wear resistance and corrosion resistance. In hardened conditions, it has good resistance to the atmosphere.
Differences in application areas
416 stainless steel: Mainly used in the production of solenoid valves, micro motors and electrical components. Its good cutting performance and moderate strength are suitable for these application scenarios.
420 stainless steel: widely used in precision machinery, bearings, electrical, equipment, instruments, meters, transportation, household appliances and other fields, especially suitable for occasions requiring high hardness, wear resistance and certain corrosion resistance.
