303 Stainless Steel Vs 416 – What’s The Difference
Leave a message
303 stainless steel and 416 stainless steel are similar, but have distinct differences that can have a significant impact on your project. This article explores the differences between 303 stainless steel and 416 stainless steel, their advantages and disadvantages, and which is better suited for specific applications.
303 vs 416 stainless steel microstructure:
The microstructure of 303 stainless steel is mainly austenite, which makes it have good toughness and plasticity, and is easy to process and form.
The microstructure of 416 stainless steel is mainly martensite, which makes it have high hardness and strength, but poor toughness and easy to crack during processing.
303 Stainless Steel vs 416 Chemical composition:
| Chemical Composition | 303 Stainless Steel | 416 Stainless Steel |
|---|---|---|
| Carbon (C) | ≤ 0.15% | ≤ 0.15% |
| Silicon (Si) | ≤ 1.00% | ≤ 1.00% |
| Manganese (Mn) | ≤ 2.00% | ≤ 1.25% |
| Phosphorus (P) | ≤ 0.020% | ≤ 0.060% |
| Sulfur (S) | ≥ 0.15% | ≥ 0.15% |
| Chromium (Cr) | 17-19% | 12.0-14.0% |
| Nickel (Ni) | 8-10% | ≤ 0.60% |
| Molybdenum (Mo) | ≤ 0.06% | ≤ 0.60% |
303 Stainless Steel vs 416 Machining Properties
| Mechanical Properties | 303 Stainless Steel | 416 Stainless Steel |
|---|---|---|
| Tensile Strength (Ultimate) | 690 MPa | - |
| Yield Strength (0.2% Offset) | 415 MPa | - |
| Elongation at Break | 40% | - |
| Hardness (Brinell) | 228 | - |
| Hardness (Rockwell B) | 96 | - |
| Hardness (Rockwell C) | 19 | - |
| Hardness (Vickers) | 240 | - |
| Hardness (HRC) after Heat Treatment | - | 30-45 HRC |
| Magnetic Properties | Non-magnetic | Magnetic |
Application:
303 stainless steel is often used in places that require good corrosion resistance and certain strength, such as food processing equipment, chemical containers, etc., due to its good corrosion resistance and processing performance.
416 stainless steel is often used in places that need to withstand high stress and wear, such as knives, bearings, valves, etc., due to its high hardness and strength, as well as good wear resistance.
