Stainless Steel 416
Stainless Steel 416 – Highest Machinability Free-Machining Martensitic Stainless Steel
Stainless Steel 416 achieves the highest machinability rating of any stainless steel grade through its sulfur addition. Unlike austenitic 303, it can be heat-treated for increased hardness and strength, making it suitable for pump shafts, gears, and valve bodies where both free-machining performance and moderate strength are required.
Key Properties
- Tensile Strength: 517 MPa
- Yield Strength: 276 MPa
- Hardness: 262 HB
- Machinability: Highest in the stainless family
- Heat-Treatable: Yes
- Standard: ASTM A582
Common Applications
Pump shafts, valve stems, gears, studs, motor shafts, solenoid components, and high-volume precision machined parts requiring moderate corrosion resistance and optional heat treatment capability.
Material properties
| Material name | Stainless Steel 416 |
|---|---|
| Type | Stainless Steel |
| Standard code | ASTM A582 |
| Tensile strength (MPa) | 517 |
| Yield strength (MPa) | 276 |
| Fatigue strength (MPa) | 241 |
| Elongation (%) | 25 |
| Hardness (Brinell) | 262 |
| Density (g/cm³) | 7.74 |
| Electrical resistivity (µΩ·in) | 57 |
| Thermal conductivity (W/m·K) | 24.9 |
| Melting range (°C) | 1480–1530 |
| Weldability | Poor |
| Formability | Fair |
| Shear modulus | 74 |
| Industry code | ss_416 |