Hy-Tuf VAR AMS 6425; AMS 6418
Hy-Tuf is a high strength low alloy steel. It exhibits good strength, ductility and fracture toughness.
Stock sizes: 1.500”dia to 3.500” diameter
Common Specifications:
- AMS 6425
- AMS 6418
- Boeing DMS-1841
Industry Trade Names:
UNS K32550
Common Applications:
- Landing gear
- Flap tracks
Macrostructure Limits:
| Class | Condition | Severity |
|---|---|---|
| 1 | Freckles | A |
| 2 | White Spots | A |
| 3 | Radial Segregation | B |
| 4 | Ring Pattern | B |
Composition
| Element | Min. | Max. |
|---|---|---|
| Carbon | 0.23 | 0.28 |
| Manganese | 1.20 | 1.50 |
| Silicon | 1.30 | 1.70 |
| Phosphorus | — | 0.010 |
| Sulfur | — | 0.010 |
| Chromium | 0.20 | 0.40 |
| Nickel | 1.65 | 2.00 |
| Molybdenum | 0.35 | 0.45 |
| Copper | — | 0.35 |
Minimum Longitudinal Tensile Properties:
| Property | Value |
|---|---|
| Tensile Strength | 220 ksi (1517 MPa) |
| Yield Strength at 0.2% Offset | 185 ksi (1276 MPa) |
| Elongation in 4D | 10% |
| Reduction of Area | 30% |
Average grain size requirement of ASTM No. 5 or finer in accordance with ASTM E112.
