Industry Specifications: USA Aerospace: AMS 4974.
Features: TIMETAL 679 has excellent tensile strength and is creep resistant up to 450°C. It is a three-phase alloy at room temperature, having an alpha + beta + compound field and a maximum temperature of 925°C is recommended. It is nonmagnetic.
Typical heat treatment for this alloy: Solution heat treatment: 900°C for 30 min, air cool. Aging heat treatment: 500°C for 24 hrs, air cool.
Data provided by TIMET.
| 物理性能 | 额定值 (公制) | 额定值 (英制) | 测试方法 |
|---|---|---|---|
| 密度 | g/cc | lb/in³ | Typical |
| 机械性能 | 额定值 (公制) | 额定值 (英制) | 测试方法 |
|---|---|---|---|
| 极限抗拉强度 | >= MPa | >= psi | |
| 抗张强度(屈服) | >= MPa @Strain 0.200 % | >= psi @Strain 0.200 % | |
| 伸长率 (断裂) | |||
| 面积减少 | |||
| 弹性模量 | GPa | ksi | Typical |
| Fatigue Strength | MPa | psi | Limit; test specifics not reported |
| 剪切模量 | GPa | ksi |
| 电气性能 | 额定值 (公制) | 额定值 (英制) | 测试方法 |
|---|---|---|---|
| 电阻率 | ohm-cm | ohm-cm |
| 热性能 | 额定值 (公制) | 额定值 (英制) | 测试方法 |
|---|---|---|---|
| 线性热膨胀系数 | µm/m-°C @Temperature 20.0 °C | µin/in-°F @Temperature 68.0 °F | |
| 导热系数 | W/m-K | BTU-in/hr-ft²-°F | |
| Beta Transus | °C | °F |
| 构成要素属性 | 额定值 (公制) | 额定值 (英制) | 测试方法 |
|---|---|---|---|
| 铝 | |||
| Hydrogen, H | |||
| 铁 | |||
| 钼 | |||
| Oxygen, O | |||
| 硅酮 | |||
| 锡 | |||
| 钛 | Calculated as remainder | ||
| Zirconium, Zr |