Alloy 250 is an age-hardenable (maraging) iron-nickel steel, combining ultra-high strength, toughness and resistance to crack propagation.
播播合金250行业标准
S162 British Standard and is also known as UNS K44220.
Applications of Maraging Alloy 250
The maraging alloy 250 has a wide range of application including:
- 火箭电机壳
- Light aircraft landing gear
- 电源轴
- Low temperature tooling
Heat Treatment of Maraging Alloy 250
Hardening is accomplished by a simple aging cycle of 3 to 6 hours at 485°C (900°F), followed by air cooling. Alloy 250 provides through hardening without quenching, freedom from decarburization, minimal distortion during aging, good formability, machinability, and weldability and a low coefficient of thermal expansion.
Chemical Composition of Maraging Alloy 250
The Super Alloys ultra-high strength maraging alloy 250 has the following chemical composition that gives it its unique properties.
表格1。Chemical composition of maraging alloy 250
Chemical Elements |
Min |
Max |
Nickel |
17.0 |
19.0 |
钼 |
4.6 |
5.1 |
Cobalt |
7.0 |
8.5 |
Carbon |
- |
0.03 |
铝 |
0.05 |
0.15 |
磷 |
- |
0.01 |
Sulfur |
- |
0.01 |
硅 |
- |
0.10 |
钛 |
0.3 |
0.5 |
Manganese |
- |
0.01 |
Iron |
68.0 |
- |
Mechanical Properties of Maraging Alloy 250
在下列表中概述了在不同热处理后的游播合金250的机械性能。
表2。溶液的机械性能退火播播合金250
816°C (1500°F), 1hr, AC |
Metric |
英语 |
Tensile Strength, Ultimate |
1000 MPa |
145 ksi |
拉伸强度，产量 |
793 MPA. |
115 ksi. |
Percent Elongation |
20％ |
|
Table 3.Mechanical properties for solution annealed and aged maraging alloy 250
485°C (900°F), 3-6hrs, Ac |
Metric |
英语 |
Tensile Strength, Ultimate |
1800 MPa |
260 ksi. |
拉伸强度，产量 |
1700 MPa |
246 ksi |
Percent Elongation |
8% |
|
Mastraging合金250的物理性质
下表中概述了游花合金250的物理性质。
Table 4.Mastraging合金250的物理性质
|
Metric |
Imperial |
Thermal Expansion 21°C (70°F) |
9.72 µm/m-°C |
5.4μIN/ IN-°F |
Specific Heat Capacity |
293 j / kg-°k |
0.07 BTU / LB-°F |
Thermal Conductivity |
19.6 W/m-°C |
136 BTU-IN / HR-FT2-°F |
可用产品形式的合金250
Maraging alloy 250 is available in the forms of plate, bar, sheet, tube, billet, and forging
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This information has been sourced, reviewed and adapted from materials provided byNeonickel.。
For more information on this source, please visitNeonickel.。