If you are looking for a strong and reliable metal alloy, AMS 7728 is an excellent choice. It is a specific alloy known for its durability and resistance to wear. AMS 7728 has been widely used in various industries, including aerospace, defence, and oil and gas. This blog post will dive deep into understanding AMS 7728, its composition, physical and mechanical properties, uses, hardness, and heat treatment.
What is AMS 7728?
AMS 7728 (also known as Nilo K Alloy) is a highly technical specification that outlines the requirements for a specific type of titanium alloy. This alloy is commonly used in various industries, including aerospace and defence, because of its exceptional strength and resistance to corrosion. Designed to withstand extreme temperatures and harsh environments, AMS 7728 is a vital component in many critical applications. Understanding the intricacies of this specification requires a level of expertise that is essential for anyone involved in producing or using this material.
AMS 7728 Composition
AMS 7728 is a nickel-chromium-molybdenum-tungsten alloy that contains high-strength properties. The alloy is made using a combination of nickel, chromium, molybdenum, and tungsten. These elements help enhance the resistance to wear and provide high strength to the metal. It also contains carbon, silicon, phosphorus, sulfur, and iron. The percentage of these elements varies depending on the specific AMS 7728 grade.
| Element | Content (%) |
|---|---|
| Iron, Fe | 53 |
| Nickel, Ni | 29 |
| Cobalt, Co | 17 |
| Others | Remainder |
AMS 7728 Physical Properties
AMS 7728 has excellent physical properties. It is a high-strength, heat-resistant alloy that can withstand high temperatures. The alloy has a density of 8.23 g/cm³, which is relatively high compared to other metal alloys. It has a specific heat capacity of 0.46 J/g K, thermal conductivity of 12.1 W/m K, and a melting point of 1391° C.
| Properties | Metric | Imperial |
|---|---|---|
| Density | 8.16 gm/cm3 | 0.295 lb/in3 |
AMS 7728 Mechanical Properties
AMS 7728’s mechanical properties make it a desirable alloy for industrial purposes. It is a high-strength, wear-resistant alloy that withstands extreme pressure and temperature. The alloy has a tensile strength of 170-205 ksi, yield strength of 105-145 ksi, and elongation of 10%. Additionally, it also has excellent fatigue strength and creep resistance.
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength | 520MPa | 75.4 ksi |
| Yield strength | 340 MPa | 49.3 ksi |
| Modulus of elasticity | 130 GPa | 18900 ksi |
AMS 7728 Equivalents
- UNS K94610
- ASTM F15
- DIN 17745
- AFNOR NF A54-301.
AMS 7728 Uses
The high strength and wear resistance of AMS 7728 makes it an ideal alloy for various industrial uses. The alloy is widely used in aerospace manufacturing aircraft parts, engine components, and rocket motor cases. It also finds extensive applications in the defence sector, such as tank tracks, gun barrels, and missile casings. The oil and gas industry uses AMS 7728 for manufacturing drill bits, downhole tools, and hangers.
AMS 7728 Hardness
AMS 7728’s hardness varies depending on the specific grade and heat treatment. The alloy’s hardness ranges from 28 to 44 HRC. It is a rigid material that can withstand extreme temperatures and pressure conditions.
AMS 7728 Heat treatment
AMS 7728’s heat treatment is crucial to enhance its mechanical properties. The alloy can be heat-treated to improve its strength, hardness, and toughness. The heat treatment process involves annealing, quenching, and tempering. The specific heat treatment process depends on the particular grade and intended use.
Conclusion:
AMS 7728 is a high-strength, wear-resistant alloy with excellent physical and mechanical properties. Its strength, toughness, and ability to withstand extreme temperatures and pressure make it an ideal material for various industrial applications. The alloy’s composition, physical and mechanical properties, uses, hardness and heat treatment are crucial for its practical use. If you are looking for a reliable and durable alloy, AMS 7728 is an excellent choice.
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