AMS4928 is a high-performance titanium alloy widely used in aerospace, medical and military engineering applications. This titanium alloy’s strength and excellent corrosion resistance make it one of the most widely used metals in the industry. In this blog post, we’ll discuss AMS4928 in great detail, including its composition, physical and mechanical properties, uses, hardness, and heat treatment.
What is AMS 4928?
AMS 4928 (also known as Titanium Grade -5 Alloy) is a titanium alloy specification commonly used in aerospace applications. The aerospace industry requires materials that can withstand extreme temperatures, pressure, and loads, and titanium alloys fit the bill. AMS 4928 is a particular kind of titanium alloy specifically formulated to meet the industry’s high standards. This alloy has excellent strength-to-weight ratio, corrosion resistance, and fatigue strength, making it ideal for aircraft structures, engines, and other critical components. It’s no wonder that AMS 4928 is one of the most widely used titanium alloys in the aerospace industry today.
What Form is AMS 4928 Available at Piping Mart?
- Bolts
- Pipes
- Tubing
- Valves
AMS 4928 Composition
AMS 4928 is a grade 5 titanium alloy with a chemical composition containing 6% aluminium, 4% vanadium, and 90% pure titanium. It is important to note that small variations in the composition can alter the material’s properties, such as corrosion resistance, strength, and flexibility.
|
|
Content |
|
C |
<0.08% |
|
Fe |
<0.25% |
|
N2 |
<0.05% |
|
O2 |
<0.2% |
|
Al |
5.5-6.76% |
|
V |
3.5-4.5% |
|
H2(sheet) |
<0.015% |
|
H2(bar) |
<0.0125% |
|
H2(billet) |
<0.01% |
|
Ti |
Balance |
AMS 4928 Physical Properties
AMS 4928 is known for its excellent physical properties, such as low density and high strength. Its density is around 60% of that of steel, making it a light material with excellent strength. The melting point of AMS 4928 is around 3000°F, which makes it suitable for high-temperature applications. Additionally, it has excellent flexibility, allowing it to be easily formed or machined into various shapes.
|
Property |
Typical Value |
|
Density g/cm3 (lb/ cu in) |
4.42 (0.159) |
|
Melting Range °C±15°C (°F) |
1649 (3000) |
|
Specific Heat J/kg.°C (BTU/lb/°F) |
560 (0.134) |
|
Volume Electrical Resistivity ohm.cm (ohm.in) |
170 (67) |
|
Thermal Conductivity W/m.K (BTU/ft.h.°F) |
7.2 (67) |
|
Mean Co-Efficient of Thermal Expansion 0-100°C /°C (0-212°F /°F) |
8.6×10-6 (4.8) |
|
Mean Co-Efficient of Thermal Expansion 0-300°C /°C (0-572°F /°F) |
9.2×10-6 (5.1) |
|
Beta Transus °C±15°C (°F) |
999 (1830) |
AMS 4928 Mechanical Properties
One of the most significant advantages of AMS 4928 is its mechanical properties, such as high fatigue strength and excellent fracture toughness. It has a tensile strength of 1250 Mpa, much higher than other titanium alloys. AMS 4928’s high strength-to-weight ratio makes it an ideal material for high-stress applications, such as aircraft parts or medical implant devices.
|
Property |
Minimum |
Typical Value |
|
Tensile Strength MPa (ksi) |
897 (130) |
1000 (145) |
|
0.2% Proof Stress MPa (ksi) |
828 (120) |
910 (132) |
|
Elongation Over 2 Inches % |
10 |
18 |
|
Reduction in Area % |
20 |
|
|
Elastic Modulus GPa (Msi) |
|
114 (17) |
|
Hardness Rockwell C |
|
36 |
|
Specified Bend Radius <0.070 in x Thickness |
|
4.5 |
|
Specified Bend Radius >0.070 in x Thickness |
|
5.0 |
|
Welded Bend Radius x Thickness |
6 |
|
|
Charpy, V-Notch Impact J (ft.lbf) |
|
24 (18) |
AMS 4928 Uses
AMS 4928 is widely used in aerospace, medical, and military equipment. Aircraft manufacturing companies use AMS 4928 for making turbine parts, engine casings, and landing gears. Medical equipment manufacturers use this titanium alloy for making implants due to its biocompatibility properties. Military equipment manufacturers use it for making various equipment, including missiles, rocket motors, and armour plating.
AMS 4928 Hardness
AMS 4928 is known for its high hardness, making it a durable and wear-resistant material. Moreover, hardness can be increased via heat treatment methods, making it stronger and more resistant to abrasion. The hardness of AMS 4928 can be controlled by adjusting the alloy’s heat treatment process and cooling rate.
AMS 4928 Heat Treatment
Heat treatment can alter the properties of the AMS 4928 titanium alloy significantly. Heat treatment can increase strength, flexibility, and hardness, making it more appropriate for various applications. Heat treatment involves heating the material above its critical temperature and cooling it rapidly or gradually to achieve the desired properties.
Conclusion:
AMS 4928 material is a high-performance titanium alloy with excellent mechanical and physical properties. Its high strength, corrosion resistance, and biocompatibility properties make it an ideal choice for various aerospace, medical and military applications. Heat treatment can alter its properties, making it more appropriate for specific applications. The benefits of AMS 4928 make it a sought-after alloy in the industry, and it’s expected to remain popular for years.
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