AMS4008 is a special type of alloy steel used in applications requiring high strength and corrosion resistance. AMS 4008, or Type 4340, is designed to perform well under high-stress conditions in aerospace, military, and industrial applications. This blog post will discuss the composition, physical and mechanical properties, uses, hardness, and heat treatment of AMS4008.
What is AMS 4008?
At first, AMS4008 may seem complex, but it’s pretty simple. In short, AMS 4008 (also known as 3003 Aluminum Alloy) is a standard that specifies the requirements for a digital communication protocol used in various applications. This protocol is commonly used in aerospace, allowing communication between different systems and devices. By adhering to the AMS4008 standard, companies can ensure that their systems are compatible with others and can work together seamlessly. Whether you’re an engineer, a technician, or just someone interested in aerospace technology, understanding AMS4008 is crucial for success in the industry.
What Form Is AMS 4008 Available at Piping Mart?
- Pipes
- Tubing
AMS 4008 Composition
AMS4008 consists of carbon, chromium, molybdenum, nickel, and vanadium. It comprises 0.38-0.43% carbon, 0.60-0.80% manganese, 0.70-0.90% chromium, 0.20-0.30% molybdenum, 1.65-2.00% nickel, and 0.03% max phosphorus and sulfur.
| Element | Content (%) |
|---|---|
| Aluminum, Al | 98.6 |
| Manganese, Mn | 1.2 |
| Copper, Cu | 0.12 |
AMS 4008 Physical Properties
The physical properties of AMS 4008 include a density of 7.85 g/cm³, a specific heat of 0.46 J/g-K, and a coefficient of thermal expansion of 11.7 µm/m°C. The thermal conductivity of AMS 4008 is 43.8 W/m-K, its electrical conductivity is 3.5-5.5% IACS, and its magnetic permeability is 100-300.
| Properties | Metric | Imperial |
|---|---|---|
| Density | 2.73 g/cm3 | 0.0939 lb/in3 |
| Melting point | 644°C | 1190°F |
AMS 4008 Mechanical Properties
The mechanical properties of AMS 4008 include high strength, toughness, and flexibility. The tensile strength of AMS 4008 is 160 ksi, and its yield strength is 140 ksi. The elongation at break of AMS 4008 is 15%, and its area reduction is 40%. The fatigue strength of AMS 4008 is also impressive, with a fatigue endurance limit of 45 ksi.
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength | 130 MPa | 18855 psi |
| Yield strength | 125 MPa | 18130 psi |
| Shear strength | 83 MPa | 12039 psi |
| Fatigue strength | 55 MPa | 7977 psi |
| Elastic modulus | 70-80 GPa | 10153-11603 ksi |
| Poisson’s ratio | 0.33 | 0.33 |
| Elongation | 10% | 10% |
| Hardness | 35 | 35 |
AMS 4008 Equivalents
| ASME SFA5.3 (E3003) | ASTM B234 | ASTM B345 | AWS A5.3 (E3003) | QQ A-200/1 |
| ASTM B209 | ASTM B241 | ASTM B404 | MIL A-52174 | QQ A-225/2 |
| ASTM B210 | ASTM B247 | ASTM B483 | MIL E-15597 (MIL-3003) | QQ A-250/2 |
| ASTM B211 | ASTM B313 | ASTM B491 | MIL P-25995 | QQ A-430 |
| ASTM B221 | ASTM B316 | ASTM B547 | MIL S-12875 | QQ WW-T-700/2 |
| SAE J454 |
AMS 4008 Uses
AMS 4008 is used in various applications, including aircraft landing gear, power transmission gears, crankshafts, and connecting rods. It is also used in applications where high corrosion resistance is required, such as in marine environments.
AMS 4008 Hardness
The hardness of AMS 4008 may vary depending on its heat treatment. The typical hardness of AMS 4008 in the annealed condition is 217 HB, while it can reach a maximum hardness of 50 HRC when heat-treated.
AMS 4008 Heat Treatment
The heat treatment of AMS 4008 involves a process of hardening and tempering. Hardening is done by heating the steel to 815-845°C, then quenching it in oil or water. After hardening, the steel is tempered at a temperature of 540-660°C to relieve any internal stresses and to reduce the brittleness that can occur due to the hardening process.
Conclusion:
AMS 4008 material is a highly versatile alloy steel with a unique combination of mechanical and physical properties, making it an excellent choice for critical aerospace, military, and industrial applications. The composition of AMS 4008, along with its physical and mechanical properties, makes it an ideal choice for use in conditions where high strength, toughness, and corrosion resistance are required. With proper heat treatment, AMS 4008 can also exhibit impressive hardness, further expanding its range of potential uses. Overall, AMS 4008 is a crucial steel alloy that significantly impacts modern-day technological progress.
Meet Bhavesh, a seasoned blogger with a wealth of knowledge and experience. From metal products manufacturing to retail, Bhavesh has a diverse background in various industries and is dedicated to sharing his insights and expertise with readers.
