AMS 6419 is a high-quality engineering steel used in various industries to manufacture critical components that require strength, durability, and excellent machinability. It is low-alloy steel typically supplied as hot-rolled bars, which are later machined to form parts with precise tolerances. This article will provide an overview of the composition, properties, and uses of AMS 6419 steel, along with information on its hardness and heat treatment options.
What is AMS 6419?
AMS 6419 (also known as Alloy Steel 4340) metal is a specialized alloy that has become highly demanded in various industries. This unique material is known for its high strength and toughness properties, making it an excellent choice for applications that require extreme durability. Additionally, AMS 6419 metal exhibits excellent wear resistance, which makes it ideal for high-stress environments. Its unique composition, featuring elements like chromium and molybdenum, also gives it resistance to corrosion and oxidation. This makes it a popular material for parts and components that need to withstand harsh environments, such as engine components in aircraft and other high-performance machinery. Overall, AMS 6419 metal is a highly versatile and sought-after material that has transformed how we approach engineering and manufacturing in today’s industries.
What Form is AMS 6419 Available at Piping Mart?
- Bars
AMS 6419 Composition
AMS 6419 is a low-alloy, vacuum-melted steel that combines iron, chromium, molybdenum, nickel, and other elements. The composition of AMS 6419 steel is carefully controlled to ensure high toughness, wear resistance, and corrosion resistance, making it suitable for use in demanding environments. The typical chemical composition of AMS 6419 includes 0.20% carbon, 0.30% silicon, 0.90% manganese, 0.80% chromium, 0.25% molybdenum, and 0.40% nickel.
| Element | Content (%) |
|---|---|
| Iron, Fe | 93.4 – 94.8 |
| Nickel, Ni | 1.65 – 2.0 |
| Silicon, Si | 1.45 – 1.80 |
| Chromium, Cr | 0.70 – 0.95 |
| Manganese, Mn | 0.65 – 0.90 |
| Carbon, C | 0.40 – 0.460 |
| Phosphorous, P | 0.035 |
| Molybdenum, Mo | 0.30 – 0.45 |
| Vanadium, V | 0.050 |
| Sulfur, S | 0.040 |
AMS 6419 Physical Properties
AMS 6419 has excellent physical properties, making it an ideal choice for manufacturing various components. It has a density of 7.85 g/cm³ and a melting point of 1425°C. The steel also exhibits good weldability, making it suitable for joining other materials. Another important property of AMS 6419 is its machinability, which is excellent due to its low carbon content.
| Properties | Metric | Imperial |
|---|---|---|
| Density | 7.87 g/cm3 | 0.284 lb/in³ |
| Melting point | 1422°C | 2590°F |
AMS 6419 Mechanical Properties
The mechanical properties of AMS 6419 steel depend on the heat treatment process used during manufacturing. Generally, the steel is supplied in the normalized and tempered condition, which balances strength and toughness. The typical tensile strength of AMS 6419 is around 1000 MPa, while its yield strength is approximately 800 MPa. The steel also exhibits good fatigue strength and impact toughness, which makes it suitable for high-stress applications.
| Properties | Metric | Imperial |
|---|---|---|
| Shear modulus (typical for steel) | 80 GPa | 11600 ksi |
| Elastic modulus | 205 GPa | 29700 ksi |
| Poisson’s ratio | 0.28 | 0.28 |
AMS 6419 Equivalent
- AMS 6417
- AMS 6419
- ASTM A579 (32)
- ASTM A646 (300M-8)
- MIL S-8844 (3)
- MIL S-8844 Class 2
AMS 6419 Uses
AMS 6419 steel is widely used in the aerospace, defence, and automotive industries to manufacture critical components such as landing gear, transmission parts, and drive shafts. Its excellent strength, toughness, and wear resistance make it a preferred choice in these applications. Steel is also used to manufacture gear components, piston pins, connecting rods, and turbine blades.
AMS 6419 Hardness
The hardness of AMS 6419 steel depends on the heat treatment process used during manufacturing. Generally, the steel is supplied in the range of 269-321 HB in the normalized and tempered condition. However, the hardness can be increased by applying different heat treatment processes, such as quenching and tempering, resulting in a hardness range of 321-388 HB.
AMS 6419 Heat Treatment
AMS 6419 steel is typically supplied in the normalized and tempered condition, which balances strength and toughness. However, the steel can be further heat-treated to enhance its mechanical properties. Quenching and tempering can increase the hardness and tensile strength of the steel, while annealing can improve its machinability. The selection of the heat treatment process depends on the desired mechanical properties and the intended application of the steel.
Conclusion:
AMS 6419 material is a high-quality engineering steel with excellent strength, toughness, and machinability. Its low-alloy composition, carefully controlled during manufacturing, makes it suitable for use in various industries for manufacturing critical components. The steel’s excellent physical and mechanical properties and its different heat treatment options make it a versatile material that can meet the requirements of different applications.
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