ThePipingMart Blog Grades AMS 4318 Aluminum Alloy – Composition, Properties and Uses

AMS 4318 Aluminum Alloy – Composition, Properties and Uses

AMS 4318

If you work in metallurgy or a related industry, you may have come across AMS4318. This specification defines the requirements for a particular type of steel alloy. Understanding the properties and uses of AMS 4318 can help you make informed decisions when selecting materials for your projects. In this blog post, we’ll explore the composition, physical and mechanical properties, uses, hardness, and heat treatment of AMS4318.

What is AMS 4318?

AMS 4318 (also known as 4032 Aluminum Alloy)  is a highly specialized type of steel used to manufacture aircraft components and other high-performance applications. This type of steel has unique properties that make it ideal for use in extreme environments and under extreme conditions. It is high strength and excellent corrosion resistance makes it a popular choice for critical aircraft components, such as landing gear and structural components. The steel’s ability to withstand high temperatures and stress make it an excellent material for other demanding applications, such as rocket engines and nuclear reactors. With its impressive range of properties, it’s clear that AMS 4318 is an important material in engineering and manufacturing.

AMS 4318 Composition

AMS 4318 is a low-alloy steel that contains chromium, molybdenum, nickel, and vanadium as alloying elements. These alloying elements give AMS 4318 its strength and corrosion resistance. Carbon and manganese are also present but in lower amounts. The composition of AMS 4318 makes it ideal for use in applications where high tensile strength and toughness are required.

Element Content (%)
Aluminum, Al 85
Silicon, Si 12.20
Magnesium, Mg 1.0
Copper , Cu 0.90
Nickel, Ni 0.9

AMS 4318 Physical Properties

AMS 4318 has a density of 7.85 g/cm3. Its melting point is around 1450°C. The steel has a high strength-to-weight ratio, making it a popular choice in the aerospace industry. Its high melting point also makes it suitable for use in high-temperature applications.

AMS 4318 Mechanical Properties

AMS 4318 has excellent mechanical properties, including high tensile strength, yield strength, and elongation. The tensile strength of this steel ranges between 1350 and 1500 MPa. Its yield strength is around 1150 MPa. The elongation of AMS 4318 is typically between 10% and 15%, depending on the heat treatment.

Properties Metric Imperial
Elastic modulus 70-80 Gpa 10152-11603 ksi
Poisson’s ratio 0.33 0.33

AMS 4318 Equivalents

  • ASTM B247
  • QQ A-367
  • SAE J454

AMS 4318 Uses

AMS 4318 is used in various applications that require high strength, toughness, and corrosion resistance. Some common applications for AMS 4318 include aircraft landing gear, missile components, and high-stress machine parts. The steel is also used to manufacture springs, shafts, and gears.

AMS 4318 Hardness

AMS 4318 has a hardness of around 300-350 HB. The hardness of this steel can be adjusted by altering the heat treatment process. A higher heat treatment will increase the hardness of the steel, while a lower heat treatment will result in softer steel with better toughness.

AMS 4318 Heat treatment

AMS 4318 can be heat treated to achieve different mechanical properties and hardness levels. The steel is typically quenched and tempered to increase its hardness and strength. The exact heat treatment process will depend on the steel’s intended use.

Conclusion:

AMS 4318 material is a low-alloy steel that contains chromium, molybdenum, nickel, and vanadium as alloying elements. Its composition gives it excellent mechanical properties, high strength, and good corrosion resistance. The steel is used in various applications, including aircraft landing gear, missile components, and high-stress machine parts. Its hardness can be adjusted through heat treatment, making it a versatile material. Understanding the properties and uses of AMS 4318 can help you choose the right material for your project.

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