ThePipingMart Blog Grades AMS 6514 Maraging Alloy – Composition, Properties, and Uses

AMS 6514 Maraging Alloy – Composition, Properties, and Uses

AMS 6514

AMS 6514 is a unique type of steel that has become increasingly popular in various industries. It is an alloy of chromium molybdenum, also known as a low-alloy steel with excellent strength and hardness. The material is often used in high-stress and high-temperature applications such as aircraft engines and power-generation equipment. This blog post will deeply investigate AMS 6514 and explore its composition, properties, uses, and more.

What is AMS 6514?

AMS 6514 (also known as Maraging 300 Alloy)metal is a high-strength alloy steel type often used in industries such as aerospace and defence. It is known for its resistance to wear and tear and its ability to withstand extreme temperatures and pressures. The metal is often used in critical applications where reliability and durability are paramount. Its unique properties make it ideal for components such as gears, shafts, and other structural parts requiring exceptional strength and toughness. Whether you’re building a jet engine, a military vehicle, or any other complex machinery, AMS 6514 metal is an excellent choice for your next project.

AMS 6514 Composition

AMS 6514 is a low-alloy steel that consists of chromium (0.50-0.80%), molybdenum (0.25-0.35%), nickel (1.45-2.00%), and manganese (<0.35%). In addition to these components, it also has low carbon levels, which helps avoid the risk of brittle fracture during the welding process. The alloy is made through a vacuum-melted process, which enhances its purity and consistency.

Element Content (%)
Iron, Fe 67
Nickel, Ni 18.5
Cobalt, Co 9
Molybdenum, Mo 4.8
Titanium, Ti 0.6
Aluminum, Al 0.1
Silicon, Si 0.10
Manganese, Mn 0.10
Carbon, C 0.030
Zirconium, Zr 0.01
Phosphorous, P 0.010
Sulfur, S 0.010
Boron, B 0.0030

AMS 6514 Physical Properties

AMS 6514 has excellent high-temperature stability, making it ideal for high-temperature industrial environments. The alloy’s density is 7.85 g/cm³, and its thermal conductivity is 44.5 W/mK, lower than regular steel. Still, its strength at high temperatures makes it a more attractive option in most applications. The alloy also has good corrosion resistance, making it suitable for applications exposed to harsh chemical environments.

Properties Metric Imperial
Density 8.00 g/cm3 0.289 lb/in³
Melting point 1412.8 °C 2575°F

AMS 6514 Mechanical Properties

AMS 6514 has a minimum tensile strength of 180 ksi, which means the alloy is incredibly strong and can withstand high stresses. The yield strength is 155 ksi, and the elongation at break is 12%. The tough and flexible material makes it an ideal option for high-stress applications, such as aerospace and defence components.

Properties Metric Imperial
Tensile strength (@538°C/1000°F) 1158 MPa 168000 psi
Yield strength (@strain 0.200 %, temperature 538°C/@strain 0.200 %, temperature 1000°F) 1056 MPa 153200 psi
Bulk modulus (typical for steel) 140 GPa 20300 ksi
Shear modulus (estimated from elastic modulus) 73.0 GPa 10600 ksi
Elastic modulus 190 GPa 27600 ksi
Poisson’s ratio 0.3 0.3
Elongation at break (in gage length of 4.5 times the square root of the area, @ 316°C/600 °F) 12.00% 12.00%
Reduction of area (@427°C/800°F) 61.30% 61.30%

AMS 6514 Equivalent

  • Equivalent material to AMS 6514 Stainless steel includes DIN 1.6354.

AMS 6514 Thermal Properties

Properties Metric Imperial
Thermal expansion co-efficient (@21-480°C/69.8-896°F) 10.1 µm/m°C 5.61 µin/in.°F
Thermal conductivity (20°C) 25.3 W/mK 176 BTU in/hr.ft².°F

AMS 6514 Uses

Due to its unique composition, AMS 6514 is often used in high-temperature and high-stress applications. Some of the most common uses for this metal include gas turbines, aircraft engines, power generation components, rocket motor components, and hydraulic systems. The alloy is also suitable for applications that require excellent corrosion resistance.

AMS 6514 Hardness

AMS 6514 is a high-strength steel with a Rockwell hardness of C 36. This measures the material’s resistance to penetration, indicating that AMS 6514 is a hard material that can withstand high loads and stress.

AMS 6514 Heat Treatment

AMS 6514 can undergo several heat treatment processes to improve its strength and hardness. This alloy’s most common heat treatment methods are austenitizing, quenching, and tempering. This process enhances the material’s strength and ductility, making it an ideal candidate for high-stress applications.


AMS 6514 material is an alloy with unique properties that set it apart from regular steel. Its excellent high-temperature properties, strength, and hardness make it an ideal choice in various industries, including aerospace and defence, power generation, and hydraulic systems. Understanding the composition and properties of AMS 6514 allows industry professionals to decide which material would best suit their application’s specific requirements.

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