ThePipingMart Blog Grades AMS 6350 Alloy Steel – Composition, Properties, and Uses

AMS 6350 Alloy Steel – Composition, Properties, and Uses

AMS 6350

The right material is essential in manufacturing and industrial settings to achieve high-quality and reliable products. One such material that has gained popularity in recent times is AMS6350. With its notable mechanical and physical properties, AMS 6350 has proven to be a dependable material for various applications. This blog will explore AMS 6350 material’s composition, properties, and uses in various industries.

What is AMS 6350?

SAE – AMS 6350 (also known as SAE – AISI 4130 Alloy Steel) is a type of alloy steel that is primarily used for aerospace applications. Its impressive combination of strength, toughness, and wear resistance make it an ideal material for critical components like gears, shafts, and landing gear. This metal is also known for its excellent machinability, making it easy to work despite its high strength. So next time you’re flying in a plane, you can have peace of mind knowing that AMS6350 is contributing to the safety and reliability of your flight.

What Form is AMS 6350 Available at Piping Mart?

  • Alloy Steel AISI 4130 Bars

AMS 6350 Composition

AMS 6350 sheet is an alloy steel known for its high hardness and strength, making it ideal for manufacturing aerospace components, machinery, and other industrial applications. AMS 6350 includes carbon, manganese, chromium, and molybdenum, among other elements, making it incredibly durable and resistant to wear and tear. Its high nickel content also gives it excellent corrosion resistance properties.

C Si Mn P S Cr Mo Fe
Min 0.28 0.15 0.40 0.80 0.15 0.00
Max 0.33 0.35 0.60 0.035 0.040 1.10 0.25 0.00

AMS 6350 Physical Properties

AMS 6350 plate boasts remarkable strength and toughness. It has a density of 7.85 g/cm3 and a melting point of 1420-1460°C. The alloy has a high tensile strength of 1331 MPa, a yield strength of 1148 MPa, and a moderate elongation of 11%. Its thermal conductivity is 52.6 W/m°C, and its coefficient of thermal expansion is 11.7 x 10-6/°C.

Properties Metric Imperial
Density 7.85 g/cm3 0.284 lb/in³
Melting point 1432°C 2610°F

AMS 6350 Mechanical Properties

AMS 6350 steel wire exhibits excellent resistance to fatigue and corrosion. Its hardness level can be increased up to 60 HRC through heat treatment processes such as quenching and tempering. With a machinability of 55% of that of the AISI 1212 steel, AMS 6350 is relatively easy to machine and form.

Properties Metric
Tensile strength, ultimate 560 MPa
Tensile strength, yield 460 MPa
Modulus of elasticity 190-210 GPa
Bulk modulus (Typical for steel) 140 GPa
Shear modulus (Typical for steel) 80 GPa
Poissons ratio 0.27-0.30
Elongation at break (in 50 mm) 21.50%
Reduction of area 59.6
Hardness, Brinell 217
Hardness, Knoop (Converted from Brinell hardness) 240
Hardness, Rockwell B (Converted from Brinell hardness) 95
Hardness, Rockwell C (Converted from Brinell hardness, value below normal HRC range, for comparison purposes only.) 17
Hardness, Vickers (Converted from Brinell hardness) 228
Machinability (Annealed and cold drawn. Based on 100% machinability for AISI 1212 steel.) 70

AMS 6350 Equivalents

AMS 6348 AMS 6371 ASTM A331 ASTM A829 DIN 1.7218
AMS 6350 AMS 6373 ASTM A506 MIL S-18729 UNI 25 CrMo 4
AMS 6351 AMS 6374 ASTM A507 MIL S-6758 JIS SCCrM 1
AMS 6360 AMS 6528 ASTM A513 SAE J1397 JIS SCM 2
AMS 6361 AMS 7496 ASTM A519 SAE J404 SS 2225
AMS 6362 ASTM A29 ASTM A646 SAE J412 B.S. CDS 110
AMS 6370 ASTM A322 ASTM A752 AFNOR 25 CD 4 (S) SAE J770

AMS 6350 Specifications

Country USA BS BS Japan
Standard ASTM A29 EN 10250/EN10083 BS 970 JIS G4105
Grades 4130 25CrMo4/1.7218 708A25/708M25 SCM430

AMS 6350 Uses

AMS 6350 plate is a widely used material in various applications. Its strength and toughness make it an ideal metal for aerospace applications, where it is used to manufacture components such as landing gear, engine parts, and structural components. It is used in the automotive and industrial sectors for machining and tooling applications, particularly for parts that require high wear and corrosion resistance. AMS 6350 is also commonly used in oil and gas drilling equipment, such as drill collars and drill pipes.

AMS 6350 Hardness

Regarding hardness, AMS 6350 is known as a wear-resistant steel. Its high hardness level is achieved through heat treatment processes involving quenching and tempering. This treatment results in steel with high toughness and strength.

AMS 6350 Heat treatment

Heat treatment is an essential aspect of AMS 6350material . The steel can be heat-treated to achieve various properties depending on the application. For instance, annealing can be done to soften the material, making it easier to machine and form. Quenching and tempering can be done to increase the hardness and strength of the steel.


AMS 6350 material is a popular steel alloy with outstanding mechanical and physical properties. Its composition makes it incredibly durable and resistant to wear, making it an excellent material for various industrial applications. Its remarkable strength and toughness make it perfect for aerospace applications. While its hardness level can be increased through heat treatment processes, its high machinability makes it ideal for machining and tooling. With this alloy’s numerous applications and properties, it remains a reliable and dependable material for different industries.

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