ThePipingMart Blog Grades AMS 6454 Alloy Steel – Composition, Properties, and Uses

AMS 6454 Alloy Steel – Composition, Properties, and Uses

AMS 6454

High-strength alloys are becoming increasingly popular due to their strength and durability in various industrial applications. One such alloy that has gained attention is AMS6454. Due to its high-quality physical and mechanical properties, this composition has become a preferred choice for critical aerospace, defense, and automotive components. This blog post will explore AMS 6454’s composition, physical and mechanical properties, and uses.

What is AMS 6454?

AMS 6454 (also known as AISI 4340 Alloy Steel) is a specific type of alloy steel that meets stringent aerospace material specifications. It is commonly used to manufacture high-performance parts, such as gears and shafts, requiring exceptional strength and durability. AMS6454 steel is known for its excellent fatigue resistance and toughness, making it a top choice for critical applications. If you’re in the aerospace engineering field or simply interested in high-tech materials, now you know what AMS6454 is all about!

What Form is AMS 6454 Available at Piping Mart?

  • Alloy Steel AISI 4340 Bars

AMS 6454 Composition

AMS6454 is a low-alloy steel composed of nickel, chromium, molybdenum, and other elements. The exact composition of the alloy may vary depending on the manufacturer’s specifications. Typically, AMS 6454 contains nickel and chromium in its composition. This gives the alloy a high corrosion resistance, oxidation resistance, and excellent mechanical properties.

Element Content (%)
Iron, Fe 95.195 – 96.33
Nickel, Ni 1.65 – 2.00
Chromium, Cr 0.700 – 0.900
Manganese, Mn 0.600 – 0.800
Carbon, C 0.370 – 0.430
Molybdenum, Mo 0.200 – 0.300
Silicon, Si 0.150 – 0.300
Sulfur, S  0.0400
Phosphorous, P  0.0350

AMS 6454 Physical Properties

AMS 6454 is known for its physical properties. It is a heat-treated alloy with excellent strength, durability, and corrosion resistance. Its density is around 7.85 g/cm3, with a specific gravity of 7.85. Its melting point is approximately 1475-1530℃, and its thermal conductivity capacity is around 24 W/(m. K).

Properties Metric Imperial
Density 7.85 g/cm3 0.284 lb/in³
Melting point 1427°C 2600°F

AMS 6454 Mechanical Properties

AMS 6454’s mechanical properties are exceptional, making it one of the preferred alloys for critical components in several industries. Its ultimate tensile strength ranges between 1900 and 2200 MPa, and its yield strength is between 1650 and 1900 MPa. The elongation capacity of the alloy ranges between 13-18%, and its hardness varies between 45-52 HRC.

Properties Metric Imperial
Tensile strength 745 MPa 108000 psi
Yield strength 470 MPa 68200 psi
Bulk modulus (typical for steel) 140 GPa 20300 ksi
Shear modulus (typical for steel) 80 GPa 11600 ksi
Elastic modulus 190-210 GPa 27557-30458 ksi
Poisson’s ratio 0.27-0.30 0.27-0.30
Elongation at break 22% 22%
Reduction of area 50% 50%
Hardness, Brinell 217 217
Hardness, Knoop (converted from Brinell hardness) 240 240
Hardness, Rockwell B (converted from Brinell hardness) 95 95
Hardness, Rockwell C (converted from Brinell hardness. Value below normal HRC range, for comparison purposes only) 17 17
Hardness, Vickers (converted from Brinell hardness) 228 228
Machinability (annealed and cold drawn. Based on 100 machinability for AISI 1212 steel.) 50 50

AMS 6454 Equivalents

AMS 6359 AMS 6454 ASTM A331 (4340) ASTM A711 SAE J1397 (4340)
AMS 6409 ASTM A29 (4340) ASTM A506 (4340) ASTM A752 (4340) SAE J404 (4340)
AMS 6414 ASTM A320 (L43) ASTM A519 (4340) ASTM A829 SAE J412 (4340)
AMS 6415 ASTM A322 (4340) ASTM A646 (4340-7) MIL S-5000

AMS 6454 Uses

AMS 6454 is used in several critical applications in various industries, particularly the aerospace and defence industries. It is used to manufacture landing gear components, aircraft engine parts, and missile parts. It is also widely used in automotive and heavy equipment components, particularly in high-stress areas such as gears and shafts.

AMS 6454 Hardness

AMS 6454 is known for its high hardness. Its hardness can be enhanced to various degrees through heat treatment. The hardness of this alloy is vital in ensuring it keeps its shape and maintains its mechanical properties even under extreme loading conditions. The hardness range for AMS 6454 can be anywhere from 45-52 HRC.

AMS 6454 Heat treatment

AMS 6454 is a heat-treated alloy that is thermally stable and has excellent heat resistance. Heat treatment is crucial in enhancing its hardness and strength. The heat treatment process involves austenitizing, quenching, tempering, and annealing. The specific method and heat treatment temperature depend on the manufacturer’s specifications and the desired properties.


AMS 6454 material is a high-strength alloy that has gained acceptance in various industries for its excellent mechanical and physical properties. Its high strength, durability, and corrosion resistance make it a preferred choice for critical components in the aerospace, defence, and automotive industries. It is a heat-treated alloy and requires tempering to achieve specific hardness ranges. Its hardness and heat resistance make it an ideal material for applications that encounter high stress and extreme conditions. With its unique composition and high-quality properties, AMS 6454 is an alloy that will continue to be a reliable component in critical industries.

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