ThePipingMart Blog Grades AMS 5858 Stainless Steel Alloy – Composition, Properties, and Uses

AMS 5858 Stainless Steel Alloy – Composition, Properties, and Uses

AMS 5858

Aerospace materials are essential in the aviation industry to manufacture various aircraft parts such as engine components, landing gear, and structural frames. One such material is AMS 5858, frequently used in the aerospace market. This blog post will provide a comprehensive guide on AMS 5858, including its composition, physical and mechanical properties, uses, hardness, and heat treatment.

What is AMS 5858?

AMS 5858 (also known as Stainless Steel A286) is a specification created by the Aerospace Materials Division of the Society of Automotive Engineers. This specification outlines the requirements for a nickel alloy known as Inconel 718, used in high-stress applications such as aircraft engines and gas turbines. The alloy has exceptional strength, durability, and high-temperature resistance, making it perfect for use in these demanding environments. Besides, the alloy’s excellent forming and welding characteristics make it a go-to choice for manufacturers looking to craft intricate parts. In conclusion, AMS5858 plays a vital role in the aerospace and gas turbine industries, where the highest performance and efficiency standards are required.

AMS 5858 Composition

AMS 5858 is a nickel-based superalloy often used in the aerospace industry, specifically in producing engine components that require high strength at high temperatures. The composition of AMS 5858 contains approximately 59% nickel, 19% chromium, 12.5% cobalt, 3.2% titanium, 2.2% aluminium, and 0.15% carbon.

Element Content (%)
Iron, Fe 54
Nickel, Ni 25.5
Chromium, Cr 14.8
Titanium, Ti 2.13
Molybdenum, Mo 1.30
Manganese, Mn 1.0
Silicon, Si 0.50
Vanadium, V 0.30
Aluminum, Al 0.18
Carbon, C 0.040
Phosphorous, P 0.020
Sulfur, S 0.015
Boron, B 0.0060

AMS 5858 Physical Properties

The specific gravity of AMS 5858 ranges between 8.1 to 8.3, making it a relatively dense material. It has a low thermal expansion coefficient of 12.5 µm/m℃ and a melting point of approximately 1350℃. Additionally, this superalloy has excellent corrosion resistance, making it ideal for use in harsh environments.

Properties Metric Imperial
Density 7.92 g/cm3 0.286 lb/in3
Melting point 1399°C 2550°F

AMS 5858 Mechanical Properties

AMS 5858 sheet has exceptional mechanical properties, crucial in the aerospace industry. It has high strength at elevated temperatures and excellent fatigue resistance. The material exhibits exceptional creep resistance, which means it can withstand a consistent load without deformation or damage from prolonged exposure to high temperatures.

Properties Metric Imperial
Tensile strength 1035 MPa 150100 psi
Yield strength (@strain 0.200%) 759 MPa 110000 psi
Elongation at break 25% 25%
Reduction of area 40% 40%
Hardness, Brinell (estimated from Rockwell C value for Brinell test with 3000 kg load/10 mm diameter ball) 304 304
Hardness, Knoop (estimated from Rockwell C value) 330 330
Hardness, Rockwell C 32 32
Hardness, Vickers (estimated from Rockwell C value) 318 318

AMS 5858 Equivalent

AISI 660 AMS 5525 AMS 5726 AMS 5732 AMS 5734
AMS 5731 AISI 662 AMS 5737 AMS 5804 AMS 5895
AMS 5853 AMS 5805 UNS S66286 DIN 1.4943 SPS M250
DIN 1.4944 GE B50T81 GE B50T12 GE B50T1181 ASTM A453 Grade 660
ASTM A638 Grade 660 stainless steel A-286

AMS 5858 Uses

AMS 5858 bars is typically used in gas turbine engine components such as turbine blades, combustion chambers, and high-pressure compressor discs. It can also be found in land-based power turbines to produce electricity. The material’s properties make AMS 5858 a suitable component for aircraft engines requiring high temperature, high strength, and resistance to harsh environments.

AMS 5858 Hardness

The hardness of AMS 5858 depends on the specific heat treatment process applied. Typically, the material is used in a solution-treated or annealed condition, where its hardness ranges from 170 to 250 HB. However, through ageing or work hardening, its hardness can increase significantly.

AMS 5858 Heat Treatment

AMS 5858 is typically heat-treated by annealing or solution treatment at around 1090℃. This process provides the material with the optimal microstructure and flexibility essential for its mechanical and physical characteristics.


AMS 5858 material is a nickel-based superalloy highly valued in the aerospace industry, primarily due to its exceptional properties, including high strength at high temperatures, fatigue resistance, and creep resistance. Its composition, physical and mechanical properties make it ideal for gas turbine engine components, including turbine blades, combustion chambers, and high-pressure compressor discs. This material can possess optimal ductility and microstructure through appropriate heat treatment, allowing machinery designers and engineers to deliver safe, efficient machinery with high-performing materials.

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