ThePipingMart Blog Grades AISI 8627 Alloy Steel (UNS G86270) – Composition, Properties and Uses

AISI 8627 Alloy Steel (UNS G86270) – Composition, Properties and Uses

AISI 8627 Steel

AISI 8627 is a type of steel that has been around since the late 19th century. It is an alloy steel with a combination of manganese, chromium, and molybdenum. AISI 8627 steel is known for its strength, toughness, and malleability. It also has a high resistance to corrosion and heat treatment. The AISI 8627 Alloy Steel, also known as UNS G86270 and SAE-AISI 8627 steel, is a low carbon case-hardening steel that belongs to the group of nickel-chromium-molybdenum (NiCrMo) steels. Its composition includes nickel, which enhances its toughness and hardenability, chromium, which provides corrosion resistance, and molybdenum, which improves its strength and machinability. This alloy steel is widely used in the automotive and aerospace industries for manufacturing gears, axles, and cams due to its excellent wear resistance, surface hardness, and fatigue strength. The AISI 8627 Alloy Steel demonstrates impressive mechanical properties and can be heat-treated to achieve specific physical properties desired for a given application. With its unique combination of alloying elements, it is undoubtedly one of the most versatile materials in the engineering world. Let’s take a closer look at the advantages of using UNS G86270 steel in machining and fabrication applications.

What Forms of AISI 1526 is Available at Piping Mart?

  • Nut
  • Bar
  • Bolt
  • Pipe
  • Screw
  • Tubing
  • Valves
  • Washers
  • Flanges
  • Fasteners
  • Electrodes
  • Stud Bolts
  • Sheet Plates
  • Pipe Fittings
  • Forged Fitting
  • Instrumentation Fittings

AISI 8627 Composition

Element Content (%)
Iron, Fe 96.87 – 97.95
Manganese, Mn 0.700 – 0.900
Nickel, Ni 0.400 – 0.700
Chromium, Cr 0.400 – 0.600
Carbon, C 0.250 – 0.300
Silicon, Si 0.150 – 0.300
Molybdenum, Mo 0.150 – 0.250
Sulfur, S ≤ 0.0450
Phosphorous, P ≤ 0.0350

AISI 8627 Physical Properties

Properties Metric Imperial
Density 7.85 g/cm3 0.284 lb/in³

AISI 8627 Mechanical Properties

Properties Metric Imperial
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
Hardness, Brinell (annealed and cold drawn) 179 – 223 179 – 223
Hardness, Knoop (converted from Brinell hardness) 223 223
Hardness, Rockwell B (converted from Brinell hardness) 93 93
Hardness, Rockwell C (converted from Brinell hardness. Value below normal HRC range, for comparison only) 13 13
Hardness, Vickers (converted from Brinell hardness) 211 211
Machinability (annealed and cold drawn. Based on AISI 1212 steel. as 100 average machinabibity) 60 60

AISI 8627 Thermal Properties

Properties Metric Imperial
Thermal conductivity (typical steel) 46.6 W/mK 323 BTU in/hr.ft².°F

AISI 8627 Equivalent

  • ASTM A29
  • ASTM A322
  • ASTM A331
  • ASTM A519
  • ASTM A752
  • ASTM A829
  • SAE J1397
  • SAE J404
  • SAE J770

AISI 8627 Uses

AISI 8627 Alloy Steel (UNS G86270) is a versatile material used in various applications. With its high strength and toughness, it is commonly used to manufacture shafts, gears, and other mechanical parts that require durability and resistance to wear. Due to its excellent weldability, AISI 8627 Alloy Steel is frequently used in fabrication processes. Additionally, it has found its way into the oil and gas industry, where it is utilized in drilling and completion equipment. The unique properties of this steel make it an ideal choice in many different situations, from industrial machinery to automotive components. Its versatility and reliability have made it a go-to material for engineers and manufacturers worldwide.

AISI 8627 Uses in Industries

  • Automotive Industry
  • Aerospace Industry
  • Oil and Gas Industry
  • Construction Industry
  • Machinery Manufacturing

AISI 8627 Corrosion Resistance

8627 Alloy Steel is an alloy steel that offers excellent corrosion resistance when compared to plain carbon steel. This makes it ideal for use in environments where corrosive substances are present, such as those found in certain industrial or marine settings. The addition of chromium helps to provide increased protection against rusting and pitting due to the formation of a thin layer of chromium oxide on the metal’s surface, preventing further oxidation.

AISI 8627 Heat Resistance

AISI 8627 also offers excellent heat resistance compared to other steel alloys. This makes it well-suited for use in high-temperature applications such as furnaces or boilers where temperatures can reach up to 1000° Celsius (1,830° Fahrenheit). The addition of molybdenum helps to further increase its ability to withstand extreme heat without becoming brittle or losing its strength.

AISI 8627 Heat Treatment

AISI 8627 can be heat treated in order to achieve desired properties such as improved hardness and strength. Heat treatment involves heating the metal up to specified temperatures before quenching it rapidly in oil or water, depending on what properties you want to achieve from the process. This allows you to tailor-make specific components out of AISI 8627 that will meet your exact requirements for any given application.

AISI 8627 Machining

AISI 8627 is also easy to machine due to its malleable nature, which enables it to be cut into intricate shapes with ease using conventional machining techniques such as drilling, tapping, milling, and turning. Its good wear resistance also means that cutting tools will last longer when used on this metal than they would with other materials such as aluminium or brass. This makes it perfect for use in parts manufacturing, where accuracy and precision are paramount.


In conclusion, AISI 8627 offers numerous benefits when used in machining and fabrication applications thanks to its excellent corrosion resistance, heat resistance, heat treatment capabilities, and machinability properties. Whether you’re looking for a durable material for industrial equipment or something more precise for parts manufacturing – AISI 8627 could be just what you need! If you’re looking for more information about how this alloy could help your business succeed, feel free to contact Metric Marketing today! We have years of experience helping companies find the right solutions for their needs!

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