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8620 Steel

Discover the metallurgical properties of 8620 steel and its diverse applications

The 8620 steel has nickel content providing it with good ductility and toughness, while its chromium and molybdenum components improve its wear resistance and hardness penetration.

One of the key benefits of 8620 bar is its versatility in a wide range of industries. It is commonly used in the production of gears, shafts, and other components in the automotive, aerospace, and defense sectors. Its toughness and wear resistance make it ideal for applications that require high stress, such as heavy machinery, mining equipment, and oil drilling rigs.

Carbon Round Bar Steel Purchaser

High External Strength, Good Internal Strength 8620 Round Bar

The 8620 round bar is a popular steel grade for making bars. It is known for its high tensile strength of 86,200 psi, excellent machinability, and malleability. This type of steel is used for various purposes, such as making axles, gears, shafts, screws, bolts, and other fasteners.

The benefits of 8620 alloy steel are numerous. This type of steel is made of manganese, nickel, and chromium, which makes it highly durable. It has a high strength-to-weight ratio and can be used in various applications, including automotive parts, structural beams, gears, and more.

Moreover, the 8620 alloy steel is low-carbon steel with a high strength-to-weight ratio. It is easy to machine and weld and resistant to atmospheric and general corrosion, making it ideal for projects that require long-term use in corrosive environments. It is commonly used in structural supports, axles, gears, shafts, and couplings.

The 8620 round bar has some advantages over other steel bars. First, it is easier to machine due to its low hardness. Second, it is more accessible to weld because of its low carbon content. Third, it has a good balance between strength and toughness.

The 8620 alloy steel is characterized by a hard outer case with a soft, ductile core, making it highly wear-resistant. It is also flexible during hardening treatments, responds well to polishing, and has good machinability. However, it will not respond satisfactorily to induction hardening due to its low carbon content. Nitriding can further surface harden this type of alloy steel.

The Science Behind 8620 Steel - Understanding its Chemical Composition

Density0.282 lb/in³
Tensile Strength 76900 psi
Yield Strength 55800 psi
Elastic Modulus 27557-30458 ksi
Hardness (Brinell) 149
Hardness (Knoop) 169
Hardness (Rockwell B) 80
Hardness (Vickers) 155
Machinability 65
Carbon 0.18-0.23
Chromium 0.40-0.60
Manganese 0.70-0.90
Phosphorus 0.040 max
Sulfur 0.040 max
Nickel 0.40-0.70
Molybdenum 0.15-0.25
Silicon 0.20-0.35

Why 8620 Steel is the Go-To Material for Tough and Resilient Gear Applications

When it comes to manufacturing gears that can withstand high-stress applications, the 8620 round bar is the material of choice. Its unique composition makes it ideal for gear production, providing exceptional strength and durability even in extreme conditions.

Chemical Composition

8620 alloy steel is a low-alloy steel that contains a blend of chromium, molybdenum, and nickel. This combination of elements enhances hardenability and tensile strength, making it ideal for high-stress applications. Additionally, the carbon content in 8620 is relatively low, which improves its weldability and machinability.


The properties of 8620 round bar make it ideal for gear production, as it provides exceptional strength, toughness, and wear resistance. Its high tensile strength and hardness make it suitable for gears subjected to heavy loads, shocks, and impacts. Furthermore, 8620 alloy steel is highly resistant to abrasion and wear, ensuring the longevity of the gears.


8620 steel is commonly used to produce gears for various applications, including automotive, aerospace, and heavy machinery. Its strength and durability make it ideal for gears in transmissions, axles, and differentials in automobiles, trucks, and off-road vehicles. It is also used in industrial and agricultural gearboxes such as excavators, tractors, and harvesters. In the aerospace industry, 8620 alloy steel help in producing gears for engines, landing gears, and flight control systems.

Purchase the 8620 Round Bar!

The unique strength, toughness, and wear resistance make 8620 round bar ideal for gear production in high-stress applications. Its versatility and durability have made it popular among various industries, from automotive to aerospace. With its exceptional properties and benefits, it is no wonder why 8620 alloy steel is the go-to material for tough and resilient gear applications.

Advance Grinding steps up its game to fulfill all your 8620 alloy steel bar needs. With us, you can be assured that our steel bars are thoroughly tested, analyzed, and verified to be excellent quality.

So if you need a high-quality 8620 round bar, give us a call or request a quote from us today!