8620 Steel vs 9310 Steel – What’s the Difference

8620 Steel vs 9310 Steel

Steel is one of the most widely used materials in industrial manufacturing. It’s used to make everything from automotive parts to firearms. However, not all steel is created equal. In this blog, we’ll discuss the differences between two types of steel – 8620 steel and 9310 steel.

Difference Between 8620 Steel and 9310 Steel


The first difference between 8620 and 9310 steel is their composition. 8620 steel is a low alloy nickel, chromium, and molybdenum case hardening steel. It contains 0.18-0.23% carbon, 0.7-0.9% manganese, 0.4-0.6% chromium, and 0.15-0.25% molybdenum. In contrast, 9310 steel is a low alloy that contains nickel, chromium, and molybdenum and has a higher carbon content of 0.08-0.15%. Also, 9310 steel has more nickel and molybdenum than 8620 steel.


The second difference between these two types of steel lies in their hardness. 8620 steel has a lower hardness than 9310 steel, making it easier to machine. However, it’s less durable than 9310 steel and doesn’t hold well under high-stress or high-impact applications. 9310 steel, on the other hand, has a higher hardness than 8620 steel, making it more resistant to wear and tear.


The third difference is in their cost. 8620 steel is more readily available than 9310 steel and is less expensive to produce. Therefore, it’s typically less expensive to purchase 8620 steel than 9310 steel.


The fourth difference is in their applications. 8620 steel is often used to produce gears, shafts, and other mechanical parts that require case hardening. It’s also commonly used in the automotive industry for crankshafts, camshafts, and transmission parts. 9310 steel, on the other hand, is typically used in producing gun parts, particularly high-stress components such as bolt carriers and barrels.


The final difference is in their machinability. 8620 steel is easier to machine than 9310 steel, which makes it a popular choice for manufacturing processes that involve much machining. However, 9310 steel is still machinable and can be used for various products.


In conclusion, both 8620 steel and 9310 steel have unique properties and applications. 8620 steel is a low-cost, readily available steel commonly used in the automotive industry and for mechanical parts requiring case hardening. 9310 steel, on the other hand, is a high-strength steel commonly used in high-impact applications, such as gun parts. Understanding the differences between these two types of steel will help you make an informed decision when selecting a steel type for your manufacturing needs.

Harsh Jain

Harsh Jain

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