4140 vs 8620

4140 vs 8620 : what is the difference between 4140 steel and 8620 steel?

A： Today we are still discussing 4140 steel. As we know that 4140 steel belongs to the alloy structural steel.

B： I found a steel that is very similar to 4140 steel—8620 alloy steel.

A： From the analysis of the composition, they all contain Chromium and molybdenum.

B： Yes. But the carbon content of 4140 steel is 0.38%-0.43%, while the carbon content of 8620 steel is 0.18%-0.23%.

A： From the analysis of the hardness, 4140 steel is usually supplied ready heat treated to hardness in 18-22 HRC.

B：8620 alloy steel’s hardness is 25HRC.

A： In terms of use, 4140 steel can be used for engineering structural parts, like high tensile shafts and gears.

B：8620 steel is used extensively by all industry sectors for light to medium stressed components and shafts requiring high surface wear resistance with reasonable core strength and impact properties

A： So what is the difference between them?

B：8620 steel is suited for applications that require a combination of toughness and wear resistance. This grade is commonly supplied in a round bar.

A：I hope that customers should consider what kind of performance you need for the steel that you purchase and then buy on demand.

B： By the way, for 4140 steel, we can supply the round bar, steel flat bar, and plate.

A： Rectangular pieces can be cut from flat bar or plate to your specific sizes.

B： The above is about the difference between 8620 steel and 4140 steel. If you want to know more, you can visit our website：www.otaisteel.com

A： You can also send an email or call us.

Otai does not act as a material handler. We possess proprietary technology and continuously iterate. We undertake every order to end and solve customer’s problems without any hesitation on responsibility. We are welcome to your kind inquiry.