4140 vs 4130

4140 vs 4130 : what is the difference between 4140 steel and 4130 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—4130 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 4130 steel is 0.28%-0.33%.

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

B：4130 alloy steel’s hardness is 17HRC.

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

B：4130 steel finds many applications as forgings in the aerospace and oil and gas industries – as forged valve bodies and pumps. 

A： So what is the difference between them?

B：4130 steel is similar to 4140 steel which has a higher carbon level, giving 4130 steel improved weld ability, at the expense of through-thickness strength.

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

B： The above is about the difference between P20 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.