4140 plate material

What is 4140 steel?

A：Yesterday, I saw a large truck of steel plates transported into our warehouse.

B：I know that is our 4140 steel. Now we have 1,500 tons of 4140 steel!

A：That’s great! However, some customers don’t know the properties of 4140 steel very well, or what it can be used for.

B：Then we can talk about what is 4140 steel(4140 plate material).

A：4140 steel belongs to the alloy structural steel. After Quenching & Tempering, its hardness is 28-34 HRC.

B：4140 steel used for bending machine molds.

A：Besides, it can be used to under 2000m deep well of oil drill pipe joint and fishing tool.

B：Also, it can be used for engineering structural parts, like high tensile shafts, gears, pinions, and spindles.

A：I have a question. 4140 steel is a kind of alloy structural steel, does it have anti-rust performance?

B：The common stainless steel’s chromium content is higher than 12.5%. So it has anti-rust performance.

A：From the analysis of the composition, 4140 steel also has chromium. But its chromium content is only 0.8%-1.1%, which is far lower than the standard for rust prevention.

B：Therefore, 4140 steel is not stainless steel. Please pay attention to its rust prevention when using it.

A：But 4140 steel can be used to make gears. Because lubricating oil is often used when gears are running. The lubricating oil can protect the gear from rust while protecting the normal operation of the gear.

B：The above is about the properties and uses of 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.