4140 Steel Bar Stock: What is 4140 Steel Used For?

The 4140 round bar is widely used across numerous industries and is considered to be an excellent material choice due to its physical and structural toughness.

4140 bar stock AND 4140 STEEL USES

Industries get hold of a 4140 bar stock simply because of its high-fatigue strength, toughness, impact, and abrasion resistance.

The 4140 bar stock alloy steel has such types of characteristics because of its chemical components of chromium, molybdenum, and manganese.

The addition of chromium and molybdenum promotes an excellent resistance to corrosion while manganese helps in increasing its hardenability as well as its machinability.

With these excellent chemical components within the 4140 alloy steel, it’s understandable why a lot of industries acquire 4140 bar stock and 4140 steel bars for their various applications. 

Steel Purchaser


As such, it is now understandable why this type of alloy steel is sought after getting a quick review of its components.

Consequently, the high machinability of a 4140 steel bar is highlighted as it is commonly combined with sulfur to further improve its machinability and make carburizing processes more effective.

With its excellent machinability, this even elevated this alloy steel’s prominence among industries.

Fortunately, Advance Grinding Services never runs out of 4140 alloy steel bars and can very much supply your needs especially if you are operating in the Illinois area!



4140 bar stock is a standard steel grade in the United States. It is general-purpose structural steel with good yield strength and is widely used in the construction and manufacturing industries, which is why you can find many 4140 steel bar suppliers.

Moreover, 4140 steel bar suppliers are crucial for producing 4140 steel bar stock. They provide the raw materials to make 4140 steel bars. As such, they are highly sought after by manufacturers who need these materials to produce their products.

4140 steel bar suppliers are an essential part of any metal fabrication company. Also, the best 4140 steel bar suppliers, like Advance Grinding Services, have various products to choose from, including hot-rolled bars, cold-rolled bars, cut-to-length bars, and cut-to-length bars with threading round bars, and square bars.

Tensile Strength95000 psi
Yield Strength60200 psi
Hardness (Brinell)197
Hardness (Knoop)219
Hardness (Rockwell)92
Hardness (Vickers)207


With excellent toughness, high fatigue strength, and outstanding machinability, 4140 Alloy Steel has indeed become a staple for most industries in the Midwest.  It’s hard to believe that 4140 steel round bar has been around for so long. Because of its high strength-to-weight ratio, it is a popular steel alloy. Because of its strength, corrosion, and heat resistance, 4140 bar steel is a standard round bar material.

There are many uses for the 4140 bar type steel, from aircraft components to automotive parts, mining equipment, power generation, railroad components, and structural components for bridges and construction projects. For various purposes, 4140 bar steel is a popular material choice. In the automotive, aerospace, and structural industries, it’s commonly employed. ‘ Many things can be made from 4140 round bar, one of the most prevalent shapes. Producing circular bars of varying diameters and lengths is a snap with this form.

In the automotive, construction, and aerospace industries, 4140 steel bar is commonly used. Rails, beams, and machine parts are all made from this material. Alloy steel, known as 4140 has been used extensively in the aerospace industry and other high-performance sectors for decades. It is a form of 4140 alloy steel that has been shaped into round bars. Advance Grinding Services got you covered from 2 to 24 inches in diameter and 36 to 96 inches in length! They’re most commonly used in automotive applications like brake drums and rotors, but they can also be found in various places.

In the automotive sector, 4140 steel bar stock is a common material. It is employed in the construction of automobile and truck frames and chassis. The solid strength-to-weight ratio and corrosion resistance of the 4140 steel bar stock has made it popular in the automobile industry. At average temperature, the tensile strength of a 4140 steel round bar is 95,000 psi.

This steel bar type is commonly employed in construction because of its ability to bear high pressures while preserving its shape. Building frames and reinforcing concrete structures can also benefit from 4140 round bar. Its yield strength is superior to any other steel type, making 4140 bar stock an excellent material for bearings. For the automotive industry, 4140 alloy steel is used in the creation of engine gears, bolts and nuts, and crankshafts while for the oil and gas industry, 4140 alloy steel is utilized in the creation of spindles, couplings, and other mechanical parts.  

Whatever industry you are from, rest assured that Advance Grinding Services can provide you with a 4140 alloy steel round bar stock for all your specific industry applications.  

Give us a call or simply request a quote from our website and acquire a high-quality 4140 alloy steel round bar stock today!