o6 ToolSteel Round Bar Stock

O6 toolsteel round bar stock is a high carbon steel that is classified as oil-hardening cold-work steel that contains manganese, molybdenum, and silicon.

Reduce galling with quality O6 toolsteel round bar stock

O6 toolsteel round bar stock is a high carbon steel that is classified as oil-hardening cold-work steel that contains manganese, molybdenum, and silicon. O6 toolsteel bar stock can reduce galling and seizing of fully hardened steel which improves the machinability of annealed stock since graphite is present within its microstructure. The chemical composition of o6 toolsteel bar stock consists of the following elements: carbon 1.25 – 1.55%, silicon 0.55 – 1.50%, manganese 0.30 – 1.10%, chromium 0.3%, nickel 0.3%, copper 0.25%, molybdenum 0.20 – 0.30%, phosphorus 0.03%, and sulfur 0.03%. The physical properties of this metal are 7.67 g/cm3 in density and as for its mechanical properties it consists of the following: elastic modulus 190 – 210 GPa, Poisson’s ratio (25C) 0.027 – 0.30, bulk modulus 140 GPa, shear modulus 80.0 GPa, hardness Rockwell C 65, hardness Knoop (converted from Rockwell C hardness) 850, hardness, Brinell (converted from Rockwell C hardness) 752, Machinability (based on 100% machinability for 1% carbon toolsteel) 130.

Steel Purchaser

Cost-affordable toolsteel at your fingertips

Advance Grinding has the right kind of steel that you need to help you keep up with your business or latest venture. If you want to acquire the best o6 toolsteel round bar stock forged in the industry, then you’ll be happy to know that Advance Grinding can provide you with just that. We understand the value of supplying our clients with quality metal, which is precisely why you should trust us, to supply you with top-tier, high-quality metals. Contact us here at Advance Grinding today, so that you can get a quote on the alloy that you need. We’ll make sure that you’re equipped to take on any project you have to face by providing you with hardy material that you can rely on.


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

Consequently, its high machinability 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!


Density 7.7-8.0
Tensile Strength 95000 psi
Yield Strength 60200 psi
Hardness (Brinell) 197
Hardness (Knoop) 219
Hardness (Rockwell) 92
Hardness (Vickers) 207
Machinability 65


With excellent toughness, high fatigue strength, and outstanding machinability, 4140 Alloy Steel has indeed become a staple for most industries in the Midwest.

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!