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A2 Tool Steel

A2 Tool Steel – The Cutting-Edge Choice for Precision Manufacturing

What is A2 Tool Steel?

A2 tool steel round bar stock is a versatile material that combines good toughness with excellent dimensional stability when heat-treated. Although its wear resistance falls between high-carbon, high-chromium D2 tool steel and oil-hardening O1 tool steel, this grade provides a strong and tough combination.

A2 round bar is used for a variety of applications, including chuck jaws, woodworking cutting tools, dowel pins, hammers, plastic injection tooling, punches and dies, gauges, and industrial knives.

The composition of A2 round bar Cr 5.0, Mo 1.00, and V 0.25. Additionally, it has a density of 7861 kg/m3, a specific gravity of 7.86, a modulus of elasticity of 30×106 psi (207GPa), and a machinability rating of 70% compared to 1% carbon steel.

Overall, A2 round bar is a strong and versatile material that is ideal for a wide range of industrial applications. Its combination of toughness and dimensional stability make it a popular choice among tool makers and machinists.

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Choose A Realiable A2 Tool Steel Supplier

At Advance Grinding Services, we have the steel you need to keep your business or latest venture running smoothly. We offer the best A2 round bar stock in the industry, and we’re committed to providing our clients with top-tier, high-quality metals.

We understand the importance of supplying our clients with quality materials, and that’s why you can trust us to provide you with the best alloy for your needs. Contact Advance Grinding today to get a quote on the steel you require.

Our high-quality materials will ensure that you’re equipped to take on any project with confidence. Trust us to provide you with the reliable, hardy material you need to succeed.


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

A2 Round Bar Applications

A2 tool steel stock has become a staple for many industries in the Midwest due to its excellent toughness, high fatigue strength, and outstanding machinability. Specifically, A2 round bar, a type of steel known for its tough and durable qualities, has been used in the automotive industry for decades.

This steel is favored for its ability to be machined to precise tolerances, high strength-to-weight ratio, and capacity to withstand high temperatures without deforming. These features make it an ideal material for manufacturing auto parts such as axles, gears, and engine blocks.

Aside from the automotive industry, A2 tool steel stock is widely used in various sectors, such as mining, construction, and more, for making blades, knives, axles, and gears. It is also easier to work with compared to other steel types because it is easier to cut, drill, form, and shape and requires less machining time.

The A2 round bar, used in making bars and rods, offers many advantages, including its ease of machining, ability to be tempered for different properties, and excellent corrosion resistance. Whatever your industry, Advance Grinding Services can provide you with high-quality stocks for all your specific applications.

To acquire this steel, simply give us a call or request a quote from our website today!