Alloy Steel

Precision CNC Alloy Steel Machining Services for Complex Components

Owens Industries provides alloy steel machining services for complex, high-precision components nationwide. We use advanced CNC technology and state-of-the-art equipment to machine alloy steel and other challenging materials to tolerances as tight as 0.0005". Our CNC machining capabilities include 4-axis and 5-axis milling, Swiss machining, micromachining, turning, milling, wire EDM and sinker EDM.

Our alloy steel CNC machining services are tailored to meet exact specifications, supporting high-performance applications across demanding industries. Rigorous quality control and inspection processes maintain consistent, high-quality results in every machined alloy steel component. Contact us today to request a quote.

Request a Quote

Owens Industries

Alloy Steel Machining Services For Your Industry

Since 1944, engineers and designers have relied on Owens Industries for alloy steel machining services. Our advanced CNC equipment supports ultra-precision machining of alloy steel components with tight tolerances and complex geometries. We deliver precision alloy steel machining services for a wide range of industries, making Owens Industries a trusted partner for demanding applications:

Types & Grades of Alloy Steel for CNC Machining Services

Our machining services use a wide range of alloy steel grades to match exact performance requirements. Each alloy offers unique mechanical properties suited for specific applications, from high-strength structural components to wear-resistant tooling. We machine many types and grades of alloy steel, including:

Request a Quote

Alloy Steel 1.7131

Alloy Steel 1.7131, also known as 16MnCr5, is a case-hardening steel with excellent wear resistance and strength. It is often used for manufacturing gears, shafts and other transmission components due to its high surface hardness and toughness. The addition of manganese and chromium provides improved hardenability and wear resistance. 1.7131 steel is easily machinable in the annealed condition and responds well to heat treatment.

Alloy Steel 4140

Alloy Steel 4140, chromium-molybdenum steel, is known for its high tensile strength, toughness and fatigue resistance. It is widely used in manufacturing automotive components, axles and oil and gas industry equipment. 4140 steel can be heat-treated to achieve a wide range of mechanical properties and has good machinability in the annealed condition. Its versatility makes 4140 a popular choice for applications requiring strength and impact resistance.

Alloy Steel 1.7225

Alloy Steel 1.7225, also known as 42CrMo4, is a chromium-molybdenum steel with excellent strength and toughness. It is commonly used in the automotive and aerospace industries for high-strength components like crankshafts, gears and connecting rods. 1.7225 alloy steel offers good hardenability and is suitable for various heat treatment processes. Its high fatigue strength makes 1.7225 ideal for applications where wear and impact resistance are crucial.

Alloy Steel 4340

Alloy Steel 4340 is a nickel-chromium-molybdenum steel with exceptional strength and toughness. It is commonly used in aerospace and automotive applications, including aircraft landing gear, axles and high-performance engine components. 4340 steel has excellent hardenability and responds well to heat treatment, making it suitable for demanding strength and toughness requirements. Its good machinability and durability make 4340 a popular choice for demanding applications.

Alloy Steel 1215

Alloy Steel 1215 is a low-carbon, resulfurized free-machining steel with excellent machinability and surface finish. It is often used for high-speed screw machine parts, bushings, fittings and other applications where good surface finish and dimensional accuracy are critical. However, due to its low carbon content, 1215 has lower strength and hardenability than other alloy steels. It is best suited for applications where high strength or wear resistance are not required.

Alloy Steel 1018

Alloy Steel 1018 is a low-carbon steel with good ductility, weldability and machinability. 1018 is often used for general-purpose applications like structural components, shafts and gears. Although it does not have the high strength or hardenability of other alloy steels, 1018 can be case-hardened to improve its wear resistance. Its excellent formability makes it a popular choice for applications requiring easy fabrication and machining.

Alloy Steel 4130

Alloy Steel 4130, a chromium-molybdenum steel, is known for its high strength, toughness and resistance to atmospheric corrosion. 4130 is widely used in the aerospace and automotive industries for manufacturing structural components, such as aircraft frames and automotive roll cages. 4130 steel offers good weldability and responds well to heat treatment, making it suitable for various strength requirements. Its combination of strength and ductility makes 4130 an ideal choice for demanding applications.

Alloy Steel 4140 PH

Alloy Steel 4140 PH (pre-hardened) is a heat-treated version of 4140 alloy steel with a specific hardness and strength level. This pre-hardened steel offers excellent strength, toughness and fatigue resistance, making it suitable for applications requiring high mechanical properties without additional heat treatment. Common uses include gears, shafts and heavy-duty machinery components. While its machinability is lower than annealed 4140, 4140 PH still provides a good balance between strength and machinability for various applications.

Alloy Steel A36

Alloy Steel A36 is a low-carbon structural steel known for its excellent weldability, formability and machinability. It is widely used in construction, including structural components such as beams, columns and support plates. Although A36 does not offer the high strength or hardenability of other alloy steels, it provides good ductility and impact resistance. Its versatility and ease of fabrication make A36 a popular choice for construction projects.

A2 Tool Steel

A2 Tool Steel is an air-hardening, medium-alloy, cold-work tool steel with excellent dimensional stability and wear resistance. It is commonly used for making cutting tools, dies and punches, particularly in applications requiring high wear resistance and moderate toughness. A2 Tool Steel offers good machinability and can be heat-treated to achieve various hardness levels and desired mechanical properties. Its combination of wear resistance and dimensional stability makes A2 Tool Steel ideal for precision tooling applications.

O1 Tool Steel

O1 Tool Steel is an oil-hardening, high-carbon, cold-work tool steel known for its excellent wear resistance, dimensional stability and toughness. It is commonly used for making cutting tools, dies and punches in applications where precision and long tool life are critical. O1 Tool Steel offers good machinability and responds well to heat treatment, allowing for a wide range of hardness levels and mechanical properties. Its combination of wear resistance, stability and toughness makes O1 Tool Steel a popular choice for high-quality tooling applications.

Precision Machined Alloy Steel Components

Owens Industries delivers precision alloy steel machining services backed by decades of experience and ultra-tight tolerances. Our team machines complex components, such as gearboxes, engine blocks, crankshafts, and more, using advanced CNC processes. We serve customers across the United States from our Wisconsin CNC machining facility, supporting industries with demanding performance requirements.

Explore our CNC product image gallery and video gallery to view completed alloy steel machining projects.

Example alloy steel components include:

Construction Components: beams, columns and fasteners
Transportation Components: truck, train and marine parts
Energy Components: oil and gas pipelines and drilling equipment
Mining Equipment Components: crushers and conveyors
Agricultural Equipment Components: plows and harvesters
Industrial Machinery Components: gears, shafts and bearings
Power Generation Components: turbines and generators
Defense Components: armor plating and weapon systems

Interested in alloy steel machining services for your component? Contact Owens Industries today.

Properties of Alloy Steel in CNC Machining

Alloy Steel	Tensile Strength (MPa)	Yield (MPa)	Shear Modulus (GPa)	Elongation at Break (%)	Hardness (Brinell)	Density (g/cm³)
1.7131	800 - 1100	640	80	8 - 14	170 - 210	7.8
4140	860 - 1040	460 - 655	80	12 - 28	180 - 320	7.8
1.7225	900 - 1200	750	80	10 - 14	200 - 225	7.8
4340	1080 - 1280	880	80	12 - 22	217 - 302	7.85
1215	430 - 530	250 - 370	75	10 - 15	120 - 170	7.85
1018	420 - 490	350 - 420	80	15 - 20	120 - 160	7.87
4130	560 - 1040	460 - 630	80	10 - 25	180 - 270	7.85
4140 PH	1000 - 1300	850 - 1100	80	10 - 20	270 - 320	7.8
A36	400 - 550	250	80	20 - 23	120 - 160	7.85
A2 Tool Steel	1725 - 2070	1400 - 1800	78	5 - 10	207 - 269	7.86
O1 Tool Steel	670 - 2140	570 - 1900	80	5 - 12	170 - 230	7.87

Alloy Steel CNC Services and Capabilities

Precision Machining

5-Axis Machining

EDM Services

Mill Turn Machining

CNC Lathe Machining

3D Printing

All CNC Services

Cutting Edge CNC Machines for Ultra-Precision Components

Owens Industries machines complex, tight-tolerance components using advanced German and Swiss CNC equipment built for ultra-precise manufacturing. Our CNC machines support high-spec industries where accuracy, repeatability and consistency directly impact performance, compliance and long-term reliability.

Our core equipment includes: