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Steel CNC Machining Shops — Carbon & Alloy Steel Parts

Carbon and alloy steels are workhorses of the machining world, offering a broad range of hardness, toughness, and cost options. CNC shops machine steel grades such as 1018, 4140, and 4340 for shafts, gears, tooling, and heavy structural parts where strength is paramount.

Typical Uses

  • Shafts and gears
  • Tooling and fixtures
  • Structural machine components
  • Agricultural and construction equipment parts
Columbia, South Carolina5.0(8)

Thanks for visiting the website of Service Machine LLC. We are a full service machine shop specializing in conventional and CNC machining, steel fabrication, and hydraulic cylinder repair.

+1 803-779-4949Website
Lake Zurich, Illinois

9100 (9001:2015) certified. Certification body: DQS Inc.. Structure: Single Site.

+1 (847) 719-5900Website
Tucson, Arizona

5-axis CNC machining for aerospace and defense. AS9100 certified, ITAR registered. Aluminum, titanium, and steel.

(520) 294-5768
Coatesville, Pennsylvania5.0(1)

Stainless Plate Products is a USA producer of plasma cut, water jet cut, machine cut quality stainless steel rings, discs, plate flanges and custom cut plate.

+1 800-523-7532Website
Coatesville, Pennsylvania

Stainless Processing, Inc develops the highest quality stainless steel rings, discs, standard and specialty plate flanges as well as completely custom cut and machined products for specialty applications.

+1 800-345-8126Website
Belleville, Michigan5.0(2)

We provide heavy steel plate fabricating, large CNC machining, and precision plate burning. Located in Michigan, Ideal Fabricators and Statewide Boring proudly serves all of North America.

+1 734-397-5950Website
Canfield, Ohio

At Steel Valley Machining, we offer a wide range of machining services, including 3 axis CNC milling, 2 and 3 axis CNC turning, design/reverse engineering,

+1 330-717-9546Website
Pawcatuck, Connecticut4.7(15)

Thavenet Machine Company is a family owned and operated company founded in 1921 by the late John Thavenet. This fourth generation company is proud to serve the local area in machining, welding and design. In addition to the services noted it is also the hometown supplier of steel, welding supplies and industrial gases. Stop by our Pawcatuck, Connecticut shop and let us know what we can do to serve you.

+1 860-599-4495Website
Stafford, Virginia4.5(51)

We are an automotive machine shop and restoration shop in the stafford and northern virginia area.Aluminum,steel and cast iron repair.

+1 540-659-3797Website
Tri-Star CNCVerified
Santa Fe Springs, California

5-axis CNC machining for aerospace and defense. Titanium, Inconel, and hardened steel specialists. AS9100D certified.

(562) 404-1032
Vidor, Texas

The trusted name in structural, mechanical & civil steel fabrication. Experience, automation, & technology with a world class and safe environment.

+1 409-786-1783Website
North Haven, Connecticut

9100 (9001:2015) certified. Certification body: TUV SUD America Inc.. Structure: Multi-Site.

Website
Sutton, Massachusetts5.0(1)

United Machining is a Swiss Turning/Milling CNC Machine Shop Serving Industrial Customers as Well as Creating OEM Products. Buy Stainless Steel Herb Grinders and more.

+1 508-865-3035Website

Frequently Asked Questions

What materials do CNC shops use for steel machining?
Carbon and alloy steels are workhorses of the machining world, offering a broad range of hardness, toughness, and cost options. CNC shops machine steel grades such as 1018, 4140, and 4340 for shafts, gears, tooling, and heavy structural parts where strength is paramount. Typical applications include: Shafts and gears, Tooling and fixtures, Structural machine components, Agricultural and construction equipment parts.
How do I choose a CNC shop for steel parts?
Look for shops with documented experience machining steel, relevant certifications (ISO 9001, AS9100 for aerospace), and in-house inspection capability. Request sample or first-article inspection reports before committing to production volumes.
What tolerances can CNC shops hold on steel parts?
Most precision CNC shops can hold ±0.001″ (±0.025 mm) tolerances on steel parts as standard. Tighter tolerances down to ±0.0002″ are achievable with specialized equipment and process controls. Confirm tolerance requirements upfront in your RFQ.

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