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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

Eastern Steel Manufacturing Co.,Ltd is a leading manufacturer and distributor of seamless steel pipe, welded steel pipe, OCTG products and fittings. We supply first-step processing, semi-finished parts and finished parts to help our clients meet fabrication requirements beyond their capacity or to improve operations by moving forward the pre-production processing. Email: sales@eastern-steels.com

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Nanuet, New York

Welcome to EITC EITC is a special inspection agency providing inspection services for structural steel, which includes welding, high strength bolting and non-destructive testing of welds. EITC is nationally certified by the: New York & […]

+1 862-220-0788Website
Franksville, Wisconsin

Non-Destructive Testing services include material testing, mechanical integrity, concrete testing, structural steel bridge and building inspection & testing, aircraft ndt inspection, welder qualification & weld inspection, aerial equipment inspection, and ndt laboratory testing.

+1 262-878-8700Website
Capitol Heights, Maryland

POTOWMAC ENGINEERS WAS ESTABLISHED IN 1984, TO PROVIDE SERVICES IN CONSTRUCTION INSPECTION, GEOTECHNICAL ENGINEERING, TESTING AND CONSTRUCTION MANAGEMENT. POTOWMAC ENGINEERS IS A SMALL & MINORITY BUSINESS ENTERPRISE. OVER 30 YEARS EXPERIENCE IN CONSTRUCTION QC/QA AND CONSTRUCTION MANAGEMENT, GEOTECHNICAL ENGINEERING RELATED TO PROJECTS SUCH AS COMMERCIAL HIGH-RISE BUILDINGS, HIGHWAYS, STEAM DISTRIBUTION SYSTEMS, PARKING LOT PAVING, STEEL FRAMED OFFICE BUILDINGS, EDUCATIONAL FACILITIES, CORRECTIONAL INSTITUT

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Monroeville, Pennsylvania5.0(15)

Discover Steel City NDT, offering reliable non-destructive testing services for quality assurance in steel and metal industries.

+1 724-212-7322Website
Caledonia, Michigan

T�V Rheinland has a long history of providing materials testing and inspection services to global customers in accordance with numerous domestic and international requirements. As an independent third party, T�V Rheinland's materials testing services provide trusted certification for the safety and integrity of parts and products. Testing and inspection are available for concrete and steel structures to ensure a structure complies with codes and regulations. Mechanical integrity testing evaluates the condit

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Allentown, Pennsylvania

pipe coupons, plate coupons, weld test coupons, welder test materials, aluminum plate, stainless plate, steel plate, aluminum pipe, stainless pipe, steel pipe

+1 800-223-9884Website

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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