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CNC Machining Material

Carbon Steel

The reliable choice balancing strength and cost

Quick Stats

Machinability
Excellent
Tolerance
±0.01 mm
Lead Time
5-7 days
Min Wall
0.5 mm
Company
Strength
20 Years of Experience
20 Years of Experience
72 Sets of CNC Machines
72 Sets of CNC Machines
Precision: ±0.01mm
Precision: ±0.01mm
7-15 Days Fast Shipping
7-15 Days Fast Shipping
Quality
Advantages
No Knife Marks
No Knife Marks
No Scratches
No Scratches
No Blemishes
No Blemishes
No Color Difference
No Color Difference

Material Overview

Carbon steel is a fundamental material in CNC machining, offering excellent strength, toughness, and cost-effectiveness for a wide range of industrial applications. It is the backbone of manufacturing, used in everything from machinery components to structural frames.

We machine various carbon steel grades including 1018 (low carbon, excellent weldability), 1045 (medium carbon, good strength), and A36 (structural grade). Each grade is selected based on the application requirements for strength, hardness, and weldability.

Carbon steel machines well and can be heat-treated to achieve a wide range of mechanical properties. Surface treatments include black oxide, zinc plating, nickel plating, and powder coating for corrosion protection and enhanced appearance.

Key Advantages

  • High strength and toughness
  • Excellent weldability and formability
  • Cost-effective for large production runs
  • Wide range of available grades
  • Can be heat-treated for enhanced properties
  • Multiple surface treatment options

Material Properties

The following table lists typical mechanical, thermal, and physical properties for this material. Actual values may vary by grade and temper.

Property Value Unit

Available Grades & Alloys

We stock multiple grades for different application needs. Each grade offers distinct properties optimised for specific uses — click to view detailed specifications, machining advice and typical applications.

Carbon Steel · Related Products

A selection of parts machined from this material.

Common Applications

This material is widely used across multiple industries for various applications, from precision prototypes to end-use production parts.

Medical

Surgical instruments, housings

Aerospace

Structural brackets, panels

Automotive

Engine components, housings

Electronics

Heat sinks, enclosures

Robotics

Motor mounts, brackets

Industrial

Fixtures, jigs, tooling

Consumer

Frames, handles, cases

Marine

Fittings, valves, hardware

CNC Machining Tips

Available Surface Finishes

Finish Type Description Ra (typical)

Compatible Surface Treatments

Common Applications

Material FAQ

The questions engineers ask most about machining, surface quality and selecting this material.

Related to Carbon Steel

Is UHMW-PE Really More Wear-Resistant Than Steel?+
In low-load, mid-to-high-speed environments with abrasive particle erosion, this is indeed the case. The wear resistance of UHMW-PE can reach approximately 7 times that of carbon steel. It features a low coefficient of friction, non-stick properties, and low operating noise. However, its rigidity and load-bearing capacity are far inferior to steel, classifying it as a wear-resistant but non-load-bearing material. Structural support is required during design to compensate for stiffness.

Read full answer

Can CNC Machining of Acrylic (PMMA) Achieve a Mirror Finish?+
Yes. Acrylic is one of the few plastics that can achieve a mirror finish directly through cutting. We use single-crystal diamond tools for precision machining, followed by flame polishing or diamond grinding. Surface roughness is consistently controlled within Ra0.4μm, delivering a high-gloss appearance free of scratches or defects, resembling a mirror. No secondary coating is required. For batch production, identical parameters are used to ensure consistent mirror finish quality.

Read full answer

PEI vs PEEK: How to Choose?+
Temperature and cost guide selection. PEI offers long-term service up to 170°C (Tg 217°C), inherent flame retardancy, and lower cost than PEEK, ideal for aerospace interiors, electrical insulation, and medical device structural parts. PEEK withstands long-term temperatures up to 250°C with better chemical and wear resistance, suitable for high-heat, corrosive, or implant-grade applications. For temperatures below 170°C, PEI is usually more economical.

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Can Plastic and Aluminum Parts Maintain Consistent Aesthetic Quality?+
The criteria for judgment are consistent: high gloss, high-shine surface, no scratches, and no defects. The difference lies in the process—aluminum parts rely on anodizing and polishing, while plastic parts use diamond cutting and flame polishing or mechanical polishing. When aluminum and plastic parts are mixed in the same batch, we standardize color swatches and gloss samples to avoid visual discrepancies between the two materials on the same product.

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PP vs PE: What Is the Difference & Which Should You Choose?+
PP offers superior rigidity and heat resistance (mp ~160°C) with good chemical resistance and low cost, making it ideal for chemical tanks, flanges, and pump/valve parts. PE is softer, handles extreme cold better (down to -100°C), and has a low friction coefficient; UHMW-PE delivers 7x the wear resistance of carbon steel, suiting conveyor rails and wear liners. Select PP for rigidity/heat and PE for wear/low-temperature performance.

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Can Plastic Parts Achieve a Ra0.4μm Mirror Finish?+
Yes, but not all plastics can achieve this. Dense, polishable materials such as acrylic, PC, POM, and PEEK, when processed with diamond tooling and polishing, can consistently reach surface roughness below Ra0.4μm, achieving a high-gloss, mirror-like appearance. Glass or carbon fiber-filled grades, due to exposed fibers, can only achieve a matte or satin finish, which we will clarify in advance.

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Send Us Your Drawing — We Handle the Rest

Send your STEP / DWG / PDF drawing and get a detailed quote with free DFM analysis and process recommendations within 2 hours. No minimum order — from 1 piece.

Live inquiries
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