CNC Machining Metal Materials

Comprehensive guide to our machinable metals — from lightweight aluminum to high-performance superalloys. Choose the right material for your application with expert support.

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  • AS9100D
  • ISO 9001
  • ISO 13485
  • 20+
    Metal Alloys
  • ±0.005mm
    Tolerances
  • No MOQ
    Min Order

Precision Metal Machining for Every Application

Metals are the backbone of precision CNC machining. Their combination of strength, thermal conductivity, electrical properties, and formability makes them essential across aerospace, medical, automotive, and industrial sectors.

DEK machines over 20 metal alloys with tolerances as tight as ±0.005mm. Our state-of-the-art 3-, 4-, and 5-axis CNC machining centers handle everything from single prototypes to production runs of 100,000+ parts — all under controlled processes with full documentation and inspection.

  • Certified Quality

    AS9100D, ISO 9001, ISO 13485 certified processes

  • Fast Turnaround

    Prototype lead time from 3 days, quotes in 6 hours

  • Full Documentation

    Material certs, CMM reports, and FAI included

  • Surface Finishing

    Anodizing, plating, polishing, bead blasting & more

20+ Machinable Metal Alloys

From common engineering metals to exotic superalloys, DEK has the material expertise and machining capability to deliver precision parts in any metal family.

Not seeing the material you’re looking for? Have our experts assist you!

Metal Material Comparison

Compare key properties across our most-requested metals to quickly identify the right material for your project requirements.

Material
Strength
Weight
Corrosion Resistance
Machinability
Cost
Common Grades
Aluminum
Very Light
Excellent
Low
6061, 7075, 5052, 2024
Stainless Steel
Heavy
Moderate
Medium
303, 304, 316L, 17-4PH
Titanium
Light
Difficult
High
Grade 2, Grade 5 (Ti-6Al-4V)
Copper
Heavy
Good
Medium
C101, C110, C145
Brass
Heavy
Excellent
Medium
C360, C260, C280
Alloy Steel
Heavy
Moderate
Low
4140, 4340, 8620
Inconel
Heavy
Difficult
Very High
625, 718, X-750
Magnesium
Lightest
Excellent
Medium
AZ31B, AZ91D

Metal Machining Considerations

Key factors our engineers evaluate when selecting the optimal machining strategy for your metal parts.

  • 1

    Material Hardness & Tool Wear

    Harder metals like titanium, Inconel, and tool steels require specialized carbide or ceramic tooling, reduced feed rates, and optimized coolant strategies to maintain tool life and dimensional accuracy.

  • 2

    Thermal Conductivity

    Metals with low thermal conductivity (titanium, stainless steel) concentrate heat at the cutting edge. This demands careful speed control and high-pressure coolant to prevent thermal deformation and tool failure.

  • 3

    Chip Formation & Evacuation

    Ductile metals like copper and aluminum produce long, stringy chips that can wrap around tooling. Chip-breaking strategies, proper flute geometry, and air blast systems ensure clean, consistent cuts.

  • 4

    Surface Finish Requirements

    Different metals achieve different finish qualities. Aluminum can reach Ra 0.4μm with standard milling. Stainless steel may require secondary polishing. We match process parameters to your surface spec.

  • 5

    Dimensional Stability

    Internal stresses from heat treatment or cold working can cause warpage during machining. Stress-relief annealing, strategic roughing passes, and multi-setup sequencing ensure parts hold tolerance.

  • 6

    Post-Machining Treatments

    Anodizing, black oxide, passivation, plating, bead blasting, and heat treatment. We coordinate secondary processes in-house or through qualified partners to deliver finished, ready-to-use parts.

Where Our Metal Parts Perform

Precision-machined metal components serving the world's most demanding industries — from flight-critical aerospace parts to life-saving medical devices.

  • Aerospace & Defense
    Flight-critical structural components, turbine blades, brackets, and avionics housings machined to AS9100D standards with full traceability.
    Titanium Inconel 7075 Al Stainless
  • Medical Devices
    Surgical instruments, implant components, and diagnostic equipment housings. ISO 13485 certified processes with biocompatible material support.
    316L SS Titanium Cobalt-Cr
  • Robotics & Automation
    End effectors, actuator housings, precision gears, and structural chassis components with tight tolerances for reliable automated operation.
    6061 Al 4140 Steel Brass
  • Semiconductor
    Ultra-clean chamber components, wafer handling parts, and gas delivery system fittings with sub-micron surface finishes and contamination-free processing.
    6061 Al Hastelloy Kovar
  • Industrial Equipment
    Heavy-duty housings, shafts, hydraulic manifolds, and wear-resistant components for industrial machinery and power generation systems.
    4340 Steel Cast Iron Bronze
  • Energy & Power
    Turbine components, valve bodies, heat exchanger parts, and specialized fittings for oil & gas, nuclear, and renewable energy sectors.ments.
    Inconel Monel Stellite