Magnesium CNC Machining Service
Advanced magnesium CNC machining services for reliable solutions for your manufacturing needs. Get instant quotes, fast lead times, and competitive pricing.
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Magnesium
Extremely lightweight (67% aluminum density), good vibration damping, requires surface treatment.
Price:
$0
Lead Time:
< 10 days
Wall Thickness:
0.75 mm
Tolerances:
±0.005″ (±0.125mm)
Max Part Size:
200 cm x 80 cm x 100 cm
‌Magnesium Alloy AZ31B
A wrought magnesium alloy containing 3% aluminum and 1% zinc, offering excellent strength-to-weight ratio and moderate corrosion resistance. ‌Suitable Processes‌: Hot rolling, extrusion, forging, welding (TIG). ‌Applications‌: Aerospace components, automotive body panels, laptop casings, and bicycle frames.
Tensile Strength, Yield (MPa) Fatigue Strength (MPa) Elongation at Break (%) VHardness (Brinell) Density (g/cm³)
180 - 240 100 6-20 50-70 1.77
‌Magnesium Alloy AZ91D
A die-cast magnesium alloy with 9% aluminum and 1% zinc, known for high fluidity and superior corrosion resistance among Mg alloys. ‌Suitable Processes‌: Die casting, injection molding, surface treatment (chromate conversion). ‌Applications‌: Automotive transmission cases, electronic housings, power tool bodies, and camera components.
Tensile Strength, Yield (MPa) Fatigue Strength (MPa) Elongation at Break (%) VHardness (Brinell) Density (g/cm³)
150-160 90 3-7 60-70 1.81
Surface Finishing Options for Brass
Brass CNC turned parts can undergo various surface finishing processes to enhance their appearance, durability, and performance.
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As Machined
Anodizing
Alodine
Heat Treatment
Teflon Coating
Tumbling
Surface Finishes We Offer
Since magnesium parts are prone to machining defects and formation of burrs, it’s important to treat them with the right surface finishes.
This will improve their aesthetic appeal and enhance performance and longevity. At RapidDirect, we offer an extensive range of surface finishing options tailored to your requirements,
ensuring optimal protection and visual quality for your magnesium parts.
As Machined
Description: Standard finish with surface roughness of 3.2 μm (126 μin), removes sharp edges and deburrs parts cleanly. Key Use: Functional parts requiring no post-processing (e.g., brackets, gears). Process Tolerance: Dimensional ±0.1 mm, Ra 3.2±0.5 μm Process Specifications: ISO 2768-m standard, burr height ≤0.05 mm
Anodizing
Description: Electrochemical oxide layer for corrosion resistance and aesthetics. Process Compatibility: Post-machining surface treatment Key Use: Aerospace components, consumer electronics (e.g., phone frames). Process Tolerance: Coating thickness 10-25 μm±2 μm, color consistency ΔE≤1.5 Process Specifications: MIL-A-8625 or ISO 7599, sealing pH 5.5-6.5
Alodine
Description: Chemical film for corrosion protection and paint adhesion. Process Compatibility: Post-cleaning chemical immersion Key Use: Aviation and automotive electrical housings. Process Tolerance: Film thickness 0.5-3 μm, visual uniformity Process Specifications: Immersion time 3-10 min, bath temp. 20-30℃
Heat Treatment
Description: Thermal process to alter material hardness/toughness. Process Compatibility: Post-machining quenching/tempering Key Use: Gears, cutting tools. Process Tolerance: Hardness HRC 45-60±2, distortion ≤0.1% Process Specifications: Quench temp. 800-1000℃, temper time 1-4 hrs
Teflon Coating
Description: Non-stick, chemical-resistant polymer layer. Process Compatibility: Spraying/baking Materials: Metals, ceramics Key Use: Cookware, chemical valves. Process Tolerance: Coating thickness 15-50 μm±5%, non-stick cycles ≥1000 Process Specifications: Sintering 360-400℃, cure time 10-30 min
Tumbling
Description: Barrel polishing for edge rounding and deburring. Process Compatibility: Vibratory/rotary barrels Materials: Metals, plastics Key Use: Jewelry, small hardware components. Process Tolerance: Edge radius R0.1-0.5 mm, weight loss ≤1% Process Specifications: Media size 3-10 mm, speed 10-30 rpm, time 1-12 hrs
Pros
Lightweight: Magnesium is one of the lightest structural metals, making it ideal for applications where weight reduction is crucial.
High Machinability: Magnesium’s superior machinability makes it easier to cut and shape using CNC machining processes. The material’s lower cutting forces help reduce the rate of tool wear, enhancing overall machining efficiency.
Complex Geometries: Magnesium alloys are ideal for producing custom parts with complex geometries due to their high machinability. Multi-axis CNC machines can machine magnesium alloys from various angles, ensuring high accuracy and adherence to specifications.
Good Damping Properties: Effective at absorbing vibrations, which is beneficial in automotive and aerospace applications.
Recyclable: Magnesium alloys are environmentally friendly and recyclable, making them ideal for sustainable manufacturing. CNC machining magnesium generates waste that can be recycled, contributing to eco-friendly production practices.
Cons
Flammability: Machining magnesium alloys generates fine chips and dust that are highly flammable, posing a significant fire risk. Fires can ignite due to excessive heat or sparks produced during the machining process.
Heat Generation: Magnesium’s poor heat conductivity causes high heat concentration in the cutting zone, leading to elevated cutting temperatures. This can reduce tool life, cause workpiece deformation, and increase tool wear.
Tool Wear: Magnesium’s relatively soft and abrasive nature accelerates tool wear compared to other metals. This results in decreased machining efficiency and increased tool replacement costs.
Surface Deformation: Magnesium alloys are prone to burr formation and machining-induced deformation. Thus, achieving high-quality surface finishes without appropriate machining strategies and tooling selection is challenging.
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