Product Parameters

Item	Specification
Coating Thickness	25 μm – 100 μm
Hardness	60–70 HRC (450–600 HV)
Material	Aluminum 6061-T6, 7075-T6, 2024-T3
Color	Type II: Natural, Black; Type III: Natural, Black, Custom
Application	Wear resistance, electrical insulation, aerospace
MOQ	10 pcs

description

Hard anodized aluminum is aluminum with an artificially thickened oxide layer - typically 25 to 100 micrometers thick - that provides hardness, wear resistance, and electrical insulation where standard anodizing would not be sufficient. The hard anodized surface is the second-hardest surface finish available on aluminum, surpassed only by coatings like hard chrome or PVD. Type III hard anodizing (MIL-A-8625 Type III) is the military spec version - controlled thickness, controlled hardness, consistent performance for aerospace and defense applications. The surface is wear-resistant, has low friction coefficient, and provides excellent electrical insulation up to several hundred volts. 6061-T6 is the most common aluminum for hard anodizing - good balance of machinability, strength, and anodizing response. 7075-T6 offers higher strength for aerospace structural components. 2024-T3 handles high-stress applications where fatigue resistance matters.

Hard Anodize Design Rules - What You Need to Know

The hard anodized surface is brittle compared to the aluminum substrate. Sharp corners and high-stress concentrations cause cracking. Design for even stress distribution and minimum 0.5 mm corner radii on anodized features. Also note: hard anodize grows the surface, so critical dimensions must be machined with that growth in mind.

FAQ

Q1: MOQ?

A1: 10 pieces.

Q2: Coating thickness?

A2: 25 μm to 100 μm depending on application requirements.

Q3: Hardness achieved?

A3: 60–70 HRC (450–600 HV) on the anodized surface.

Q4: Materials that work best?

A4: 6061-T6, 7075-T6, 2024-T3 aluminum alloys.

Q5: Color options?

A5: Natural and black standard. Custom colors available for Type II.

Q6: Design limitations?

A6: Minimum 0.5 mm corner radii on anodized features. Growth must be accounted for in machining dimensions.

Quality is non-negotiable in precision manufacturing. Every component undergoes rigorous inspection at each stage of production.

AS/EN/JISQ 9100 - Aerospace quality management for flight-critical and structural parts
NADCAP - Accredited special processes including heat treatment, NDT, and surface treatment
DFARS / ITAR - Compliant supply chain for defense and space applications
Boeing DMS / Airbus SP - Customer-specific requirements documentation available
Passivation / Electropolishing - ASTM A967 procedures for corrosion resistance
Material Traceability - Heat number tracking from raw material to finished part
MIL-A-8625 - Military-specification anodizing for aluminum components
Coating Thickness Testing - Coating weight and thickness verification per MIL spec
Salt Spray Testing - 1000-hour ASTM B117 corrosion resistance verification available

From raw material to finished product, every step is controlled and documented:

Material Preparation - CNC turning/milling to near-net shape
Heat Treatment - Through-hardening or case-hardening for strength-critical parts
Surface Preparation - Degreasing, acid cleaning, and surface activation
Electroplating - Controlled bath process with thickness monitoring
Sealing / Baking - Chrome sealing, anodize sealing, or hydrogen embrittlement relief baking
Inspection - Coating thickness measurement, adhesion testing, and visual check
Packaging - Protective interleaving, VCI packaging, and anti-tarnish wrapping

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