Ensuring the quality of aluminum profiles is essential for delivering reliable, high-performance door, window, and facade systems. Below are the core inspection standards used in modern production and quality control.

1. Chemical Composition Inspection
Verifies the alloy meets national or international standards (such as 6063, 6061, 6005).
• Ensures strength, corrosion resistance, and extrusion stability.
2. Mechanical Properties
Profiles must pass tests for:
• Tensile strength
• Yield strength
• Elongation
These indicators confirm material durability and load-bearing performance.
3. Dimensional Accuracy & Tolerances
Precise measurements ensure smooth assembly and compatibility.
• Wall thickness
• Width & height
• Flatness, straightness, twist
Compliant profiles reduce fabrication problems and project delays.
4. Surface Quality Inspection
Checks for visible defects such as:
• Scratches, dents, bubbles
• Stains or color difference
• Coating uniformity
A consistent surface finish is critical for architectural applications.
5. Coating & Finishing Tests
Different finishes require specific performance tests:
• Anodizing: film thickness, sealing quality
• Powder coating: adhesion, hardness, impact resistance
• PVDF: color stability, UV resistance
These tests ensure long-term durability in various climates.
6. Thermal Break Quality (if applicable)
For insulated profiles:
• PA66 strip quality
• Shear strength
• Bonding quality
This guarantees reliable thermal insulation performance.
7. Loading & Performance Tests
Depending on the end system design:
• Corner strength
• Profile hardness
• Compatibility with hardware & accessories
Consistent Quality for Global Markets
High-quality inspection standards help ensure aluminum profiles perform reliably in residential, commercial, and large-scale architectural projects worldwide.
At Shandong Kangdi Aluminum, every batch of profiles undergoes strict testing—from raw material to final surface treatment—ensuring stable quality and compliance with international standards.
If you need catalogs, samples, or technical specifications, feel free to reach out.