2025-03-03 08:25:05
Aluminum sheet as a modern industrial “universal material”, in the building decoration, transportation, electronics and electrical appliances and other fields are widely used. But the quality of aluminum on the market varies, how to accurately identify the advantages and disadvantages of the procurement key. In this paper, from raw materials to the production process, for you to systematically analyze the quality of aluminum 5 core indicators, to help you easily identify the quality of aluminum sheet.
1. Material composition test: high-quality aluminum sheet will be clearly marked 1060, 3003, 5052 and other alloy grades. For example: 1 series (pure aluminum): good conductivity, suitable for the power industry, 3 series (aluminum-manganese alloy): strong rust resistance, mostly used in kitchenware, 5 series (aluminum-magnesium alloy): high strength, suitable for shipbuilding. Aluminum plate composition check can also be detected by spectral analyzer for elemental content. Special attention: magnesium content deviation should be ≤ 0.1%, the total amount of impurity elements should be <0.15%.
2. Production process evaluation: hot rolling process compared to cold rolling process surface roughness strength is also lower, but its production cost is low and is suitable for more than 6mm thickness, cold rolling process has the advantage of high strength with smoothness, but only for 0.15-6mm thickness and high production cost. Users can choose according to their own needs. Can be purchased for the annealing process to verify the aluminum plate, the specific method is to use a fingernail to scratch the surface of the aluminum plate without scratches is a high-quality annealed plate, on the contrary, that is, poor-quality products!
3. Surface quality testing: surface quality inspection is divided into two steps, the common surface defects check: bubbles: diameter > 0.3mm is unqualified scratches: longitudinal scratches depth should be ≤ 5μm, color difference: in the D65 standard light source color difference ΔE should be ≤ 1.5. oxidized film test: with an alkaline solution (PH = 10) drops on the surface: qualified oxidized film: no corrosion in 5 minutes, poor quality oxidized film: immediately appear white spot!
4. Physical properties of simple test methods: bending test: take the sample in the diameter = plate thickness × 2 round bar bending 180 °, no cracks for qualified, hardness test: measured with a hardness tester, the HV value error should be <5.
5. Three look principle: first look at the certificate, and then look at the edges: high-quality aluminum plate cut straight and no burrs, and finally look at the packaging: regular products have a complete protective film and logo.
Through the 5 quality indicators in this article, I believe you have mastered the core points of aluminum quality determination. It is recommended to combine their own situation to choose. Check this article at any time to understand the aluminum quality judgment guide, so that the poor quality of aluminum sheet has nothing to hide!
