4 ways to simply check the quality of your aluminum parts

Are you worried about the quality issues that would possibly bring you much loss in the new project? Or wondering how the new-launched aluminum parts will perform in its application with another component? Waste no time here as here you will see ways of checking quality for your parts, which will help you build up SOP ( Standard Operation Procedure) with your supplier, also bring you much convenience to decide which supplier should you work together in the long run.

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Are you worried about the quality issues that would possibly bring you much loss in the new project? Or wondering how the new-launched aluminum parts will perform in its application with another component? Waste no time here as here you will see ways of checking quality for your parts, which will help you build up SOP ( Standard Operation Procedure) with your supplier, also bring you much convenience to decide which supplier should you work together in the long run.

Alloy : request the composition certificate

The composition certificate is the test results of the aluminum parts. It tells clearly the composition of which alloy that you required, the state of alloy, tensile strength, yield strength, as well as the hardness of the alloy.

The certificate has scaled values of each metal in the specific alloy and will show the measured results from the latest goods. It keeps updated regularly to show that the supplier has stable control for each batch of the orders.

6063 alloy – composition certificate

Dimension: Request dimensional report

Dimensional reports could help you clearly understand the final results of each dimension marked on the drawing. You can tell if the goods are qualified or not from it. In addition, the dimensional report will also facilitate how to trace the problems during the machining and manufacturing of the aluminum parts. A reliable supplier will follow strictly the processing procedure of the parts and he will keep everything under control. Thus requiring the dimensional report also will help the supplier to improve the quality checking. Both of you will benefit from it in the long run.

Gauges will be used to check the dimension, like the dimension of linear and angle.

Workers are checking the dimension of the opening.

Aluminum Finish:

Check the color

The first step is to check the color to see if it is the same as your request for the parts. There might be color differences, but never mind as there is not 100% the same color from two different factories. You can ask to improve the color as you are satisfied with it.

QC is checking the color difference.

Check the finish effect

A good finish for the aluminum parts should be no peeling, bubble, dark line, particles. No matter you are choosing the anodizing or the powder coating, follow this standard to check the results.

Powder coating of aluminum extrusion.

Check the thickness of coating

For anodizing parts, the thickness of the coating varies a lot and the cost for each of the results would be very different. You can get simply 5-8 um thickness, while you can also do hard anodizing for your parts which is with the thickness from 25-70 um. The supplier will have professional thickness inspection equipment (shown below), you can ask for the test results.

Regarding the thickness of the powder coating, the standard is 40-100 um.

Anodizing thickness test result: parts with 35um thickness in black color.

Assembling results: to see how the parts perform

Aluminum parts will be assembled or jointed with other accessories or components, thus it is important to make sure that all parts would match up with other related accessories. Before you go to the mass production, remember to send the accessories or components to your supplier so that they could set up the routine to check regularly the assembly of the parts during the production.

The 4 simple ways of checking the quality of your parts are the experiences from our daily work and you can build up the SOP based on it to check the quality in the future. If you are seeking a method of improving the quality, welcome to contact us through the contact page

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Koma Su
Koma Su
Hi, I’m Koma Su, the founder of Aluphant. I’ve been engaging in the business of supplying CNC-machined aluminum extrusion for 6 years now, and the purpose of this article is to share with you the knowledge related to aluminum extrusion from a Chinese supplier’s perspective.
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