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How does Metal Fabrication select the materials?
The selection of materials in Metal Fabrication is a crucial decision in every custom project—choosing the right material ensures the smooth progress of the project and keeps costs under control; choosing the wrong one not only increases the difficulty of fabrication but may also lead to project failure.
This article compares common metal materials, including carbon steel, stainless steel, and aluminum. It provides you with a clear set of selection methods. If you are still unsure after reading, our engineering team can offer you free one-on-one material recommendations.
Common Metal Materials and Their Fabrication Characteristics
The performance of different metal materials varies significantly in fabrication processes such as cutting, bending, stamping, welding, and surface treatment. The following summarizes the results from two aspects: Fabricability and relative cost.
Carbon Steel
Relative cost ★☆☆☆☆
Stainless Steel
Relative cost★★★★☆
Corrosion-resistant, high-temperature-resistant, with a shiny appearance. Laser cutting requires higher power. The Deep Stamping molds wear out quickly. Heat control for welding to prevent deformation. Almost no surface treatment is needed after completion.
Aluminum & Alloys
Relative cost ★★☆☆☆
Lightweight, fast heat conduction, easy cutting. Laser cutting has high reflectivity (requires anti-reflection modules); pay attention to rebound during bending and stamping. For welding, use AC TIG or MIG.
Copper / Brass
Relative cost ★★★★★
Excellent conductivity and heat conductivity, demanding for laser cutting equipment, prone to producing burrs during stamping. Generally used for electrical or decorative purposes.
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How to Select Materials Based on Fabricability and Cost?
The following three steps constitute the scientific framework of “Selection of Metal Fabrication Materials”. Please analyze them step by step in accordance with the actual situation of your project.
Step 1 · Clearly define the usage environment and functional requirements
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Is corrosion resistance required?
→ Yes: Stainless steel (or carbon steel + heavy coating)
→ No: Carbon steel or aluminum
Is lightweighting required?
→ Yes: Aluminum (higher specific strength)
→ No: Carbon steel (lowest cost)
Is electrical conductivity or heat conductivity required?
→ Copper or aluminum should be given priority.
Are there any appearance requirements (such as shine, brushed finish)?
→ Stainless steel or aluminum + anodizing
Step 2 · Evaluate the main fabrication process
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- Stamping/Deep Stamping , low-carbon steel or aluminum is preferred.
- CNC machines prefer to use materials with good machinability, such as malleable steel, aluminum, or brass.
- Components requiring welding: Carbon steel is the easiest; aluminum requires specific techniques; and stainless steel requires careful control of the heating input.
Step 3 · Calculate the total cost
▶
Don’t just look at the price per kilogram of the materials; you need to calculate the total cost. For example:
Case B: Carbon steel (cheap) but requires galvanizing or powder coating, which increases processing steps and the risk of defects.
The above steps have enabled you to complete a basic material analysis.If you still have any questions, please feel free to contact us – we will provide you with free advice.
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Don’t Know What to Choose?
——Our engineers will provide you with free material suggestions.
If you still have doubts regarding the following issues:
– Should my part be made of carbon steel or stainless steel? What is the difference in cost? How many levels of corrosion resistance are there?
– Which material is the most suitable for Deep Stamping without cracking or excessive springback?
– How can I reduce the total Fabrication cost without sacrificing key performance?
– Do I need a part that is both strong and lightweight? Is aluminum sufficient? Should high-strength steel be used?
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