Materials for custom metal parts
Process and material guides
Material choice shapes both the stamped part and the die that makes it. WenXinDa helps OEM teams specify sheet and coil for brackets, clips, and contacts, and define tooling materials around wear, heat treatment, and trial requirements. Fabricated and CNC components are reviewed as supporting work.
01 Start with the form
Match the material to the manufacturing process
For stamping, start with sheet or coil grade, thickness, temper, surface condition, and grain direction. For the die, identify the working components and their hardness or wear requirements. These are separate material decisions: the best stock for a finished part is not the same as the steel used in a punch or die insert.
Material for stamped parts
Sheet and coil grade, thickness, and temper influence forming, springback, burr condition, and repeat-part consistency.
Explore the processMaterial for stamping dies
Punches, die inserts, wear plates, and supporting tool components need a defined steel grade, working condition, and replacement scope.
Explore the processSupporting components
Fabricated or CNC parts may use sheet, plate, or bar. Specify their own material and finish rather than applying the stamping-stock specification to every item.
Explore the process02 Material specification
Sheet, coil, and tool steel: specify each for its purpose
Part materials are selected for function and formability; tool materials are selected for the demands of cutting and forming them. Grade, thickness, temper, surface condition, and any required traceability belong in the enquiry. Tool steel and heat treatment are reviewed with the die concept.
| Material family | Example designations | Typical fit and selection detail |
|---|---|---|
| Steel sheet & coil | Cold-rolled steel · galvanized steel · spring steel | Brackets, plates, clips, and formed hardware. State the exact standard, grade, thickness, and condition; coatings and spring behavior need separate review. |
| Stainless sheet | 304 · 316L · 430, where specified | Corrosion-resistant formed parts and exposed hardware. Grade, temper, work hardening, and appearance affect forming and die review. |
| Copper & copper alloys | Copper · brass · phosphor bronze | Contacts, terminals, shields, and spring-related components. Specify alloy, temper, conductivity or spring requirements, and plating areas. |
| Aluminum sheet | 5052 and other drawing-specified alloys | Lightweight brackets, covers, and formed components. Select the alloy and temper around bending, springback, finish, and service conditions. |
| Stamping tool steels | Drawing-specified punch, insert, and wear-component grades | Die components require a material and working-hardness plan tied to the stamped material, feature geometry, heat treatment, and agreed maintenance scope. |
03 Substitutions
Compare alternatives without losing the design intent
A different sheet grade, temper, or coating can change springback, forming load, burr behavior, and tool wear. Compare substitutions against the drawing and trial results, including their effect on plating, corrosion performance, and inspection. Obtain written approval before changing the production material.
- Start with the specified alloy, temper, and stock form.
- Keep required strength, corrosion resistance, and customer standards in view.
- Compare the complete route, including secondary operations and finishing.
- Record the selected material in the production specification.
04 Selection criteria
Choose for the conditions the part will face
An indoor control panel, an outdoor mounting bracket, and an electrical contact have different priorities. Describing the operating environment helps us focus the material discussion on the properties that affect performance, instead of selecting a metal by habit.
| Design priority | What to describe | Manufacturing implication |
|---|---|---|
| Strength & stiffness | Loads, direction, duty cycle, deflection limit, and operating temperature. | Alloy and condition may change stock availability, cutting forces, bendability, and heat-treatment sequence. |
| Corrosion exposure | Indoor or outdoor use, chemicals, washdown, salt exposure, and expected service life. | Base material, surface treatment, drainage details, and packaging should be reviewed together. |
| Conductivity | Electrical contact, grounding, thermal transfer, or isolation needs. | Material choice and coating can alter contact resistance or thermal performance at interfaces. |
| Weight & cost | Maximum mass, target cost, and whether part count or assembly time can change. | A lower-cost grade may need more machining or a protective finish; compare total finished-part cost. |
| Appearance | Visible faces, texture, color match, and handling marks that will be accepted. | The stock surface, forming direction, finish process, and packaging all affect the delivered appearance. |
| Regulated inputs | Customer material standard, restricted substances, documentation, and traceability. | The specified source and required records must be identified before material is procured. |
05 Stock and process
Sheet and coil condition affect the whole stamping route
Consistent sheet or coil thickness helps the die produce repeat geometry. Coil width, surface condition, temper, and grain direction can affect feed layout, material yield, springback, and the working surface. For a supplied die, state whether trials must use material from the intended production source.
| Route | Typical starting form | Production considerations |
|---|---|---|
| Metal stamping | Sheet or coil with controlled thickness and temper. | Tooling economics, springback, burr direction, and control of material thickness and condition. |
| Stamping tooling | Tool steel and supporting materials specified for each die component. | Working hardness, heat treatment, dimensional stability, wear points, and the agreed spare-component package. |
| Sheet metal fabrication | Sheet or plate supplied to an agreed thickness and condition. | Bendability, grain direction, flatness, surface quality, and the effect of welding or installed hardware. |
Send the material designation exactly as it appears on your drawing. If it is still open, tell us the part function and priorities so we can compare suitable options with you.
06 Grade trade-offs
A practical starting point for material selection
Start with the material family, then compare grades against the geometry and service conditions. Small changes in stock form or temper can make a large difference to the production route.
Aluminum
For stamped or bent aluminum parts, compare formability, bend radius, springback, and finish. State the alloy and temper explicitly; a grade selected for machining may not suit the intended forming route.
Stainless steel
Stainless sheet can suit exposed hardware and corrosion-sensitive components. Match the grade to the service environment, then review temper, work hardening, forming direction, and handling of visible faces.
Carbon & alloy steel
For stamped steel parts, compare strength and spring requirements with bendability, edge condition, and corrosion protection. For die components, review tool steel, working hardness, heat-treatment movement, and replacement needs separately.
07 Prepare the RFQ
Connect material choice to the finished part
Bring the drawing, operating conditions, and quantity into one conversation. We can then review material, manufacturing, finish, and inspection as a complete part—helping purchasing and engineering compare the same scope.
- 01
Define the material
Full grade, standard, sheet or coil thickness, temper, surface condition, and permitted alternatives.
- 02
Define the geometry
Released drawing, CAD, units, critical features, and the intended assembly context.
- 03
Define acceptance
Finish, inspection, material certificate, and traceability requirements.
- 04
Define the order
Release quantity, repeat demand, trial-material source, destination, and required delivery timing.
Material choices in the real part
Choose the metal that works in the assembly and in the die.
The cheapest sheet is rarely the whole cost story. Formability, thickness consistency, spring behavior, surface treatment, and the way the part is packed all influence the finished component.
Mounting bracket: strength, bend, and finish
Start with the load and mounting interfaces, then review the grade and thickness against the formed geometry. A change in strength or temper can change springback and the tooling approach. Include the corrosion environment and final coating in the comparison, especially where a coated face becomes a datum or mating surface.
Retaining clip: material condition matters
For a working clip, the alloy name alone does not describe the behavior. State temper, thickness, direction of working deflection, and any heat treatment. Review production-intent material with the sample plan so the clip is evaluated in the condition that will be delivered.
Electrical contact: define the working surface
Describe the contact function, current-carrying or spring requirement, and the specified alloy and plating. Keep contact surfaces, edge condition, and any permitted handling marks distinct from general cosmetic criteria. Include the material and plating records your approval process requires.
Die insert: select for the cutting task
The stamped material, thickness, edge features, and intended maintenance approach guide the working components of the tool. Identify which grades and working hardness need approval, how replacement inserts will be referenced, and which material or treatment records belong in the handover package.
If a material alternative is worth comparing, ask for its full designation and the effect on forming, finish, inspection, and trial approval. Keep each option visible in the quotation. Your team can then make the selection against performance and total finished-part cost.
Next step
Find a material route that works for your part
Send your drawing and intended use. We will help connect the material choice with the geometry, finish, and production quantity.