Answer Summary: Metal stamping materials determine part strength, corrosion resistance, formability, surface finish, and production cost. The most common materials include stainless steel, carbon steel, galvanized steel, aluminum, copper, and brass. OEM buyers should select materials based on application requirements, the stamping process involved, production volume, and required performance — not on raw material price alone.
What Are Metal Stamping Materials?
Metal stamping materials are the metals — supplied as coil or sheet — that get punched, bent, or formed into a finished part inside a stamping die. If you’re new to the broader metal stamping concept, that guide covers the process itself; this one focuses specifically on material selection. The material isn’t just a raw input; it directly shapes what the die can do, what tolerances are achievable, and how the part performs in its final application.
Different materials behave differently under the press. A material’s thickness, hardness, and ductility determine how tight a bend radius it can handle, how much it will spring back after forming, and how much force the press needs to shape it — which is why material selection happens before die design, not after. See our full metal stamping process guide for how this fits into the complete production sequence, from drawing review through mass production.
Why Material Selection Is Important for OEM Metal Stamping Parts
Choosing the wrong material shows up as a production problem, not a paperwork problem. Common consequences include:
Cracking — when a material’s ductility limit is exceeded during forming
Deformation — when strength or thickness doesn’t match the application’s load requirements
Higher tooling cost — harder materials wear dies faster, requiring more maintenance or rework
Poor surface quality — some materials don’t take plating or coating evenly
Getting material selection right the first time avoids re-tooling, wasted samples, and delayed production — all more expensive than the material cost difference itself.
Common Types of Materials Used in Metal Stamping
| Material | Properties | Applications |
|---|---|---|
| Stainless Steel (SUS304/316) | Corrosion resistance, hygiene | Outdoor hardware, food/medical |
| Carbon Steel / Iron (Q235, SPHC, SPCC) | Cost-effective, easy to form | Brackets, industrial parts |
| Galvanized Steel (SGCC+Z) / ZAM | Weather and corrosion resistance | Solar mounting, outdoor hardware |
| Aluminum | Lightweight, corrosion resistance | Electronics, automotive |
| Copper / Brass | Electrical conductivity | Terminals, connectors, contacts |
| Spring Steel | High yield strength, elasticity | Clips, retainers, spring contacts |
How to Choose the Right Material for Metal Stamping Parts
Step 1 — Define application environment Indoor, outdoor, corrosive, or high-temperature? This narrows the material family immediately.
Step 2 — Check strength requirements Structural load vs. light-duty bracket — different tensile and yield strength needs.
Step 3 — Evaluate formability Deep draws, tight bend radii, or multiple forming stations all demand different ductility.
Step 4 — Consider surface treatment Some materials take plating well; others (like stainless steel) may not need coating at all.
Step 5 — Balance cost and volume At high volume, a slightly more expensive material with better formability can lower total cost by reducing scrap and tooling wear.
Stainless Steel Materials for Precision Metal Stamping
Stainless steel is common in metal stamping for its corrosion resistance and clean surface finish:
SUS301 — higher strength, used where spring properties matter
SUS304 — the most common grade, balancing corrosion resistance and formability
SUS316 — better corrosion resistance for harsher environments (marine, chemical exposure)
From the factory floor — 304 deep drawing experience: Stainless steel parts often require a balance between corrosion resistance and formability. SUS304 is widely used because it provides good corrosion resistance and stable stamping performance. However, for deeper forming applications, material condition and thickness must be carefully evaluated — stainless steel becomes harder during cold forming (work hardening), which reduces ductility. We’ve handled deep drawing projects using 304 stainless steel mesh material where the part required proper annealing treatment between forming stages to restore ductility; without annealing, the hardened stainless steel can crack during further drawing.
One practical risk buyers should know about: 200-series stainless (such as 201) is sometimes substituted for 304 to cut cost, since it looks identical but performs differently under corrosion and forming stress. See our grade verification guide for how to check this before it becomes a finished-part problem.
Cold Rolled Steel (SPCC) for High Volume Metal Stamping
Cold rolled steel (SPCC) — along with basic mild steel grades like Q235 and hot-rolled SPHC — is the workhorse material for high-volume OEM brackets and structural parts, thanks to:
Cost — the most economical option for most non-corrosive applications
Formability — predictable bending and forming behavior
Weldability — compatible with common welding processes for secondary assembly
Coating compatibility — takes zinc plating, painting, and powder coating well
For high-volume automotive and industrial bracket production, SPCC is frequently run through progressive die stamping, where tooling cost amortizes across a large unit count.
Galvanized Steel (SGCC) and ZAM for Corrosion-Resistant Applications
For parts exposed to weather, galvanized and zinc-alloy coated steels add corrosion protection without switching to stainless:
Hot-dip galvanized steel (SGCC+Z) — with specific coating weights such as Z80 or Z120, chosen based on how much corrosion protection the application needs
Zinc-Aluminum-Magnesium coated steel (ZAM) — offers enhanced corrosion resistance beyond standard galvanizing, useful in coastal or high-humidity environments
These materials are common in solar mounting brackets, outdoor hardware, and construction-adjacent parts, where corrosion resistance matters but full stainless steel isn’t cost-justified.
Aluminum Alloys Used in Metal Stamping
Common aluminum grades in stamping include A1050, A3003, and A5052, chosen for:
Weight reduction — significantly lighter than steel for the same part volume
Thermal conductivity — useful for heat sink and enclosure applications
Corrosion resistance — a naturally forming oxide layer protects the surface
For electronic and lighting products specifically, anodizing is a common finish choice — both natural (clear) anodize and black anodize are available, changing appearance while adding a harder, more corrosion-resistant surface layer. Material specifications for aluminum may reference standards published by The Aluminum Association.
Copper and Brass Materials for Electrical Stamping Components
Copper alloys are chosen specifically for electrical conductivity, and the right grade and finish depend on the application:
Phosphor bronze — retains spring elasticity after forming, used where the part needs to flex and return to shape — such as the conductive spring contacts inside power strips
Pure copper — no spring elasticity, typically tin-plated after forming for conductivity and corrosion protection
Brass, nickel-plated — used for terminal socket plugs (both male and female pin components), common in household electrical connectors
Brass, nickel-plated then tin-plated — an additional finish layer for parts needing both conductivity and extra corrosion resistance
From the factory floor: These aren’t theoretical material options — we run all four of these copper/brass variants through progressive die tooling, from coil to finished part, for connector and terminal components used in everyday household electrical products.
How Material Thickness Affects Metal Stamping Performance
Thickness isn’t just a spec line — it changes what the die has to do:
Thinner material (0.2–0.3mm) — easier to form but more prone to wrinkling in deep draws and can be harder to hold flat
Mid-range (0.5–1mm) — the most common range for brackets and structural stamped parts
Heavier gauge (3mm+) — requires higher tonnage and more robust die construction, and forming radii need more clearance
Thickness also directly affects tooling design and press tonnage requirements, which is why it needs to be locked in before die design starts, not adjusted afterward.
Important Material Properties for Metal Stamping
| Property | Why It Matters |
|---|---|
| Tensile strength | Determines how much load the finished part can handle |
| Yield strength | The point at which the material permanently deforms |
| Hardness | Affects tool wear and forming difficulty |
| Elongation / Ductility | How much the material can stretch or bend before cracking |
| Corrosion resistance | Determines coating needs and service life in the application environment |
A material with higher strength is not always the better stamping choice — higher hardness can improve durability but also increases forming difficulty and tooling wear. For OEM parts, the right material is a balance between performance requirements, manufacturability, and total project cost, not a search for the single “strongest” option.
Material Surface Treatment After Metal Stamping
| Material | Common Surface Treatment |
|---|---|
| Steel | Zinc plating, powder coating, painting |
| Stainless Steel | Passivation (often no coating needed) |
| Aluminum | Anodizing (natural or black) |
| Copper / Brass | Nickel plating, tin plating |
How Metal Stamping Materials Affect Tooling Design
Material choice changes the die itself, not just the part:
Die clearance — harder or thicker materials need different punch-to-die clearance to cut cleanly without excessive burr
Tool wear — abrasive or high-hardness materials wear punches and dies faster, affecting maintenance schedules
Forming force — higher-strength materials require more press tonnage to achieve the same bend or draw
This is why our engineering team reviews material grade and thickness before finalizing die design — the same part geometry in two different materials can require two different tooling approaches.
Metal Stamping Material Standards and Quality Requirements
Material quality control includes:
Material certificates (MTC) — verifying grade against the mill test certificate rather than trusting a coil label
Thickness tolerance — checked on incoming material before production
Hardness testing — confirming material condition matches what the forming process requires
Material specifications and testing requirements may reference standards published by ASTM International.
Common Material Problems During Metal Stamping
Cracking — usually from exceeding the material’s formability limit, often at tight bend radii or in deep draws without proper material condition (see the annealing example above)
Springback — the material’s tendency to partially return to shape after bending, which die design has to compensate for based on the specific material’s yield strength
Burrs — related to die clearance not being matched correctly to material hardness and thickness
Deformation — material strength not matching the part’s load requirements in its final application
Deep Drawing Materials: Stainless Steel Case Study
Case 1 — 304 Stainless Steel Mesh: Because stainless steel becomes harder during cold working, direct deep drawing without proper material preparation can cause cracking. For this project, annealing treatment was required before forming. The heat treatment restored material ductility and allowed the stainless steel to achieve the required shape.
Case 2 — Heavy-Duty Truck Bearing Housing: The part started from a flat steel sheet and required deep drawing, stamping, projection welding, zinc plating, and plastic overmolding after forming. For this type of automotive structural component, material selection had to account for forming capability during deep drawing, strength after forming, welding compatibility, and corrosion protection — the final material and process combination was chosen based on the complete application requirement, not material price alone.
These two cases point to the same lesson for OEM buyers: the material grade alone does not determine stamping success. Material condition, thickness, tooling design, and forming process all affect the final result. You can see more real production examples on our case studies page.
How OEM Buyers Can Reduce Cost Through Material Selection
Cost reduction in material selection isn’t about picking the cheapest raw material — it’s about:
Material utilization — a die layout that minimizes strip scrap lowers effective material cost per part
Scrap rate — a material poorly matched to the forming process increases reject rate, which costs more than a slightly pricier material would have
Production volume alignment — at high volume, a material with better formability can reduce tooling wear and maintenance cost over the life of the die
Metal Stamp Factory Material Capabilities
Metal Stamp Factory was established in 2014 in Xiamen, China, focusing on custom metal stamping and precision hardware manufacturing. The founder of Metal Stamp Factory, Shengtong Chen, started learning mold making and metal stamping at the age of 17 and has accumulated more than 25 years of hands-on manufacturing experience in tooling development, metal stamping, and OEM production.
Our material experience covers stainless steel, carbon steel, galvanized steel and ZAM-coated steel, aluminum (including anodized finishes), and copper/brass alloys (including phosphor bronze, pure copper, and nickel/tin-plated brass) for OEM customers across solar, automotive, electrical, and industrial applications. Learn more about our custom metal stamping services and production capabilities.
How We Help Customers Select the Right Material Before Production
Before production, we review customer drawings, material requirements, tolerance requirements, and application conditions. In many OEM projects, customers provide drawings with dimensions and functions but don’t always know which material grade is the most suitable — our engineering team reviews the working environment, forming requirements, strength requirements, surface treatment needs, and production volume before recommending a material, based on manufacturing feasibility rather than only comparing spec sheets.
If you are unsure which material is suitable for your metal stamping project, send us your drawings or samples. Our engineering team can provide material recommendations based on manufacturing feasibility and application requirements.
Material selection is only one part of a successful project — OEM buyers should also know how to choose a metal stamping manufacturer before starting production.
Request a Free Material Consultation
Not sure which material fits your part? Send your drawing, application environment, and target quantity — our engineering team will review it and recommend a material and forming approach before you commit to tooling.
Metal Stamping Materials FAQ
What are the most common materials used in metal stamping? Stainless steel, carbon steel, galvanized steel, aluminum, copper, and brass are the most common — material choice depends on strength, corrosion resistance, conductivity, and cost requirements for the specific part.
What is the best material for metal stamping parts? There’s no single best material — it depends on the application. Carbon steel suits cost-sensitive structural parts, stainless steel suits corrosion resistance, aluminum suits lightweight applications, and copper/brass suit electrical conductivity.
Can stainless steel be used for deep drawing? Yes, but stainless steel work-hardens during cold forming, which can reduce ductility. Deeper draws often require annealing between forming stages to restore ductility and prevent cracking.
How do I choose the right material for OEM stamped parts? Start with the application environment (indoor/outdoor/corrosive), then check strength and formability requirements, surface treatment needs, and production volume — material selection should happen before die design, not after.
Does material selection affect metal stamping cost? Yes, both directly (raw material cost) and indirectly — a material poorly matched to the forming process increases scrap rate and tooling wear, which often costs more over a production run than choosing a slightly more expensive, better-suited material upfront.