Shenzhen Prolean Technology Co., Ltd.

CNC Machining


Metal Stamping

Stamping is another sheet metal fabrication process that finds use in all kinds of industries. Stamping is a rapid process that generates parts with complex geometries at relatively lower costs. Almost everything that industries want from a process.

Prolean’s stamping services produce cost-effective complex parts for medical, robotics, automobile, aviation, and other industries with high accuracy.

Metal Stamping
Quality Assurance

Quality Assurance

Competitive pricing

Competitive Pricing

Timely Delivery

Timely Delivery

High Precision

High Precision

What is Metal Stamping?

Stamping or pressing is an umbrella term for multiple sheet metal fabrication processes which use presses and dies. Some of the stamping processes are:

• Coining: Pressing sheet metal to form patterns on the surface. Coin mints use the process and is also the reason behind its name.

• Drawing: Pressing sheet metal to stretch it into a new shape. Cup and can manufacturing uses metal sheets drawing.

• Curling: Press turns sheet metal into tube-shaped products.

• Ironing: Process of reducing thickness of sheet metal with a press.

• Hemming: Folding of edges of sheet metal. Cans and automobile panels have hemmed edges.

stamping machine

Quality Assured:

Dimension Reports

On-time Delivery

Material Certificates

Tolerances: +/- 0.1mm or better on request.

How Does Stamping Work?

Stamping employs a press with a die to form the sheet metal into required shape. There are multiple types of dies and stamping processes but the process remains essentially the same in all cases. Sheet metal is placed on the press table and positioned over the die. Next, the press with a tool applies pressure on sheet metal over the die and forms the material into the required shape.

Progressive dies can perform multiple operations on a sheet by using stages for different operations to form a part on single press.

How Does Stamping Work

Advantages of Metal Stamping

Prolean has the advanced presses and capabilities for all types of stamping processes. We offer latest dies for complex stamping of precision parts with low material wastage. It is also why Prolean stamping offers competitive prices for best quality stamped parts.

From coining and embossing to long drawing and curling, Prolean’s expert engineers can produce parts with tight tolerance requirements in different quantities.

What Materials Are Available For Stamping?

Aluminum Steel Stainless Steel Copper Brass
Al5052 SPCC 301 101  C360
Al5083 A3  SS304(L) C101  H59
Al6061 65Mn SS316(L)    62
Al6082 1018      



Prolean offers a wide variety of materials for Stamping. Please see the list for a sample of the materials we work with.

If you require material not on this list, please do get in touch as it is likely we can source it for you.

As Machined

Our standard finish is an “as machined” finish. It has a surface roughness of 3.2 μm (126 μin). All sharp edges are removed and parts are deburred. Tool marks are visible.


A finishing CNC machining operation can be applied to the part to reduce its surface roughness. The standard smoothing surface roughness (Ra) is 1.6 μm (64 μin). Machine marks are less evident but still visible.


Brushing is produced by polishing the metal with grit resulting in a unidirectional satin finish. Not advisable for applications where corrosion resistance is required.

Passivation part


Passivation is a treatment method to protect the metal from corroding, it generates a more uniform formation of a passive surface that is less likely to react with air and cause corrosion chemically.

Anodizing hardcoat

Type III anodizing provides excellent corrosion and wear resistance, suitable for functional applications.



Electropolishing is an electrochemical process used to polish, passivate and deburr metal parts. It is useful to reduce surface roughness.

Chromate conversion coating


Chromate conversion coating(Alodine/Chemfilm) is used to increase the corrosion resistance of metal alloys while maintaining their conductive properties.

Bead blasting

Bead blasting adds a uniform matte or satin surface finish on a machined part, removing the tool marks. This is used mainly for visual purposes and comes in several different grits which indicate the size of the bombarding pellets. 


Powder coating is a strong, wear-resistant finish that is compatible with all metal materials and can be combined with bead blasting to create parts with smooth and uniform surfaces and excellent corrosion resistance.

Black Oxide

Black Oxide

Black oxide is a conversion coating used to improve corrosion resistance and minimize light reflection.


Here is a list of standard surface finishes. For custom surface finishes or other surface finish options, please check our surface treatment service

Choose The Right Finish For Your Material

Different surface finishes can be applied to different materials. Find below a quick cheat sheet of surface finish and material compatibility.

Name Material Compatibility
Smooth machining (1.6 Ra μm/64 Ra μin) All plastics and metals
Bead blasting All metals
Powder coating All metals
Anodizing clear (type II) Aluminum alloys
Anodizing color (type II) Aluminum alloys
Anodizing hardcoat (type III) Aluminum alloys
Brushing + Electropolishing (0.8 Ra μm/32 Ra μin) All metals
Black oxide Stainless steel and copper alloys
Chromate conversion coating Aluminum and Copper alloys
Brushing All metals

Ready To Quote?

If the Material and finishing you need are not one of the above, please feel free to contact us for more available.