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Ultrafine Grained Metal Materials

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Product size range

Steel Grades/

Shapes

Ferrous metals (iron, steel, stainless steel, etc.)

Non-ferrous metals (copper alloys, nickel alloys, etc.)

Thickness

0.030 mm–0.10 mm  

*Contact us if you require a thicker product.

Width

3.0 mm–300 mm

*Depends on grade and thickness. Contact us for more details.

Other

We are happy to adjust the microstructure of the finish to suit the characteristics you require. Please consult us regarding usage conditions and other issues.

Manufacturing sites

JAPAN


  • Product overview Features
  • Tokkin Advantages
  • Physical Properties Mechanical properties

Product overview

Ultrafine-grained metal materials are metal materials with an average grain size refined to around 1 μm.

Controlling the microstructure makes it possible to improve a variety of properties such as strength and fatigue properties, strength–ductility balance, and workability.

 

What are the advantages of a fine-grained material?  

• High strength

Strength can be increased through severe plastic deformation, which produces an ultrafine elongated grain structure.

Increasing strength makes it possible to achieve weight savings by making parts thinner.

*Graph data can be found on the Mechanical and Physical Properties tab.

 

• Improved strength–ductility balance

Subjecting materials to heat treatment after severe plastic deformation produces an ultrafine equiaxial grain structure that improves strength–ductility balance.

This makes it possible to process the metal in a variety of ways without a reduction in strength.

*Graph data can be found on the Mechanical and Physical Properties tab.

 

• Excellent fatigue properties

Improving fatigue properties makes it possible to extend part life.

 

• Excellent workability

 1. Reduction of surface roughness

The ultrafine structure makes it possible to reduce surface roughness during metalworking processes (e.g. bending).

Reduces surface roughness

 

 2. Stable sheared surface when pressed

When using normal materials with large crystal structures, after pressing, material comes off pressed sections as the product is used. However, with our ultrafine grained steels it is possible to stabilize the contours of micro-sheared surfaces.

Stable stamped surfaces

 

Tokkin Advantages

 High quality and reliability

 We make products to order, and can adjust hardness as required. Our ability to produce uniform strength and thickness tolerances that are impossible to achieve using regular materials allows us to manufacture products that demonstrate stable strength in spring applications.

Moreover, we can produce excellent fatigue resistance and reliability by adjusting material structure and by creating a high degree of cleanliness via the careful management of manufacturing history and the adjustment of chemical composition.

 

 Excellent workability improves yield by reducing the occurrence of chipping during stamping

 The excellent workability of our ultrafine-grained steels makes it possible to minimize chipping during stamping to create stable stamped surfaces.

It also reduces surface roughness during bending and drawing, and can improve precision in micro stamping.

Helps combat variation in shape of machined surfaces

 

 Ultrathin foils

 We can manufacture ultra thin sheets of 0.030 to 0.099 mm.

 

 Select your surface finish

 By changing the roll used in the rolling process, we can offer a bright or dull finish.

If required we can also provide a hairline finish (outsourced).

 

 Small-lot production

 We can manufacture standard lots weighing 300 kg,

 and are also happy to consider smaller lots upon consultation.

 (Requests for small-lot orders will be dealt with on a case-by-case basis.)

          

 High-precision thickness metal materials

 We make products to order, and can adjust hardness as required.

We can make products with thickness tolerances that are more demanding than JIS standards, and boast the highest quality in the industry.

Strength–ductility Balance

Strength can be increased through severe plastic deformation, which produces an ultrafine elongated grain structure.

This process requires care because it results in decreased ductility and increased anisotropy. It can overlap with other strengthening mechanisms such as precipitation and martensitic hardening, making it impossible to obtain the desired effects.

High strength

 

Strength

Subjecting materials to heat treatment after severe plastic deformation produces an ultrafine equiaxial grain structure that improves strength–ductility balance.

Strength is equivalent to a 1/2 H or 3/4 H finish. This process is not effective for grades with a high degree of work hardening such as SUS301 and SUS304.

High strength comparison chart