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Clad Metals (Materials Composed of Different Metals)

clad2en
Main applications

Resistors, thermal protectors, printer springs, connector shells, various contacts, keyboard springs, shield cases, surge absorbers, relays, power window contacts, battery components, membrane switches, fire alarm contacts, and more


Product size range

Total thickness: 0.10~1.0mm 

Width: 3.0~about90mm 

*Available ranges will change according to alloys types. 

 
Manufacturing sites

JAPAN


  • Product overview Features
  • Standards & Chemical composition
  • Tokkin Advantages
  • Other

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Product overview

Clad metals are materials composed of two or more different types of metal. They are high functionality metal materials that possess composite properties that cannot be obtained from single materials.

As clad metals are diffusion bonded (i.e. alloyed via elemental diffusion) at the boundary surfaces between the different metals, there is less chance that they will peel off like plating.

Clad metals can help reduce total costs by allowing you to eliminate processes, increase quality, reduce lead time, and make other improvements.

Diagram: Standard cladding shapes

Features

• As bonded surfaces are held together by metallic bonding, the bond is the strongest possible (bonded metals will not peel off).

• Cladding layers can be made thick (e.g. several 100 μm), allowing the transfer of high currents.

• Multiple alloys can be bonded.

• Utilize the characteristics of different types of metals (conductivity and strength, weldability and thermal expansion, etc.)

• Hardness can be adjusted by rolling and heat treatment.

• Striped inlay cladding can be produced.

• There are limitations on substrates and overlay metals that can be used for plating , but cladding allows a diverse range of materials.

• Thickness ratio can be adjusted on request for all materials. (Good degree of flexibility)

• Both double-layer and multi-layer products available.

 

Clad metals are unique materials that provide a wealth of possibilities!

Standard size range

Standard size range is indicated in graph below, but actual size range differs according to material combination. Contact Tokkin for more details.

Graph: Standard size range for cladding materials

Example Combinations of Cladding Materials (Past Products)

The table below shows cladding materials that we have manufactured.

We are also happy to consider combinations that are not shown below. Please contact us for more information.

Table: Example Combinations of Cladding Materials (Past Products)

Tokkin Advantages

 Products available with overlays, inlays, edgelays, and stripes

We can manufacture custom-made products to suit your requirements in terms of cladding width, thickness, distance from edge, number of strips, and other features.

 

 Wide inlay clad of 50 mm and up available

 

 Small-lot production

Prototypes for custom-made products can be made in orders as small as several tens of kilograms in weight.

We are also happy to consider even smaller lots upon consultation.

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

 

 High-precision thickness tolerances

We can manufacture materials with more-precise thickness tolerances than general standards-compliant products.

 

 Hardness adjusted to suit your requirements

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

Contact us now to see how we can help.

 

Precious Metals used in Cladding

Name

Nominal Composition (wt%)

Vickers Hardness (HV)

Electrical Conductivity

(IACS%)

Features

Pure silver

99.9 Ag

26

106

For low-current applications

Silver-copper

90Ag10Cu

62

89

High contact pressure. Suited to sliding applications.

80Ag20Cu

85

82

Silver-palladium

70Ag30Pd

70

11

Excellent oxidation resistance

60Ag40Pd

102

7.7

Silver-palladium-copper

40Ag40Pd20Cu

190

7.7

Affordable six-part alloy. Suited to sliding applications.

Silver-nickel

85Ag15Ni

73

88

Better resistance to rear and welding than Ag

Silver braze (BAg-8)

72Ag28Cu

-

-

Liquidus temperature: 780°C

 

Guide to Base Metals & Cladding Materials

Name

Code

Features

Pure copper

C1020

High electrical and thermal conductivity

Phosphor bronze

C5102

High strength and elasticity

C5191

C5212

Brass

C2600

Workability and low cost

C2680

Pure aluminum

A1050/A1100

Lightweight and thermal conductivity

Pure nickel

Ni

High corrosion resistance and strong magnetic properties

Pure iron

SPCC

Versatility, workability, and low cost

SUY

Deep drawability and electromagnetic applications

Stainless steel

SUS304

High corrosion resistance, workability, and elasticity

SUS430

High corrosion resistance, low cost, and magnetism

Iron-nickel alloys

36Ni

Low thermal expansion (mainly used for sealing electron tubes)

42Ni

Iron-nickel-cobalt alloys

KOV

Copper-nickel

CN49

Resistance alloys

Copper-manganese

CM

Nickel-chromium

NCH-1