Clad Metals (Materials Composed of Different Metals)


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

Total thickness: 0.10~1.0mm Width: 3.0~about90mm *Available ranges will change according to alloys types. |
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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 |