C1720 - UNS C17200 | Beryllium Copper

Nonferrous Metals

Copper Alloys

C1720 - UNS C17200 | Beryllium Copper

Non-Magnetism
Fatigue Properties
Precipitation/Age Hardening
Conductivity
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Overview & Features

C1720, called "Beryllium copper for springs" is a material that can be age hardened.
Fatigue resistance and electrical conductivity increase after age hardening treatment. Normally, age-hardening treatment is performed after the forming process, but materials that have been pre aged as mill hardened materials are also available. (We are not able to do mill-hardened treatment.).
It is used for high performance springs, diaphragmss, clicks, connectors, etc.

Available Shapes

Standard
Chemical Composition
Physical Properties
Related Products

Standards

Standards are listed as equivalent or similar to our materials, so please use them as a reference.

JIS

C1720 (H3130)

UNS/CDA

C17200

Chemical Composition

[Composition] Cu-Ni18-Zn20
JIS standard value of chemical composition is shown in the table below.

Physical Properties

Density

8.26 g/cm³

Specific Heat

377 J/(kg・K)

Electrical Resistivity

6.5 μΩ・cm

Young's Modulus

118 GPa

Thermal Expansion

17.0×10-6/K

Thermal Conductivity

126 W/(m・K) (25℃)

Melting Range

871-982 ℃

Magnetism

Non-magnetism

Related Products

Re-rolling (Processing Service)

With our rolling technology and facilities we have developed over many years as a rerolling company, we also offer contract rolling (rerolling) of materials provided by our customers, as well as rerolling of market materials.
Heat treatment and cutting (slitting) can also be added as needed, allowing for flexibility in adjusting not only thickness but also hardness and width.

Features of our rerolling service is as follows:

(1) Compatible with various materials
We can produce a wide range of nonferrous metals, including carbon steels and stainless steels, as well as copper and copper-based alloys, aluminums, and nickel alloys.
(2)Small lots (single sheet or narrow coils) to large coils (hundreds of kilograms/coil) are available.
(3) Flexibility to adjust hardness and width
It is possible to add heat treatment and cutting (slitting) to achieve the desired temper and dimensions.
(4) Flexibility to adjust thickness（e.g., thickness 0.127mm, etc., applicable to inch equivalent size）
(5) Ultra thin foil（e.g., thickness 0.030mm, etc.）
(6) High-precision thickness tolerance（depends on materials）
(7) Short lead time for specified specifications
In the fastest case, custom-made materials can be shipped in as little as a few weeks.
(8) Materials provided by the customer can be either free of charge or paid.

Please order in the following situations:

・Looking for special material with custom specifications
・To make effective use of long-term inventory
・To get initial prototype materials in very small lots

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