Products

The copper products manufactured by Kiyomine Metal Industry meet the various needs of the world and are used in a wide range of products, from products closely tied daily life, to automobiles, smartphones, and the advanced electronic products.
A comfortable and convenient life --- It all begins with Kiyomine.
Kiyomine envisions the future, empowers dreams, and plays a vital role in Japan’s manufacturing industry.

Nickel silver is a ternary alloy composed of copper(Cu), nickel(Ni), and zinc(Zn).Generally, Ni enhances spring properties, Zn improves strength, and Cu contributes to ductility.It is characterized by a beautiful silvery-white luster, excellent strength and elasticity, corrosion resistance, and workability.The heat-discoloration-resistant nickel silver (HCR series), which excels in resisting discoloration at high temperatures, has a proven track record in soldering processes under atmospheric conditions.
Nickel silver is a ternary alloy composed of copper(Cu), nickel(Ni), and zinc(Zn).Generally, Ni enhances spring properties, Zn improves strength, and Cu contributes to ductility.It is characterized by a beautiful silvery-white luster, excellent strength and elasticity, corrosion resistance, and workability.The heat-discoloration-resistant nickel silver (HCR series), which excels in resisting discoloration at high temperatures, has a proven track record in soldering processes under atmospheric conditions.
Sheet and Strip Products
Wire and Rod Products

Click here for various technical documents
(C7521、C7451、C7701、HCR-C7521、HCR-C7701)

Sheet and Strip Products
Wire and Rod Products

Click here for various technical documents
(C7521、C7451、C7701、HCR-C7521、HCR-C7701)

Phosphor bronze is a Cu-Sn-P alloy. Its properties vary depending on the tin (Sn) content.It is not only strong and tough but also highly resistant to corrosion, offers excellent ductility, and has good solderability and plating characteristics, making it suitable for a wide range of applications.We offer a diverse lineup, including general-purpose phosphor bronze (Sn: 4–8%) and spring-grade phosphor bronze (Sn: 8–10%).
Phosphor bronze is a Cu-Sn-P alloy. Its properties vary depending on the tin (Sn) content.It is not only strong and tough but also highly resistant to corrosion, offers excellent ductility, and has good solderability and plating characteristics, making it suitable for a wide range of applications.We offer a diverse lineup, including general-purpose phosphor bronze (Sn: 4–8%) and spring-grade phosphor bronze (Sn: 8–10%).
Sheet and Strip Products
Wire and Rod Products

Click here for various technical documents
(C5191、C5212、C5111、C5102、C5210、C5240)

Sheet and Strip Products
Wire and Rod Products

Click here for various technical documents
(C5191、C5212、C5111、C5102、C5210、C5240)

As electrical and electronic components become increasingly miniaturized and lightweight, with higher-density mounting, the materials used to construct them tend to be thinner and more refined.Additionally, these materials are expected to withstand harsh operating environments, such as high temperatures.To meet these diverse needs, we offer a wide range of products, including the KA250 Corson alloy.
As electrical and electronic components become increasingly miniaturized and lightweight, with higher-density mounting, the materials used to construct them tend to be thinner and more refined.Additionally, these materials are expected to withstand harsh operating environments, such as high temperatures.To meet these diverse needs, we offer a wide range of products, including the KA250 Corson alloy.
Sheet and Strip Products
Wire and Rod Products

Click here for various technical documents (KA250、 KA1025、MB115、MF202)

Sheet and Strip Products
Wire and Rod Products

Click here for various technical documents (KA250、 KA1025、MB115、MF202)

Product Development

Companies must continuously explore new markets to ensure sustainable growth.
For this reason, we are committed to product development, recognizing it as a major endeavor essential to our future growth.

Development Examples

  • Functional Plating Technology

    Functional plating is widely used to enhance surface properties such as corrosion resistance, electrical connectivity, and solderability.
    Kiyomine manufactures reflow tin plated strips, matte tin plated strips, and nickel plated strips.

  • Original Alloy Development

    Kiyomine actively pursues the development of new alloys and has obtained multiple patents.
    Our diverse lineup includes KA250 (Corson alloy), KA1025 and MF202 (phosphor bronze-based), and MB115 (nickel silver-based), each tailored for specific performance and applications.
    Click here for technical documents

  • Profile Wire Forming Technology

    We are capable of producing shaped wires and rods such as square, hexagonal, and eyeglass-type profiles.
    This technology enables the reduction of machining losses in cut parts and the elimination of secondary processes such as bending, resulting in cost savings.

  • Die Drawing Technology

    The tool used in wire drawing, called a “die,” features a conical hole with a wider entrance and narrower exit.
    Our strength lies in the ability to repair and process these highly precise dies in-house, meeting precise dimensional requirements.

Manufacturing Equipment

  • Continuous Casting Machine
    Continuous Casting Machine

    Continuous Casting Machine

  • Intermediate Rolling Mill
    Intermediate Rolling Mill

    Intermediate Rolling Mill

  • Annealing Furnace
    Annealing Furnace

    Annealing Furnace

  • Plating Line
    Plating Line

    Plating Line

  • Finishing Rolling Mill
    Finishing Rolling Mill

    Finishing Rolling Mill

  • Wire Drawing Machine
    Wire Drawing Machine

    Wire Drawing Machine

Major Clients.

Here are some of our long-standing clients that have been using our products over the past several decades.

  • ・Seiko Epson Corporation
  • ・Tanaka Precious Metal Technologies Co., Ltd.
  • ・Panasonic Corporation

Technical Documens

Product Items Overview

Heat Discoloration Resistant Nickel Silver HCR-C7521&C7701