top / product&technology



Stainless steel is defined as a steel alloy dissolved and refined from materials in which the main component is rust-resistant iron, containing roughly 10.5% or more of chrome and, if needed, additional nickel and other elements (such as silicon, manganese, phosphor, and sulfur). Its strength as a material include its high corrosion resistance, high heat resistance and high shock resistance.

Hard finish
Stainless steel wire for precision springs

0.080mm 〜 0.500mm

Ultrafine stainless steel wire

0.010mm 〜 0.070mm

High-precision stainless steel wire

0.020mm 〜 0.200mm

Soft finish
Ultrafine soft stainless steel wire

Solid solution treatment to
0.080mm 〜 0.500mm


Piano wire is a metal wire made from carbon steel. While there are numerous types of piano wire, in general piano wire refers to the type used for springs. Piano wire needs to have few nonmetallic or other impurities and to have homogeneous chemical ingredients. Due to its high stress tolerance and resistance to metal fatigue, it is used widely as wire for precision cutting and as a material in coil spring.
A strength of our piano wire is its extremely smooth surface. Our piano wire product lineup includes type A wire, highly durable type B wire, and even stronger wires.

Piano wire for precision strings

0.080mm 〜 0.300mm

Ultrafine piano wire

0.010mm 〜 0.070mm

High-precision piano wire

0.020mm 〜 0.200mm


Phosphor bronze is an alloy consisting mainly of copper, tin and phosphor. Depending on the volume of tin contained, it can have a wide range of distinctive qualities. With superior performance mainly in the areas of resistance to fatigue, corrosion and abrasion as well as electro-conductivity, it is used as a material for springs realizes stable coiling through use of our own drawing methods.

Phosphor bronze wire

0.100mm 〜 0.200mm