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Piano Wire

Using carefully selected raw material combined with a strict quality control in manufacturing process, our piano wire has been widely used for high-end market of quality spring wire. In responding to varied request depending on application and shape of coil spring, we will offer different surface profile, diameter tolerance , and packing.

Specification for Piano Wire under JIS G3522 Specification and J-Witex Standard

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Diameter
(mm)
Diameter Tolerence(mm) Tensile Strength(N/mm²) Standard Packing
JIS J-Witex Standard SWP-A SWP-B Block Diameter
(mm)
Coil Weight
(kg)
0.40 ±0.008 +0.005 - 2600~2840 250 10
0.50 2550~2790 300 20
0.55 ±0.010 +0
-0.010
2260~2500 2500~2750
0.60 2210~2450 2450~2700 25
0.70 2160~2400 2400~2650
0.80 2110~2350 2350~2600
0.90 2110~2300 2300~2500
1.00 2060~2260 2260~2450 400 50
1.20 ±0.015 +0
-0.015
2010~2210 2210~2400 550 125
1.40 1960~2160 2160~2350
1.60 1910~2110 2110~2300
1.80 1860~2060 2060~2260
2.00 1810~2010 2010~2210
2.30 ±0.020 +0
-0.020
1770~1960 1960~2160 650
2.60
2.90 1720~1910 1910~2110
3.20 1670~1860 1860~2060
3.50 ±0.030 +0
-0.030
1670~1810 1810~1960
4.00 750 140
4.50 1620~1770 1770~1910
5.00
5.50 1570~1710 1710~1860
6.00 ±0.040 +0.010
-0.040
1520~1670 1670~1810
6.50 -
7.00 1470~1620

*For the diameters between written sizes, each specification number for larger diameter is applied.
It's our pleasure, depending on customer's application and processing condition, to make customized specification of varied requirement for surface condition, mechanical properties, special sizes and packing etc.

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