Piano steel wire is also called piano steel wire, which belongs to high carbon steel. The piano steel wire is cold drawn after quenching in a lead bath. It has a very high strength limit and elastic limit, and is a widely used small spring material. The quality and performance of the steel wire are strictly required. In addition to the tensile test, it also needs to be tested for changes, corrosion, and sharp carbon. According to the use, it can be divided into piano steel wire used to make various important springs, various high-stress mechanical springs and valve springs.

Uses: Used to make steel wire for strings, valve springs and high-stress springs.

Features: It has the characteristics of high strength, elasticity, fatigue resistance, creep resistance and resistance, lubrication and clean appearance, strong rust resistance and good music performance. Steel for steel wire includes carbon steel and stainless steel. Carbon piano steel wire is made of high-carbon high-quality carbon structural steel and carbon tool steel. The content of sulfur and phosphorus in steel must not exceed 0.025%, and the content of copper must not exceed 0.20%. The diameter of the piano wire is about 0.08～6mm. Each coil of steel wire shall consist of one steel wire, and no welded joints are allowed. The steel wire should have regular tensile strength and change properties. The depth of the total decarburization layer on one side of the piano steel wire used as the valve spring shall not exceed 1% of the wire diameter. The surface of the steel wire must not have cracks, folds, scars, tears, oxide scale and rust, and the appearance of the steel wire is not polished, polished, and coated. The coated steel wire has the characteristics of brightness, beauty and abrasion resistance. Coating materials include cadmium, tin and zinc-nickel alloy.

Hangzhou Co., Ltd. is located in the west of Shenzhen City, Guangdong Province, with the Pearl River Estuary in the west, Longgang District in the east, Nanshan District and Futian District in the south, Lingdingyang in the west and Dongguan in the north. Convenient road traffic: Guangshen Expressway, Jihe Expressway, Meiguan Expressway, Longda Expressway, Nanguang Expressway, Yanjiang Expressway, etc.; National Highway: 107 National Highway; Baoan Avenue, Nanguang, Nanping, Fulong and other roads.