There are seven materials used for hardware stamping parts of sofa legs. Although there are many materials, their popularity in the market varies, and some are outdated.

The properties of materials used for stamping are closely related to production. They directly affect the stamping process design, the quality and service life of products, and the balanced production and cost.

Cold-Rolled Steel Plate: Cold rolling uses hot-rolled coils as raw materials and is rolled at room temperature below the recrystallization temperature. Cold-rolled steel plate, referred to as cold plate, is produced by the cold rolling process. The thickness of cold-rolled plate is generally between 0.1 and 8.0mm, with most factories producing plates less than 4.5mm thick. The thickness and width of cold-rolled plate are determined according to the equipment capacity and market demand of each factory.

 

SPCC: S stands for Steel, P stands for Plate, C stands for Cold, and C stands for Commercial, which is the Japanese JIS standard.

SPCD: Stands for cold-rolled carbon steel sheets and strips for stamping, equivalent to China's 08AL (13237) high-quality carbon structural steel.

SPCE: Stands for cold-rolled carbon steel sheets and strips for deep drawing, equivalent to China's 08AL (5213) deep drawing steel.

 

Galvanized Steel Sheet: Galvanized steel sheet is a welded steel sheet with a hot-dip or electroplated zinc layer on the surface.

 

Electro-Galvanized Steel Sheet (SECC): Uniform gray, mainly imported, fingerprint-resistant, with excellent corrosion resistance, and maintains the processability of cold-rolled sheet. Application: home appliances, computer case shells, and some door panels.

Hot-Dip Galvanized Steel Sheet (SGCC): Dip-plated, bright white, with small zinc flowers (difficult to see) and large zinc flowers showing clear hexagonal patterns.

Main characteristics: corrosion resistance, paintability, formability, and spot weldability. It is mainly used for small household appliances that require good appearance. However, it is more expensive than SECC, so many manufacturers use SECC to save costs.

 

Stainless Steel: The abbreviation for Steel Use Stainless in the Japanese JIS standard refers to stainless steel plate. According to the hardness, there are 1/4H, 1/2H, 3/4H, H (full hard), and EH (hardened). Stainless steel is also a common material for sofa legs, and its strong corrosion and rust resistance is favored by the general public.

 

Aluminum and Its Alloys:

Pure Aluminum: Pure aluminum is divided into three categories according to its purity: high-purity aluminum, industrial high-purity aluminum, and industrial pure aluminum. Welding mainly uses industrial pure aluminum, with a purity of 99.7% to 98.8%, and grades L1, L2, L3, L4, L5, L6.

Aluminum Alloy: Aluminum alloy is obtained by adding alloy elements to pure aluminum. At present, most mainstream metal hardware accessories use aluminum alloy to produce sofa legs.

 

Copper and Its Alloys:

Definition: Copper is a metal element, chemical symbol Cu. Pure copper is a soft metal. Its surface is red-orange with metallic luster when freshly cut, and the single substance is purple-red. It has good ductility, high thermal conductivity, and electrical conductivity, so it is the most commonly used material in cables and electrical and electronic components. It can also be used as a building material and can form many kinds of alloys.

Copper Alloys: Copper alloys have excellent mechanical properties and low resistivity, among which bronze and brass are the most important. In addition, copper is also a durable metal that can be recycled many times without damaging its mechanical properties.

 

Tinplate:

Definition: Tinplate is the common name for electroplated tinned steel sheet, abbreviated as SPTE in English, which refers to cold-rolled low-carbon steel sheet or strip with tin on both sides. It combines the strength and formability of steel with the corrosion resistance, solderability, and beautiful appearance of tin in one material. It has the characteristics of corrosion resistance, non-toxicity, high strength, and good ductility. It is generally used to produce shielding products. Some users also require manufacturers to use this material for sofa legs.

 

Manganese Steel:

Definition: Manganese steel, also known as manganese alloy steel, is a high-strength steel, mainly used in harsh working conditions such as impact, extrusion, and material wear