Sheet metal parts are hardware parts made of thin plates. The commonly used plates in sheet metal processing include cold rolled plate , galvanized plate , hot rolled plate , aluminum plate, copper and stainless steel And so on, according to the different functions of sheet metal parts, the materials used are different, generally need to consider the use and cost of sheet metal parts.
1.Cold rolled sheet：Cold-rolled sheet is the most commonly used sheet metal material. It is mostly used as the base material for other materials. It has high hardness and is not easy to deform, but this material is very easy to rust. The cost of the sheet is low, the sheet is easy to form, and the thickness of the sheet is less than or equal to 3.2mm.
2.Hot-rolled sheet：The hot-rolled sheet has higher carbon content than the cold-rolled sheet, so the hardness is lower than that of the cold-rolled sheet, and the ductility is better, but it is easier to rust than the cold-rolled sheet. The cost of the plate is low, but it is difficult to form. It is mainly used for flat parts, and the thickness of the plate is greater than or equal to 3.0mm.
3.Galvanized sheet，Galvanized sheet is divided into electro-galvanized sheet and hot-dip galvanized sheet.
3.1Electro-galvanized sheet is the result of chemical reaction produced by cold-rolled sheet as the basic material of electroplating. It has relatively high hardness and good corrosion resistance, and is widely used;
3.2Hot-dip galvanized sheet is the result of physical changes caused by cold-rolled sheet as the base material electroplating. The zinc layer is slightly thicker, the hardness is relatively high, and the ductility is relatively poor. Galvanized sheet is expensive.
4.Copper: It is mainly used for conductive materials, and the cost is high.
5.Aluminum plate: Aluminum plate has low density and strong corrosion resistance, but it is easy to be oxidized when exposed to water, so it is widely used. Sheets are expensive and available in silver- or nickel-plated aluminum.
6.Stainless steel: 304 stainless steel and 301 stainless steel are widely used in stainless steel.
6.1 304 stainless steel plate is relatively heat-resistant and has strong corrosion resistance, but its ductility and plasticity are relatively poor;
6.2 301 stainless steel has strong compressive ability, good ductility and plasticity, but poor corrosion resistance.
Influence of material on bending process
Sheet metal processing requires the sheet to be bent and formed. It is not easy to crack during bending, and the rebound deformation after bending is small, so that accurate bending can be achieved.
1. Cold-rolled sheet is especially suitable for sheet metal bending due to its good ductility. In addition, because the cold-rolled sheet needs subsequent surface treatment, the defects caused during the bending process can be covered up. It is the easiest material to bend.
2. Stainless steel plates have new requirements for bending. Generally speaking, stainless steel plates require no scratches on the surface. During normal bending, there will be sliding friction between the sheet and the lower die, and creases will be formed. This is not allowed for stainless steel materials.
3. Aluminum plate and copper plate. These two materials are somewhat similar to stainless steel. The surface is not allowed to have scratches and indentations. It is easier to crack when bending. This requires sheet metal bending operators to use different bending methods according to different situations.
4. Hot-rolled steel sheet is the sheet metal that is most afraid of folding and the most difficult sheet to be folded. The elongation is also not very good, and cracks are prone to occur during the bending process. Therefore, it is listed as the most difficult material for sheet metal bending and the most afraid of bending.
The above are the matters needing attention in sheet metal processing commonly used sheet metal and bending processing. Do you want to know more about sheet metal processing? Platinum Shield will continue to give you more knowledge about sheet metal processing.
English 
Chinese