The opening of the slab is a relatively colloquial name. In the revised GB709, the open slab and the original slab should be called shear steel and single rolled steel respectively.
When the steel plates come out of the steel mill, they are rolled up. The flat plates that are flattened by the machine are called "opening plates". Just like the whole roll of toilet paper, the stress level in the open plate is higher, so the dimensional stability is poor. With the different process parameters during the opening operation, the internal stress distribution is also different, and there will be different bearing capacities in different directions of vertical length. And this carrying capacity is difficult to measure with general strength indicators. Therefore, when the flat plate is welded, there will be a large welding deformation, which is difficult to adjust. Therefore, the flat plate can not be used for parts with high appearance quality requirements.
The open flat plate is a steel plate whose steel pipe is originally shipped from the factory and has a certain thickness and a certain thickness and width according to the user's requirements.
The original flat plate was rolled into the size required by the national standard when it was shipped from the steel mill.
Generally, the original flat plate has strict size, good performance and high price. The opening plate is relatively cheap and the size is slightly different.
The flat plate has a thickness of 1.5-20mm and is made of Q235 and Q345.
The main use is on non-pressurized containers and tanks.
Sharp Blade, used to cut things like wallpaper, so it is called "wallpaper knife", also known as "art knife". Decoration, decoration, advertising plaque industry is often used.
The most important feature of wallpaper knife is to use the segmented blade which is easy to replace. When using, it can fold off the non sharp section. It can keep the sharpness all the time without sharpening the knife.
Art knife, also known as carving knife or wallpaper knife, is a kind of knife used for art and handicrafts. It is mainly used to cut soft things. It is mainly composed of plastic handle and blade. It is a pull-out structure. There are also a small number of metal tool handles. Most of the blades are inclined. They can be broken along the line of the blade body with blunt blade. New blade appears, which is convenient to use. There are various sizes of art knives.
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