1. To identify the stainless steel materials ordered by imports or steel mills, generally only need to check the marks on the steel or packaging according to the quality certificates of the imports or steel mills.
The quality certificate is the supplier's confirmation and guarantee of the inspection results of the batch of products. Therefore, the quality certificate not only states the name, specification, number of delivered pieces, weight, and delivery status of the material, but also must state all the inspection results of the specified guarantee items.
Similarly, in order to facilitate management, avoid confusion and prevent use accidents caused by confusion, the manufacturer marks the brand number, batch number, status, specification, quantity, and manufacturer code on the material or packaging. The marked mark should be consistent with the content of the quality certificate. The commonly used marking methods mainly include the following three types: painting (paint the color to indicate its brand on the specified part of the material), printing (stamp or spray print on the specified part of the material to indicate the material's brand, specification, furnace number, etc. , Often used on thick steel plates or large and medium-sized steel), listing (on bundles or boxes of materials, hanging signs indicating the brand number, batch number, specification, quantity, etc.).
The signs of stainless steel are generally printed and listed.
2. The society has overstocked stainless steel materials. According to the length of the overstocking time and the quality of storage, there are generally two situations:
One is that the overstocking time is not long, and the storage is good. The processing unit not only keeps the original quality certificate or copy, but also the signs on the steel or packaging are complete and clear. For the identification of this kind of stainless steel, as long as the mark on the steel or packaging is also checked according to the quality certificate.
The other is that the backlog is long and the storage is not perfect. There is no quality certificate, and the marks on the steel or packaging are not obvious or fall off. For the identification of this type of stainless steel, it is mainly to conduct in-depth investigation and research, and consult the original documents with the processing unit. Generally speaking, the original documents such as invoices are marked with steel numbers and so on. If there is no record of the steel number, the local price data at that time must be consulted to determine the steel number based on the price. This is a more effective way to determine the steel grade, but it is often easy to show up. Therefore, it is necessary to master the identification method of the physical object.
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