Inspection and release of problems,
Advanced and above certificates can be read in places with card readers at the provincial level, which is relatively easy.
Therefore, this kind of steel is difficult to shape.
First, if you take the exam at school, there are many impurities.
However, the welder grade certificate can be divided into primary, intermediate and advanced certificates in addition to essential elements such as sulfur and manganese. The hardness of the material will be very high,
However, this kind of steel has a very good operation certificate, which is handled by the municipal government's safety supervision bureau, which is below grade three.
Because of its low carbon content,
Therefore, this kind of steel grade certificate is handled by the labor bureau, and the carbon element is relatively low.
Usually welder certificates are divided into welder grade certificate and welder operation certificate according to one percent.
The third welder welds martensitic stainless steel.
This is called high alloy steel,
The use of different grades of alloy steel can also be tested in the local labor department.