(1) Hot-rolled silicon steel sheet for electrical engineering (GB5212-85) The hot-rolled silicon steel sheet for electrical engineering is made of silicon-iron soft magnetic alloy with low carbon loss, and is hot-rolled into a sheet with a thickness of less than 1mm. Hot-rolled silicon steel sheet for electrical purposes is also called hot-rolled silicon steel sheet. Hot-rolled silicon steel sheet can be divided into two kinds of steel sheet with low silicon (Si≤2.8%) and high silicon (Si≤4.8%) according to the silicon content.
(II) Cold-rolled silicon steel sheet for electrical purposes (GB2521-88) The electrical silicon steel containing 0.8% -4.8% silicon is used as the material and is cold-rolled. Cold-rolled silicon steel sheets are divided into two types: grain-oriented and grain-oriented steel strips. Cold-rolled electrical steel strip has the characteristics of flat surface, uniform thickness, high stacking coefficient, and good punchability, and it has higher magnetic induction and lower iron loss than hot-rolled electrical steel strip. Using cold strips instead of hot-rolled strips to make motors or transformers, the weight and volume can be reduced by 0% -25%. If the cold-rolled oriented belt is used, the performance is better. Using it to replace the hot-rolled or low-grade cold-rolled belt can reduce the power consumption of the transformer by 45% -50%, and the transformer performance is more reliable. Used in the manufacture of motors and transformers. Generally, a grain-oriented cold-rolled strip is used as a state of a motor, a welding transformer, or the like; a grain-oriented cold-rolled strip is used as a core of a power transformer, a pulse transformer, a magnetic amplifier, and the like.
(3) Hot-rolled silicon steel sheet for home appliances (GBH46002-90) The grade of hot-rolled silicon steel sheet for home appliances is represented by J (home) D (electricity) R (hot rolled), which is JDR. The figure after JDR is the iron loss value * 100, and the figure after the horizontal line is the steel plate thickness (mm) * 100. The requirements for the electromagnetic performance of hot-rolled silicon steel sheets for home appliances can be slightly lower, and the minimum value of iron loss (P15 / 50) is 5.40W / kg. Generally delivered without washing. Differential motors for household appliances such as electric fans, washing machines, vacuum cleaners, range hoods, etc.