B35AV2000

电工钢硅钢片Electrical steel, also known as silicon steel sheet, is an indispensable metal material in the power, electronics, and military industries, and is also the largest functional material in production. It is mainly used as the iron core for various motors, generators, and transformers. Specific total loss (iron loss) is the total power consumed per unit mass of material when the magnetic polarization waveform remains sinusoidal, with a specific peak and frequency. The specific total loss is represented by the symbol P (Jm/f), in W/kg. Example: P1.5/50 represents the specific total loss at a maximum magnetic polarization intensity of 1.5T and a frequency of 50Hz. 3.2 Magnetic Polarization Q/BQB 480-20212 Magnetic polarization intensity refers to the peak magnetic polarization intensity of a specific magnetic field intensity when a sample is subjected to alternating magnetization. Its symbol is J (H), and the unit is T (Tesla). Example: J5000 represents the peak magnetic polarization intensity corresponding to a magnetic field intensity peak of 5000A/m. The material grades in this document are classified based on the nominal maximum specific total loss P1.5/50 (W/kg) at a magnetic polarization strength of 1.5T and a frequency of 50Hz, as well as the nominal thickness of the material. They are further divided into three categories based on product characteristics: ordinary type, stress relief annealing type, and high-efficiency type. Example 1: B35A210 represents a common non oriented electrical steel with a nominal thickness of 0.35mm, and the maximum nominal specific total loss value P1.5/50 is 2.10W/kg； Example 2: B35AR300 represents a stress relieved annealed non oriented electrical steel with a nominal thickness of 0.35mm, and the maximum nominal specific total loss value P1.5/50 is 3.00W/kg； Example 3: B35AH230 represents an efficient non oriented electrical steel with a nominal thickness of 0.35mm, and the maximum nominal specific loss value P1.5/50 is 2.30W/kg. Example 4: 35WW210 represents a normal type WW non oriented electrical steel with a nominal thickness of 0.35mm, and the maximum nominal specific loss value P1.5/50 is 2.10W/kg. Example 5: 35WH230 represents an efficient WH non oriented electrical steel with a nominal thickness of 0.35mm, and the maximum nominal specific loss value P1.5/50 is 2.30W/kg. The classification and code of insulation coatings shall comply with the provisions of Table 2. Table 2 Classification and Code of Insulation Coatings Type Code Characteristics of Insulation Coatings Semi organic Thin Coating A Improves Punching Performance and Has Good Weldability Semi organic Thick Coating H has Good Punching Performance and High Interlayer Resistance Semi organic Chromium Free Thin Coating K does not contain chromium and has good weldability Semi organic Chromium Free Thick Coating M does not contain chromium and has good insulation performance Semi organic Chromium Free Extreme Thick Coating J does not contain chromium and has excellent insulation performance Semi organic Chromium Free Ultra Thick Coating L does not contain chromium and has extremely high insulation performance Self adhesive Coating

电工钢硅钢片绝缘涂层的分类和代号绝缘涂层的分类和代号应符合表2的规定。表 2 绝缘涂层的分类和代号绝缘涂层种类 代号 特征半有机薄涂层 A 改善冲片性，并有良好的焊接性半有机厚涂层 H 冲片性好，层间电阻高半有机无铬薄涂层 K 涂层中不含铬，具有良好的焊接性半有机无铬厚涂层 M 涂层中不含铬，具有良好的绝缘性能半有机无铬极厚涂层 J 涂层中不含铬，具有极好的绝缘性能半有机无铬超厚涂层 L 涂层中不含铬，具有极高的绝缘性能自粘接涂层 Z 涂层中不含铬，固化后具有良好的粘接性能，铁心固定强度大6 一般要求6.1 生产工艺产品的生产工艺和化学成分由制造方决定。6.2 供货形式6.2.1 产品以卷供货，简称钢卷。钢卷的重量应符合订货要求，卷重一般3～10 吨，特殊卷重应在订货时协商并在合同中注明。6.2.2 钢卷通常以切边状态交货。用户有特殊要求时，应在订货时协商并在合同中注明。6.2.3 钢卷内径应在 500mm～520mm 范围内，钢卷内径为 508mm。6.2.4 钢卷应由同一宽度的钢带连续、湖北黄冈紧密卷绕，卷的侧面应尽量平直，自重下不塌卷。6.3 交货状态钢带以终退火并两面涂敷绝缘涂层的状态交货。