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电工钢硅钢片：比总损耗(铁损)specific total loss (iron loss)比总损耗是指磁极化强度按正弦变化，其峰值和频率为特定值时，单位质量材料所吸收的总功率，比总损耗用符号 P (Jm/f)表示，单位为 W/kg（或 W/lb）。例：P1.7/50表示在磁极化强度在 1.7T、当地频率在 50Hz 下测得的单位 kg（或 lb）试样的比总损耗；P1.7/60表示在磁极化强度在 1.7T、当地频率在 60Hz 下测得的单位 kg（或 lb）试样的比总损耗。3.2 磁极化强度(磁感应强度)magnetic polarization (magnetic induction)磁极化强度是指试样受交变磁场磁化时，特定磁场强度峰值的磁极化强度峰值，其符号为 J(H)，单位为 T(特斯拉)。例：J800表示对应于磁场强度 H 为 800A/m（用峰值表示）下的磁极化强度。3.3 比视在功率 specific apparent power对于设定的磁极化强度和频率值，磁化单位质量的铁芯所消耗的交流电源总功率为比视在功率，其符号为 Ss，单位为 VA/kg。例：Ss1.7/50表示磁极化强度在 1.7T、当地频率在 50Hz 下测得的单位 kg 试样的比视在功率。3.4 A 计权磁致伸缩速度水平 A-weighted magnetostriction velocity level,LVA 当磁极化强度随时间按正弦规律变化，其峰值为某一标定值，变化频率为某一标定频率时，单位长度电工钢片（带）沿磁化方向上发生磁致伸缩所引起的表面振动声压水平为 A 计权磁致伸缩速度水平。
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
电工钢硅钢片半有机无铬薄涂层K H4 C-5 EC-5-P C-6涂层通常以磷酸盐无机成分为主，添加少量有机成分，不含有铬元素，杜绝了用户退火、本地发蓝和使用过程中发生六价铬含量超标的可能性，性、本地环保性 。性能基本接近A 涂层，绝缘性好，冲片性好，在中性气氛或弱还原性炉子气氛中，可承受的应力退火温度一般可达800℃，在退火时，层间电阻会有一定降低。半有机无铬厚涂层M --- C-5 EC-5-P C-6涂层基本情况和 K 涂层类似，膜厚增加，绝缘性更好，耐蚀性更好，冲片性也更好，焊接性略差。
