電工鋼硅鋼片：比總損耗(鐵損) specific total loss (iron loss)比總損耗是在磁極化波形保持正弦，其峰值和頻率為特定值時，單位質量材料所消耗的總功率，比總損耗用符號 P(Jm/f)表示，單位為 W/kg。例：P1.5/50表示在 磁極化強度為 1.5T、河南開封當地頻率為 50Hz 時的比總損耗。3.2 磁極化強度 magnetic polarizationQ/BQB 480－20212磁極化強度是指試樣受交變磁化時，特定磁場強度峰值的磁極化強度峰值，其符號為J(H)，單位為 T(特斯拉)。例：J5000表示對應于磁場強度峰值為 5000A/m 下的磁極化強度峰值。4 分類本文件的材料的等級是根據磁極化強度在1.5T、河南開封當地頻率在50Hz下的 比總損耗名義值P1.5/50(W/kg)、河南開封當地材料公稱厚度進行牌號分類，并按產品特性細分為普通型、河南開封當地應力退火型和型三類。

電工鋼硅鋼片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

電工鋼硅鋼片電工鋼板的磁感應強度高，鐵芯的激磁電流（也稱空載電流）降低，銅損和鐵損都下降，可節省電能。當電機和變壓器功率不變時，磁感應強度高，設計Bm可提高，鐵芯截面積可縮小，這使鐵芯體積減小和重量減輕，并節省電工鋼板、河南開封導線、河南開封絕緣材料和結構材料用量，可降低電機和變壓器的總損耗和制造成本，并且有利于大變壓器和大電機的制造、河南開封安裝和運輸。硅鋼性能的要求主要是：1、河南開封鐵損低，這是硅鋼片質量的重要指標。各國都根據鐵損值劃分牌號，鐵損愈低，牌號愈高。2、河南開封較強磁場下磁感應強度（磁感）高，這使電機和變壓器的鐵芯體積與重量減小，節約硅鋼片、河南開封銅線和絕緣材料等。3、河南開封表面光滑、河南開封平整和厚度均勻，可以提高鐵芯的填充系數。4、河南開封沖片性好，對制造微型、河南開封小型電動機更為重要。5、河南開封表面絕緣膜的附著性和焊接性良好，能防蝕和改善沖片性