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：表 3 普通型 A、陜西商洛同城應力退火型 AR、陜西商洛同城型 AH 產品磁性能和技術特性（續(xù)）類型 牌號公稱厚度mm 比總損耗名義值P1.5/50 W/kg 比總損耗P1.5/50 W/kg小磁極化強度J5000a T比總損耗各向異性T1.5/50b ％小疊裝系數(shù)小彎曲次數(shù)約定密度kg/dm3 應力退火型c B35AR300 0.35 3.00 2.98 1.73 ±10 0.95 10 7.80B50AR3000.503.00 2.98 1.72 ±120.9710 7.75B50AR350 3.50 3.48 1.74 ±10 10 7.80B50AR500 5.00 4.90 1.72 ±10 10 7.85B50AR600 6.00 5.50 1.72 ±8 10 7.85型B35AH2300.352.30 2.28 1.66 ±170.952 7.65B35AH250 2.50 2.45 1.67 ±17 2 7.65B35AH300 3.00 2.80 1.69 ±14 5 7.70B50AH3000.503.00 2.90 1.68 ±140.975 7.65B50AH350 3.50 3.00 1.71 ±14 5 7.70B50AH470 4.70 3.50 1.72 ±12 10 7.75B50AH600 6.00 4.00 1.72 ±10 10 7.75a頻率在 50Hz 的磁極化強度；b供方如能保證，可不提供。需方如有特殊要求，應在訂貨時協(xié)商；c應力退火型產品的磁性能是試樣在 750℃±10℃下，經 2 小時應力退火后的測量值。