電工鋼硅鋼片：Q/BQB 485－20214示例 1：B23G110 表示公稱厚度為 0.23mm 的普通型取向電工鋼，牌號比總損耗名義值的保證值 P1.7/50不大于 1.10W/kg；示例 2：B30P105 表示公稱厚度為 0.30mm 的高磁極化強度型取向電工鋼，牌號比總損耗名義值的保證值P1.7/50不大于 1.05W/kg；示例 3：B27R090 表示公稱厚度為 0.27mm 的磁疇細化型取向電工鋼，牌號比總損耗名義值的保證值 P1.7/50 不大于 0.90W/kg；示例 4：B23HS080 表示公稱厚度為 0.23mm 的耐熱刻痕磁疇細化型取向電工鋼，牌號比總損耗名義值的保證值 P1.7/50不大于 0.80W/kg；示例 5：B23RD080 表示公稱厚度為 0.23mm 的配電變壓器專用磁疇細化型取向電工鋼，牌號比總損耗名義值的保證值 P1.7/50不大于 0.80W/kg；示例 7：B27RT090 表示公稱厚度為 0.27mm 的特高壓變壓器專用磁疇細化型取向電工鋼，牌號比總損耗名義值的保證值 P1.7/50不大于 0.90W/kg；示例 7：B27P100-LM 表示公稱厚度為 0.27mm 的高磁極化強度型低噪聲系列取向電工鋼，牌號比總損耗名義值的保證值 P1.7/50不大于 1.00W/kg示例 8：B27G140-NC 表示公稱厚度為 0.27mm 的普通型無涂層系列取向電工鋼，牌號比總損耗名義值的保證值 P1.7/50不大于 1.40W/kg

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