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：密度用于計(jì)算磁性能和疊裝系數(shù)的約定密度為 7.65×103 kg/m3。7.4.2 疊裝系數(shù)產(chǎn)品的小疊裝系數(shù)應(yīng)符合表 3、廣東陽(yáng)江同城表 4、廣東陽(yáng)江同城表 5、廣東陽(yáng)江同城表 6、廣東陽(yáng)江同城表 7、廣東陽(yáng)江同城表 8 和表 9 的規(guī)定。7.4.3 彎曲次數(shù)產(chǎn)品平行于軋制方向的小彎曲次數(shù)應(yīng)不小于 1 次。供方如能保證，可不進(jìn)行該試驗(yàn)。7.4.4 由內(nèi)應(yīng)力引起的剪切邊的偏差產(chǎn)品應(yīng)盡可能量避免出現(xiàn)內(nèi)應(yīng)力。根據(jù)需方要求，并在合同中注明，可對(duì)寬度不小于 500mm 的材料（縱切分條后的材料）檢測(cè)由內(nèi)應(yīng)力引起的剪切邊偏差，其縫隙測(cè)量值應(yīng)不超過(guò) 1mm。供方如能保證，可不進(jìn)行該試驗(yàn)。8 檢驗(yàn)和試驗(yàn)8.1 一般要求8.1.1 按本文件簽訂訂貨協(xié)議時(shí)，用戶可按GB/T 17505規(guī)定進(jìn)行規(guī)定檢驗(yàn)和試驗(yàn)或非規(guī)定檢驗(yàn)和試驗(yàn)。然而，對(duì)于非規(guī)定檢驗(yàn)和試驗(yàn)，制造方應(yīng)提供所需產(chǎn)品的比總損耗值和磁極化強(qiáng)度值。8.1.2 當(dāng)按規(guī)定檢驗(yàn)和試驗(yàn)訂貨時(shí)，用戶應(yīng)明確 GB/T 18253 中的檢驗(yàn)文件的類型。