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2 供貨形式6.2.1 產(chǎn)品以卷供貨，簡稱鋼卷。鋼卷的重量應(yīng)符合訂貨要求，卷重一般3～10 噸，特殊卷重應(yīng)在訂貨時協(xié)商并在合同中注明。6.2.2 鋼卷通常以切邊狀態(tài)交貨。用戶有特殊要求時，應(yīng)在訂貨時協(xié)商并在合同中注明。6.2.3 鋼卷內(nèi)徑應(yīng)在 500mm～520mm 范圍內(nèi)，鋼卷內(nèi)徑為 508mm。6.2.4 鋼卷應(yīng)由同一寬度的鋼帶連續(xù)、河北秦皇島附近緊密卷繞，卷的側(cè)面應(yīng)盡量平直，自重下不塌卷。6.3 交貨狀態(tài)鋼帶以終退火并兩面涂敷絕緣涂層的狀態(tài)交貨。6.4 表面質(zhì)量6.4.1 鋼帶表面應(yīng)光滑清潔，無油脂，無銹漬，無影響使用的缺陷。6.4.2 鋼帶表面允許存在不影響材料正常使用的在厚度偏差允許范圍內(nèi)的基板缺欠、河北秦皇島本地絕緣涂層缺欠，如輕微劃傷、河北秦皇島本地色差、河北秦皇島本地輥印、河北秦皇島本地斑紋等缺欠。