电工钢硅钢片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

电工钢硅钢片镰刀弯产品的镰刀弯规定仅适用于切边供货的状态。在任意 2m 测量长度上，钢带的镰刀弯应不大于2mm。供方如能保证，可不进行该项检测。7.3.5 毛刺高度剪切毛刺高度的规定仅适用于以切边交货的材料。剪切毛刺高度应不大于0.035mm。7.3.6 残余曲率产品的残余曲率通过测试钢片的底边和支撑板间的距离确定。钢带的残余曲率应不超过35mm。供方如能保证，可不进行该试验。7.4 技术特性Q/BQB 480－202187.4.1 约定密度用于计算产品的磁性能和叠装系数的约定密度应符合表 3、内蒙古鄂尔多斯表 4 的规定。如需采用其他约定密度，须供需双方协商后确定。

电工钢硅钢片一般要求电机、内蒙古鄂尔多斯当地变压器和其他电器部件效率高，耗电量少，体积小和重量轻。电工钢板通常是以铁芯损耗和磁感应强度作为产品磁性保证值磁感应强度是铁芯单位截面积上通过的磁力线数，也称磁通密度，它代表材料的磁化能力，单位为T。电工钢板的磁感应强度高，铁芯的激磁电流（也称空载电流）降低，铜损和铁损都下降，可节省电能。当电机和变压器功率不变时，磁感应强度高，设计Bm可提高，铁芯截面积可缩小，这使铁芯体积减小和重量减轻，并节省电工钢板、内蒙古鄂尔多斯当地导线、内蒙古鄂尔多斯同城绝缘材料和结构材料用量，可降低电机和变压器的总损耗和制造成本，并且有利于大变压器和大电机的制造、内蒙古鄂尔多斯同城安装和运输。