Electronic Industry Standard of the People's Republic of China SJ/T10536.1--94 Tungsten needle alloy wire 1994-08-08 Issued 1994-12-01 Implementation The Ministry of Electronics Industry of the People's Republic of China Issued Electronic Industry Standard of the People's Republic of China Tungsten needle alloy wires Tungsten-thoriumallog wires Subject Content and Scope of Application SJ/T10536.1-94 1.1 This standard specifies the technical requirements, test methods, inspection rules, packaging, marking, transportation and storage of tungsten needle alloy wires. 1.2 This standard applies to tungsten needle alloy wires manufactured by powder metallurgy method for electric vacuum devices, electric light sources, etc. (hereinafter referred to as products). 2 Reference standards GB3312 Determination of dioxide in tungsten needle alloy - Gravimetric method GB4324 Chemical analysis method for tungsten 3 Product classification 3.1 Product naming The product brand consists of three parts, represented by WThX. WThX Percentage of dioxide Chemical element symbol of needle Chemical element symbol of tungsten Example: WTh7 means that the content of dioxide in tungsten needle alloy is 0.7%×10%. 3.2 Brand, use, specification 3.2.1 The brand and use of the product shall comply with the provisions of Table 1. Table 1 Manufacture of hooks, springs, high-temperature electrodes, cathodes of gas discharge light sources, etc. for electron tubes. Manufacture of cathodes, grids, high-temperature electrodes, resistant filaments, etc. for electron tubes. Manufacture of cathodes, grids, high-temperature electrodes, resistant filaments, etc. for electron tubes. 2 The specifications of the product shall comply with the provisions of Table 2. 3.2.2 Approved by the Ministry of Electronics Industry of the People's Republic of China on August 8, 1994 and implemented on December 1, 1994 Maximum diameter Minimum diameter 4 Technical requirements 4.1 Chemical composition SJ/T10536.1-94 The chemical composition of the product shall comply with the provisions of Table 3. Table 3 4.2 Size Tungsten content shall not be less than Needle dioxide content 0.70~0.99 1.00~1.49 1.50~1.99 4.2.1 The allowable deviation of the diameter of the product shall comply with the provisions of Table 5. Table 5 Diameter (d) 150d300www.bzxz.net 300≤d350 350d500 200mmWire weight deviation Total content of impurity elements Not more than Each impurity element Content not more than Diameter deviation 4.2.2Each shaft or roll of product shall be wound with one wire, and its shortest length shall comply with the provisions of Table 6. The number of short wire shafts allowed in each submitted batch shall not exceed 10%. 4.2.3 Diameter (d) 150300 300 Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.