SJ/T 10536.1-1994 Tungsten-Thorium Alloy Wire SJ/T10536.1-1994 Standard Download Decompression Password: www.bzxz.net

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
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