Document Details |
|||||
| Name of Department/Committee : | MTD 09 | ||||
|---|---|---|---|---|---|
| Document Number : | MTD 09 ( 22141) | ||||
| Document Title [English] : | Thoriated tungsten wires and rods - Specification(First Revision) | ||||
| Document Title [Hindi] : | थोरियेटेड टंगस्टन तार एवं छड़ें - विशिष्टि (पहला पुनरीक्षण) | ||||
| Document Type : | Revision | ||||
| Language : | English | ||||
| Priority : | 3 | ||||
| ICS Code : | 77.150.99 | ||||
| Date of Project Approval : | 17-03-2023 | ||||
| Standards to be Revised : |
|
||||
| Standards to be Superseded : |
|
||||
Classification Details |
|
| Group : | Metals, Alloys and Metal Products (including Steel Products) |
| Sub Group : | Non ferrous metals and their alloys |
| Sub Sub Group : | Sn, Mo, W, etc |
| Aspects : | Product Specification |
| Risk : | None |
| Certification : | Voluntary Certification |
| Short Commom Man's Title : | Thoriated tungsten wires and rods for lighting and electronic applications |
| ITCHS Code : | NA |
| Ministry : | |
| Sustainable development Goals : | |
| Degree of Equivalence : | Indigenous |
| Identical/Equivalent Standards : | |
| Organization Type: | |
Division Council Chairperson Approval Details |
|||||||||||
|
|||||||||||
::Cross Referenced Indian Standard:: |
|||
| Sl. No. | Is No & Year | IS Title | |
| 1 | IS 1387: 1993 | General requirements for the supply of metallurgical materials (Second Revision) | |
| 2 | IS 11900: 1986 | Specification for tungsten rods and tungsten wire for lamps and electron devices | |
| Sl.No. | Synosis Points | |
| 1 | Thoriated tungsten wires and rods are intended for use as directly heated cathodes for thermionic emission in vacuum tubes. Thoriated tungsten rods also find wide application as electrodes for TIG welding. Addition of thoria (ThO) having smallest particle size and homogeneous distribution increases the high temperature strength, recrystallization temperature and decreases electron work function of tungsten considerably. This standard has been prepared as a guide for the manufacturers and users of thoriated tungsten wires and rods for obtaining the desired characteristics. This standard covers the requirements of two types of thoriated tungsten wires and rods containing 1 percent thoria (Grade 1) and 2 percent thoria (Grade 2) which are intended for use in electron/vacuum tubes, for TIG welding and other lighting and electronic devices. | |
Timeline Details |
|||||||
|
|
|||||||
|
|||||||
|
|||||||