T/CHBAS 18-2022 Active Group standards

T/CHBAS 18-2022 Superhigh purity tungsten wire

Publish Date: 2022-02-21 Implement Date: 2022-02-21 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Price: $ 20.00

Out of stock

Basic Information

Standard Code: T/CHBAS 18-2022

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: Non-ferrous metals and their alloy products

ICS Name: Other non-ferrous metals and their alloys

Publish Date: 2022-02-21

Implement Date: 2022-02-21

Scope

Scope: This document specifies the requirements, test methods, inspection rules, marking, packaging, transportation, and storage for ultra-high purity tungsten wires. This document is applicable to the manufacture, inspection (testing), and acceptance of ultra-high purity tungsten wires. Main technical contents: Ultra-high purity tungsten wires are indicated by the status symbol WU. The tungsten wire grade, composition, purity, and status shall comply with the provisions of Table 1. The chemical composition of ultra-high purity tungsten wires shall comply with the provisions of Table 2. The diameter of tungsten wires and their allowable deviations shall comply with the provisions of Table 3. After processing, the microstructure of Φ0.81mm tungsten wires shall be inspected. The structure should be filamentary and uniform, meeting the requirements of Figures 1 and 2. There should be no defects such as layering, cracking, or air bubbles in the interior of ultra-high purity tungsten wires. The density of ultra-high purity tungsten wires shall be not less than 19.15 g/cm3, and the density fluctuation range of the same batch of tungsten wires shall not exceed 0.3 g/cm3. After high-temperature heat treatment, ultra-high purity tungsten wires shall not break when bent. The surface of black tungsten wires shall be smooth and uniformly black; there shall be no defects such as cracks, burrs, scratches, pits, dirt, or oil stains. There shall be no roughness when touching them with the hand. The surface of white tungsten wires shall be smooth and clean, with a uniform silvery-grey color and a metallic luster; there shall be no defects such as cracks, burrs, scratches, pits, or roughness.