T/CHBAS 19-2022 Active Group standards

T/CHBAS 19-2022 High-purity tungsten components

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

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Basic Information

Standard Code: T/CHBAS 19-2022

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: Integrated Communication and Broadcasting

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 high-purity tungsten components. This document applies to the manufacture, inspection (testing), and acceptance of high-purity tungsten components. Main technical contents: The grades of high-purity tungsten components are indicated by "W" followed by "G" and an Arabic numeral, where the Arabic numeral represents the chemical composition grading. The products are divided into three grades: WG1, WG2, and WG3 according to their chemical composition. The composition, purity, and state of the grades comply with the provisions in Table 1. The chemical composition of high-purity tungsten components shall comply with the provisions in Table 2. The dimensions, specifications, and structural forms of high-purity tungsten components are generally determined according to the drawings provided by the buyer. After being agreed upon by both parties and specified in the order form, they can be produced. If the buyer does not provide allowable deviations, the allowable deviations of the dimensions of high-purity tungsten components shall comply with the requirements of the f (precision) deviations in Tables 1, 2, and 3 of Chapter 5 of GB/T 1804-2000. The grain size G of high-purity tungsten components shall comply with the provisions in Table 3, and the grain size distribution shall be uniform. There shall be no defects such as layering, looseness, inclusions, or air holes in high-purity tungsten components. The density of high-purity tungsten components shall not be less than 19.15 g/cm3, and the density fluctuation range of tungsten components in the same batch shall not exceed 0.3 g/cm3. The surface roughness Ra value of high-purity tungsten components shall meet the requirements of the drawings. If there are no requirements in the drawings, the Ra value shall not exceed 1.6 μm.