GB/T 3875-2017 in English
VALIDTungsten sheet
- Issued on:2017-07-12
- Implemented on:2018-06-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$156.00
| Standard No: | GB/T 3875-2017 |
| Document status: | VALID |
| Title in English: | Tungsten sheet |
| Title in Chinese: | 钨板 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2017-07-12 |
| Implemented on: | 2018-06-01 |
| Superseding: |
GB/T 3875-2006 Tungsten sheet
|
| ICS Classification: | 77.120-Non-ferrous metals |
| Chinese Classification: | H63-Rare refractory metals and their compounds |
| Professional Classification: | GB-National Standard |
| Related Keywords: | tungsten plates
tungsten sheet introduction standard background 3875-2017 tungsten plate national standard tungsten plates adds machined tungsten |
| Related Topics: | tungsten
Tungsten plate process Tungsten wavelength surgical tungsten Tungsten drop GB/T 3875-2017 Thiourea Tungsten Tungsten GBT3875 GBT3875-1983 GB/T 3875-2006 GB/T 3875-2017 |
《GB/T 3875-2017钨板》由TC243（全国有色金属标准化技术委员会）归口，TC243SC3（全国有色金属标准化技术委员会稀有金属分会）执行，主管部门为中国有色金属工业协会。
Introduction
Standard Background and Purpose
GB/T 3875-2017 Tungsten Plate National Standard replaces the previous GB/T 3875-2006 version, and mainly revise the manufacturing method, chemical composition, dimensional deviation and density requirements of tungsten plates. The standard was proposed by the China Nonferrous Metals Industry Association and is managed by the National Technical Committee for Standardization of Nonferrous Metals.
Comparison of standard frameworks
| Dimensions | Old version GB/T 3875—2006 | New version GB/T 3875—2017 |
|---|---|---|
| Product classification | Only covers rolled tungsten plates | Adds technical requirements for machined tungsten plates |
| Chemical composition | No specific grade requirements | Clearly cites the W1 grade regulations in YS/T 659 |
| Dimension deviation | No distinction between thickness ranges | Details of allowable deviations for different thickness ranges |
Technical requirements interpretation
Chemical composition and grade management
The standard clearly states that the chemical composition of tungsten plates should comply with the W1 grade regulations in YS/T 659. This means that all produced tungsten plates must pass chemical analysis to ensure that their impurity content is within the allowable range. For example:
- Iron (Fe): maximum 0.3%;
- Carbon (C): maximum 0.08%;
- Sulfur (S) and phosphorus (P): maximum 0.02% each.
Dimensions and allowable deviations
The standard sets clear requirements for the thickness, width and length of rolled and machined tungsten plates. Take the rolled state as an example:
| Thickness range | Grade I deviation | Grade II deviation |
|---|---|---|
| 0.10～0.20 mm | ±0.02 mm | ±0.03 mm |
Density requirements
The standard has added density requirements for tungsten plates with a thickness of 6~20 mm, as follows:
| Thickness range | Minimum density requirement |
|---|---|
| 0~3 mm | ≥19.20 g/cm³ |
Appearance quality and process requirements
The standard puts forward strict requirements on the appearance quality of tungsten plates, including:
- Delamination and inclusions are not allowed;
- Slight scratches are allowed on the rolled surface, but the depth does not exceed the allowable deviation;
- The surface roughness Ra of the machined surface should be less than 0.6 µm.
Implementation Suggestions
To ensure the effective implementation of the standard, it is recommended that:
- Manufacturers establish a complete chemical composition testing system and calibrate equipment regularly;
- Develop quality control processes for products in different thickness ranges;
- Strengthen research on surface treatment technology to improve the surface quality of machined products.
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