GB/T 21183-2017 in English
VALIDZirconium and zirconium alloy sheet, strip and foil
- Issued on:2017-09-29
- Implemented on:2018-04-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$136.00
《GB/T 21183-2017锆及锆合金板、带、箔材》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
In-depth interpretation of the National Standard of the People's Republic of China GB/T 21183-2017
Standard background and technical evolution analysis
GB/T 21183-2017 replaces the old version GB/T 21183-2007, and has been comprehensively revised mainly for the technical requirements of zirconium and zirconium alloy plates, strips and foils. The new version of the standard has important improvements in product classification, chemical composition, dimensional tolerances and mechanical properties to meet the higher demands of modern industry and nuclear industry.
Product Classification and Brands
The product brands of zirconium and zirconium alloy plates, strips and foils are divided into two categories: general industry and nuclear industry, as follows:
| Classification | General Industry | Nuclear Industry | ||||
|---|---|---|---|---|---|---|
| Brand | Zr-1 | Zr-3 | Zr-5 | Zr-0 | Zr-2 | Zr-4 |
Comparative Analysis of Dimensions and Allowable Deviations
The allowable deviations of thickness, width and length vary significantly in different versions of the standard. The following is a comparison of key data:
| Item | GB/T 21183—2007 | GB/T 21183—2017 | ||
|---|---|---|---|---|
| Thickness allowable deviation | - | - | Refined to different width ranges | ±0.003 ~ ±0.25 |
| Width allowable deviation | ±5 | ±10 | ±1.5 ~ ±4.0 | ±1.5 ~ ±5.0 |
| Allowable length deviation | ±10 | ±20 | ±8 | ±10 ~ ±15 |
Mechanical properties and corrosion requirements
Plates for nuclear industry need to meet higher mechanical properties. Typical data are as follows:
- Tensile strength Rm ≥ 400 MPa
- Specified plastic extension strength Rp0.2 ≥ 240 MPa
- Elongation after fracture A50mm ≥ 25%
Ultrasonic inspection and grain size requirements
Plate for nuclear industry shall be ultrasonically inspected to ensure that there are no internal defects. In terms of grain size, the average grain size of products with a thickness of ≤4.8mm shall reach Grade 7 or higher in GB/T6394.
Implementation suggestions
- Quality control:Chemical composition, dimensions and mechanical properties shall be strictly inspected in accordance with the standards to ensure that the products meet the contract requirements.
- Inspection method:GB/T228.1 and GB/T228.2 shall be used for tensile tests, and GB/T6394 shall be used for grain size rating.
- Surface treatment:Pay attention to keep the product surface smooth and clean to avoid oxidation and corrosion, especially the foil shall meet strict roughness requirements (Ra ≤1.25 μm).
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