GB/T 3630-2017 in English
VALIDNiobium sheet, strip and foil
- Issued on:2017-10-14
- Implemented on:2018-05-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$156.00
| Standard No: | GB/T 3630-2017 |
| Document status: | VALID |
| Title in English: | Niobium sheet, strip and foil |
| Title in Chinese: | 铌板材、带材和箔材 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2017-10-14 |
| Implemented on: | 2018-05-01 |
| Superseding: |
GB/T 3630-2006 Niobium sheet，strip and foil
|
| ICS Classification: | 77.150.99-Other products of non-ferrous metals |
| Chinese Classification: | H63-Rare refractory metals and their compounds |
| Professional Classification: | GB-National Standard |
| Related Keywords: | version chemical composition basic chemical composition requirements refine
niobium sheet niobium plates niobium materials standard frameworks standard content requirements |
| Related Topics: | Foil
GBT3630 GBT3630-1983 GB/T 3630-2006 GB/T 3630-2017 Niobium Plate America |
《GB/T 3630-2017铌板材、带材和箔材》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
Interpretation of the National Standard of the People's Republic of China GB/T 3630—2017
Background and Significance of the Standard
GB/T 3630—2017 "Sawn Plates, Strips and Foil" is a national standard of the People's Republic of China, which is used to regulate the production and quality requirements of niobium (Nb) and its alloy materials. This standard replaces the previous GB/T 3630—2006 version and has made a number of improvements in technical requirements and normativeness.
Comparison of standard frameworks
| Standard content | Requirements of the 2006 version | Improvements of the 2017 version |
|---|---|---|
| Chemical composition | Basic chemical composition requirements | Refine chemical composition indicators and add restrictions on impurity elements |
| Dimensional deviation | Uniform tolerance range | Graded tolerance requirements, separate provisions for Grade I and Grade II |
| Mechanical properties | Basic tensile strength requirements | Add grain size and hardness requirements, and refine performance indicators under different states |
Analysis of major technical changes
Refinition of chemical composition
The new standard specifies the chemical composition of niobium plates, strips and foils in more detail, adds content limits for a variety of alloying elements, and clarifies the maximum allowable values of impurity elements. These changes help improve the consistency and reliability of materials.
Grading of dimensional deviation
The new standard divides the thickness, width and length deviations of products into two levels: Class I and Class II. Class I is suitable for products with high precision requirements, while Class II is used for general industrial applications.
| Thickness range(mm) | Grade I deviation | Grade II deviation |
|---|---|---|
| 0.01~0.03 | ±0.002 | ±0.003 |
| >0.03~0.05 | ±0.004 | ±0.005 |
Enhancement of mechanical properties
The new standard increases the requirements for grain size and Vickers hardness, and at the same time refines the mechanical performance indicators under different thicknesses and states. For example:
- Nb1, Nb2 plates: tensile strength increased from ≥165MPa to ≥245MPa (cold worked state)
- FNb1, FNb2 plates: specified plastic elongation strength increased from ≥85MPa to ≥175MPa
Technology Evolution and Application Trends
With the widespread application of niobium materials in high-end fields such as aerospace, electronics and medical care, the material performance requirements are increasing. The revision of GB/T 3630—2017 reflects the following technological development trends:
- High precision: Stricter control of dimensional deviation to meet the needs of precision manufacturing
- High performance: Improved mechanical performance indicators to adapt to extreme environmental requirements
- Green: New requirements for grain size and hardness to promote material recycling and reuse
Implementation suggestions
Manufacturers
Suggestions for enterprises:
- Establish a sound quality management system to ensure that the chemical composition and mechanical properties meet the standard requirements
- Invest in advanced testing equipment, such as Vickers hardness tester and grain size analyzer
- Optimize the production process, especially the heat treatment process, to meet the new grain size and hardness requirements
Users
Recommendations for users:
- Strictly follow the standards for acceptance, especially focus on key performance indicators such as tensile strength and grain size
- Establish a long-term quality tracking mechanism to ensure the stability of materials during use
- Maintain close communication with suppliers to jointly optimize product technical requirements
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