GB/T 34471.2-2017 in English
VALIDElastic alloys - Part 2: Constant elastic alloys
- Issued on:2017-10-14
- Implemented on:2018-07-01
- File Format:PDF
- Delivery:Via email within 5 business days
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| Standard No: | GB/T 34471.2-2017 |
| Document status: | VALID |
| Title in English: | Elastic alloys - Part 2: Constant elastic alloys |
| Title in Chinese: | 弹性合金 第2部分：恒弹性合金 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 5 business days |
| Issued on: | 2017-10-14 |
| Implemented on: | 2018-07-01 |
| ICS Classification: | 77.140.99-Other iron and steel products |
| Chinese Classification: | H58-Precision alloy |
| Professional Classification: | GB-National Standard |
| Related Keywords: | elastic components core performance indicatorsfrequency temperature coefficient
elastic alloys constant elastic alloys introduction analysis physical property control frequency component alloys frequency temperature coefficient test |
| Related Topics: | elastic alloy
partial modulus of elasticity Modulus of Elasticity and Elasticity GB/T 34471.2 GB/T 34471.2-2017 elasticity |
《GB/T 34471.2-2017弹性合金 第2部分：恒弹性合金》由TC183（全国钢标准化技术委员会）归口，TC183SC10（全国钢标准化技术委员会特殊合金分会）执行，主管部门为中国钢铁工业协会。
Introduction
Analysis of the core content of the standard
| Technical dimensions | Alloys for frequency components | Alloys for elastic components |
|---|---|---|
| Core performance indicators | Frequency temperature coefficient (±2×10⁻⁶/℃), mechanical quality factor (≥9000) | Elastic modulus temperature coefficient (±36×10⁻⁶/℃), tensile strength (1078-1470MPa) |
| Typical grades | 3J60/3J61/3J59 | 3J53Y/3J62 |
| Smelting requirements | Vacuum induction furnace smelting (3J71 requires vacuum arc remelting) | |
Detailed explanation of key technical requirements
Key points for physical property control
Frequency component alloys need to focus on control:
- Longitudinal vibration wave propagation velocity: 4200-5050m/s (3J60 coupling wire requires 4750-5000m/s)
- Wave velocity consistency: standard deviation ≤15m/s (3J62 alloy)
- Mechanical quality factor: 3J59 requires ≥20000 (high-precision resonant cavity components)
Typical heat treatment process
| Alloy grade | Heat treatment system | Key parameters |
|---|---|---|
| 3J53 | 500-650℃ insulation 2-4h furnace cooling | Young's modulus 177-191GPa |
| 3J60 | 600-700℃ insulation 2-4h furnace cooling | Frequency temperature coefficient±5×10⁻⁶/℃ |
Standard implementation recommendations
Selection guidelines
- Temperature stability requirements: Navigation-level components are preferably 3J59 (βf≤±2×10⁻⁶/℃)
- Electromechanical coupling requirements: Transducer components are recommended 3J60 (Q≥15000)
- Complex stress conditions: Torsional vibration components are selected class=instrument>3J62 (shear modulus ≥66GPa)
Testing precautions
- Ultrasonic testing shall be carried out in accordance with GB/T4162-2008 Class A (rod ≥12mm)
- The frequency temperature coefficient test shall be subject to the heating and cooling rate of ≤2℃/min
- 3J53YMagnetic testing adopts 24kA/m standard magnetic field
Technology evolution analysis
The main improvements of this standard compared with the old version:
- Added 3J71 alloy (working temperature 125℃)
- Refine the wave velocity consistency index (S≤15m/s)
- Supplement the longitudinal vibration/torsional vibration test method (Appendix A/B)
Sample only — not a preview of GB/T 34471.2-2017
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