GB/T 4461-2020 in English
VALIDThermostat metal strip
- Issued on:2020-06-02
- Implemented on:2021-01-01
- File Format:PDF
- Delivery:Via email within 5 business days
$301.00
| Standard No: | GB/T 4461-2020 |
| Document status: | VALID |
| Title in English: | Thermostat metal strip |
| Title in Chinese: | 热双金属带材 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 5 business days |
| Issued on: | 2020-06-02 |
| Implemented on: | 2021-01-01 |
| Superseding: |
GB/T 4461-2007 Thermostat bimetal strip
|
| ICS Classification: | 77.140.99-Other iron and steel products |
| Chinese Classification: | H58-Precision alloy |
| Professional Classification: | GB-National Standard |
| Related Keywords: | thermostat metal strip introduction core changes
temperature curvature version performance indicators specific main parameter warm curvature main assessment value grade system |
| Related Topics: | bimetallic effect
metal building materials Xishuang Scrap Metal metal heat Metal material double spray Automobile metal parts double 85 bimetallic phenomenon gb4461 diatomic metal GBT4461 GB/T 4461-1992 GB/T 4461-2007 GB/T 4461-2020 hot bimetal Jin Shuanggen bimetal gbt4461-2020 |
《GB/T 4461-2020热双金属带材》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
Core changes in the standard revision
| Revision dimensions | 2007 version | 2020 version |
|---|---|---|
| Performance indicators | Specific bending as the main parameter | Warm curvature as the main assessment value |
| Grade system | 4-digit code | New system of 5J+warm curvature + resistivity |
| Material range | 38 grades | 11 new grades including 5J2209 |
Analysis of key performance indicators
Temperature curvature (F): The new version of the standard takes temperature curvature as the core assessment indicator, and its calculation formula is:
F = δ·(1/R2-1/R1)/(T2-T1)
The temperature curvature of typical grade 5J3810 reaches 37.8×10-6/℃, which is suitable for the temperature range of -20~200℃.
Implementation suggestions
- When selecting, pay attention to the matching of temperature curvature and resistivity.
- For strips with thickness > 0.5mm, it is recommended to use Level II bonding strength test.
- The newly added 5J3840 grade is suitable for high resistivity scenarios (41.6μΩ·cm)
Typical application cases
5J2075 performs well in circuit breaker thermal elements. Its corrosion resistance (Ni20Co26Cr8 component) and 166000MPa elastic modulus can meet harsh working conditions.
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