4J38 free cutting low expansion alloy features
It has a low linear thermal expansion coefficient in the range of 20 ~ 100 ℃, and is easy to cut.
4J38 Free cutting low expansion alloy
Various instruments, instrument parts, and resonators that require stable dimensions.
chemical composition(%)
|
Alloy |
C≤ |
S≤ |
P≤ |
Si≤ |
Mn≤ |
Se |
Ni |
Fe |
|
4J38 |
0.05 |
0.02 |
0.02 |
0.20 |
0.8 |
0.10~0.25 |
35.0~37.0 |
margin |
Average linear expansion coefficient
|
Alloy |
Sample heat treatment system |
Average linear expansion coefficient a/10-6·K-1 |
Inflection point /℃ |
|
20 ℃~400 ℃ |
|||
|
4J38 |
In a protective atmosphere or vacuum, heat to 850 ℃ ~ 900 ℃, keep it for 1 hour, and cool it to below 400 ℃ at a speed of not more than 300 ℃ / h |
7.0~9.0 |
≥390 |
The above data is for reference only. Please contact us for specific requirements
Shenzhen Zhengjie Metal Material Co., Ltd.
Contact person: Mr. Huang (13480167607)
Sales Hotline: 0755-81718772
Q Q: 2263040115 305084123
Website: www.szzj168.com
Email: 2263040115@qq.com
Address: No. 8, Songzi Park, Minzhi, Longhua New District,Shenzhen
