Customization: | Available |
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Alloy: | Alloy |
Certificate: | ISO 9001&RoHS&BV |
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Grade and chemical composition |
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Grade |
Mass fraction (%) |
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C |
P |
S |
Mn |
Si |
B |
Al |
C0 |
Ni |
Cr |
Fe |
|
≤ |
|||||||||||
4J42 |
0.05 |
0.020 |
0.020 |
0.80 |
0.30 |
0.10 |
1.0 |
41.5~42.5 |
balance |
tensile strength for strips |
|
status |
tensile strength /MPa |
soft |
<590 |
hard |
>820 |
hardness of strip in deep punching status |
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deep punching |
thickness/mm |
Hardness HV |
Fe-Ni-Cr |
≤190 |
|
Fe-Ni |
>2.5 |
≤190 |
≤2.5 |
≤165 |
heat treating regime and coefficient of linear expansion |
|||||
Grade |
Heat treatment on samples |
a/(10-6/K) |
|||
20-300°C |
20~400% |
20-450°C |
|||
4J42 |
Heat the sample to (900±20)°C in hydrogen atmosphere, keep the temperature for one hour, cool to below 200°C at the speed ≤5°C/min then discharge |
4.0~5.0 |
6.5~7.5 |
||
6.5~7.2 |
6.5~7.2 |
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9.2~10.0 |
9.2~9.9 |
coefficient of expansion |
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Grade |
Average coefficient of expansion a/(10-6/K) |
|||||||
20~100°C |
20~200°C |
20~300°C |
20~400°C |
20~450°C |
20~500°C |
20~600°C |
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4J42 |
5.6 |
4.9 |
4.8 |
5.9 |
6.9 |
7.8 |
9.2 |