Thank You for Your Attention on Beiye!
BYP12 (4J29) has a certain linear expansion coefficient from -60℃ to 400℃. Similar alloy's names in different trademark systems:
Beiye | China Standard | America | Germany | France | Japan |
BYP12 | 4J29 | AMS7727A AMS7728E Class1 | Ni29Co18 | Fe-Ni29Co17 | Fe-Ni-Co sealing alloy |
Sealing alloys for hard glasses
Transmitting tube
Oscillation tube
Ignitron
Transistor
Relay shell
| Ni | 28.5~29.5 | Fe | bal. |
Co | 16.8~17.8 |
| 25℃-400℃ | 4.6~5.2 |
25℃-450℃ | 5.1~5.5 |
Tensile Strength | ||||
Soft | 1/4Hard | 1/2Hard | 3/4Hard | Hard |
<570 MPa (82.7 ksi) | 520～630 MPa (75.4~91.4 ksi) | 590～700 MPa (85.6~101.5 ksi) | 600～770 MPa (87.0~111.7 ksi) | >700 MPa (>101.5ksi) |
| Hardness | Thickness | Deep-drawing State | ||
>0.2~2.5mm | ≤165HV | |||
>2.5mm | ≤170HV | |||
Gain Size | Deep-drawing State: ≥Level 7 | |||
| Density | 8.17 g/cm3 (0.298 lb/in3) |
| Resistivity | 46 µΩ•cm |
Thermal conduction | 19 W/K |
Elastic modulus | 134 Gpa |
