4j29 (Kovar) , 4j32, 4j33, 4j34,Nickel Alloy Manufacturer
4j29 (Kovar) , 4j32, 4j33, 4j34,Nickel Alloy Manufacturer
Application:
The alloy is widely used as glass sealing for electronic vacuum devices, such as launching tube, oscillating tube, ignitron, magnetron, transistor, sealing plug, relay, leading wire of integrated circuit, chassis, shell, scaffold and so on.
Physical Constants:
Density:8.17g/cm³
Specific gravity (g/cm3): 8.36
Melting point(ºC): 1450
Melting heat(calorie/g): 64
Vapour pressure (μ M): 1× 10-6 (1000ºC)
Specific heat(calorie/g/ºC): 0.105 (0ºC)
0.155 (430ºC)
Heat conductivity(calorie/cm· Sec. · ºC): 0.0395 (30ºC)
0.0485(300ºC)
Curie temperature (ºC): 435
γ α Phase-transition temperature(ºC): Below -80
Electrical performance:
Resistivity (μ Ω -mm): 49 (25ºC)
We offer rods of various shapes, please check our catalogue:
| Varieties | Steel type Specifications mm |
Precision alloy |
Resistance Alloys for electrical heating | Super alloy | Welding wire | Corrosion resistant alloy |
|
| Rods | hot rolling rods | Φ8~38mm | available | available | available | ||
| Cold-drawn rods | ≤50mm | available | available | available | |||
| Forged rods | Φ38~350mm | available | available | available | |||
| Wires | Round wires | Φ0.3~8mm | available | available | available | available | available |
| Non-circle wires | Negotiation | available | available | available | |||
| Strips | Cold rolling | 0.15~4×200mm | available | available | available | available | |
| Hot rolling | 4~22×200mm | available | available | available | available | ||
| Plates | Cold rolling | 0.5~4×1000×2000mm | available | available | available | ||
| Hot rolling | 4~22×1000×2000mm | available | available | available | |||
| tubes | Φ4~63×0.5~5mm | available | available | ||||
| Executive standard: GB, GJB, HB, YB, ASTM, AMSE, negotiation and so on. | |||||||
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