Data sheet for Expansion Alloy Kovar (Ni29Co17)
Product Datasheet
Cross Reference |
Country | Grades | Type |
Russia(ГOCT) | 29HK /29KH-BИ |
Sealing Alloy |
USA(ASTM) | Kovar | |
Germany(DIN) | Vacon10/Vacon12/Sivar48/FeBiCo50/NiloK | |
Japan(JIS) | KV-1/KV-2/KV-3 | |
UK(BS) | Nilo K /Teleaseal | |
France(NF) | Dilver P0 / Dilver P1 | |
China(GB) | 4J29 |
Chemical Composition(%) |
C | P | S | Mn | Si | Mo | Cu | Cr | Ni | Co | Fe |
≤0.03 | ≤0.02 | ≤0.02 | ≤0.5 | ≤0.3 | ≤0.20 | ≤0.20 | ≤0.2 | 28.5-29.5 | 16.8-17.8 | Bal. |
Physical Properties |
Electrical Resisitivity | 294 | Ohm-cir mil/ft |
Density | 0.302 | Ib/cu in |
Melting Point | 2640 | ºF |
Modulus of elasticity | 20 | Psi x 10(6) |
Thermal Conductivity | 120 | Btu-in/ft2/hr/ºF |
Curie Temperature | 815 | ºF |
Tensile Strength of Wire |
Symbol | Status | Tensile Strength/MPa |
R | Annealed | <582 |
1/4 I | 1/4 Hard | 585-725 |
1/2 I | 1/2Hard | 655-795 |
3/4 I | 3/4 Hard | 725-865 |
I | Unannealed | >865 |
Tensile Strength of Strip |
Symbol | Status | Tensile Strength/MPa |
R | Annealed | <570 |
1/4 I | 1/4 Hard | 520-630 |
1/2 I | 1/2Hard | 590-770 |
3/4 I | 3/4 Hard | 600-770 |
I | Unannealed | >700 |
Hardness Of Deep Stamping Strip |
State | Thickness | Hardness,HV |
Deep Stamping | >2.5 | ≤170 |
≤2.5 | ≤165 |
Coefficient of Linear Expansion |
Heat Treatment of the Sample | 20-300℃ | 20-400℃ | 20-450℃ |
Heat to temperature of 900±20℃ in the hydrogen,hold for 1h;re-heat to 1100±20℃, hold for 15 min.;cooled to 200℃ at a rate less than 5℃/min |
.......... |
4.6-5.2 |
5.1-5.5 |
Average Coefficient of Linear Expansion |
20-200℃ | 20-300℃ | 20-400℃ | 20-450℃ | 20-500℃ | 20-600℃ | 20-700℃ | 20-800℃ |
5.9 | 5.3 | 5.1 | 5.3 | 6.2 | 7.8 | 9.2 | 10.2 |
Forms of supply |
Product Type | Products | Dimension/mm | Processes | Deliver |
Plate/Sheet | Plate/Sheet | 1.0-40.0 | Hot Rolling and Cold Rolling | Cold State Soft State |
Rod | Round Bar | 5.0-180 | Forging,hot rolled and cold rolled | Black, bright |
Coil/Strip | Coil/Strip | 0.05-1.5 | Cold Rolled,bright | Cold State Soft State |
Wire | Round Wire Flat Wire | 0.1-5.0 | Cold Drawn ,flat Rolled, bright annealed | Cold State Soft State |
Pipe | Pipe | OD0.1-ID129 | Cold Drawn bright annealed | Cold State Soft State |
Chemical composition,Physical and Mechanical properties will be engineered according to specific customer requirements.Therefore chemical composition,physical and mechanical properties might be different to values listed in this document.
Information about product characteristics or applicability of materials are shown only for informative purposes.
