Szczegóły Produktu
Miejsce pochodzenia: Szanghaj, Chiny
Nazwa handlowa: TANKII
Orzecznictwo: ISO9001, SGS
Numer modelu: inwar36
Warunki płatności i wysyłki
Minimalne zamówienie: 10 kg
Cena: negocjowalne
Szczegóły pakowania: drewniana skrzynka
Czas dostawy: 7-20 dni
Zasady płatności: Akredytywa, T/T, Western Union
Możliwość Supply: 100 ton miesięcznie
Nr modelu: |
Inwar 36 |
OD: |
0,20 mm Min |
WT: |
0.015 mm |
Długość: |
0,20 mm Min. |
Kształt: |
wężownica; Rurka kapilarna Rury bez szwu |
Powierzchnia: |
Jasna powierzchnia |
Próbka: |
zaakceptowane małe zamówienie |
Nr modelu: |
Inwar 36 |
OD: |
0,20 mm Min |
WT: |
0.015 mm |
Długość: |
0,20 mm Min. |
Kształt: |
wężownica; Rurka kapilarna Rury bez szwu |
Powierzchnia: |
Jasna powierzchnia |
Próbka: |
zaakceptowane małe zamówienie |
4J36 (Invar) is used where high dimensional stability is required, such as precision instruments, clocks, seismic creep gauges, television shadow-mask frames, valves in motors, and antimagnetic watches. In land surveying, when first-order (high-precision) elevation leveling is to be performed, the Level staff (leveling rod) used is made of Invar, instead of wood, fiberglass, or other metals. Invar struts were used in some pistons to limit their thermal expansion inside their cylinders.
4J36 use oxyacetylene welding, electric arc welding, welding and other welding methods. Since the coefficient of expansion and chemical composition of the alloy is related should be avoided due to welding causes a change in the alloy composition, it is preferable to use Argon arc welding welding filler metals preferably contains 0.5% to 1.5% titanium, in order to reduce weld porosity and crack.
Normal composition%
| Ni | 35~37.0 | Fe | Bal. | Co | - | Si | ≤0.3 |
| Mo | - | Cu | - | Cr | - | Mn | 0.2~0.6 |
| C | ≤0.05 | P | ≤0.02 | S | ≤0.02 |
Coefficient of expansion
| θ/ºC | α1/10-6ºC-1 | θ/ºC | α1/10-6ºC-1 |
| 20~-60 | 1.8 | 20~250 | 3.6 |
| 20~-40 | 1.8 | 20~300 | 5.2 |
| 20~-20 | 1.6 | 20~350 | 6.5 |
| 20~-0 | 1.6 | 20~400 | 7.8 |
| 20~50 | 1.1 | 20~450 | 8.9 |
| 20~100 | 1.4 | 20~500 | 9.7 |
| 20~150 | 1.9 | 20~550 | 10.4 |
| 20~200 | 2.5 | 20~600 | 11.0 |
| The heat treatment process | |
| Annealing for stress relief | Heated to 530~550ºC and hold 1~2 h. Cold down |
| annealing | In order to eliminate hardening, which be bring out in cold-rolled, cold drawing process. Annealing needs heated to 830~880ºC in vacuum,hold 30 min. |
| The stabilization process |
|
| Precautions |
|
Typical Physical properties
| Density (g/cm3) | 8.1 |
| Electrical resistivity at 20ºC(OMmm2/m) | 0.78 |
| Temperature factor of resistivity(20ºC~200ºC)X10-6/ºC | 3.7~3.9 |
| Thermal conductivity, λ/ W/(m*ºC) | 11 |
| Curie point Tc/ ºC | 230 |
| Elastic Modulus, E/ Gpa | 144 |
