Negotiable
The date of payment from buyers deliver within days
Beijing
Long-term effective
2021-05-01 20:30
487
Company Profile
Unicorn Metal Technology Co., LtdBy certification [File Integrity]
Contact:younikeen(Mr.)
Email:
Telephone:
Phone:
Area:Beijing
Address:Beijing
Website:http://www.unicorntungsten.com/ http://younikeen.cinv-intr.com/
The character for tungsten wire:
The resistivity of tungsten wire is 5.3*10^-8. Tungsten has a high melting point, high resistivity, good strength and low vapor pressure. It is the best material for making incandescent filaments among all pure metals. But tungsten is hard and brittle and it is difficult to process. When the current passes through the tungsten wire and is heated to a certain temperature, the resistance value of the tungsten wire also increases to a certain value (generally, the resistance value of the metal wire increases with temperature). The resistance of this object should be 1370℃-2000℃ at normal temperature, but the resistance value will change when the length of the cross-sectional area of the tungsten wire changes.
The different chemical composition for tungsten wire:
Grade |
W1 |
W2 |
W content min,% |
≥99.95 |
≥99.92 |
Total impurity elements max,% |
≤0.05 |
≤0.08 |
Each element max,% |
≤0.01 |
≤0.01 |
The sag performance of φ0.4mm tungsten wire should meet the requirements of the following table:
Description |
WAL1 |
WAL2 |
Sagging value △h/mm |
≤4.0 |
≤8.0 |
Residual creep elongation /mm |
≤2 |
≤4.0 |
Tungsten wire tensile strength standard:
d μm |
Lower limit of ultimate tensile strength of 200mm wire segment |
|
N/mg |
N/mm2 |
|
5≤d≤12 |
0.9316 |
3578 |
12≤d≤26 |
0.8826 |
3389 |
26≤d≤36 |
0.8532 |
3276 |
36≤d≤40 |
0.7943 |
3050 |
40≤d≤45 |
0.7649 |
2937 |
45≤d≤55 |
0.7061 |
2711 |
55≤d≤112 |
0.6669 |
2561 |
112≤d≤140 |
0.6472 |
2485 |
140≤d≤200 |
0.5884 |
2260 |
Tungsten wire tensile test method
d μm |
≤30 |
>30~100 |
>100~200 |
Test speed mm/min |
50~70 |
80~100 |
130~150 |
http://www.unicorntungsten.com/
Indoor LCD Digital Signage Totem
price:Negotiable
Duplex Roller Chain
price:Negotiable
White Kraft Paper Shopping Bags
price:Negotiable
Engine Timing Tool for BMW Mini Cooper R55 R56 R57 R60 N12 N13 N14 N16 N18
price:Negotiable
CNC Stainless Steel Parts
price:Negotiable
High Precision Copper Strip
price:Negotiable