J type thermocouple wire JP/JN 0.35mm*19 twist
J type thermocouple wire JP/JN 0.35mm*19 twist
TYPE J (Iron vs Constantan) is used in vacuum, oxidizing, inert or reducing atmospheres. Iron element oxidizes rapidly at temperatures exceeding 538'C, and therefore heavier gauge wire is recommended for longer life at these temperatures
1. Chemical Composition
|
Material |
Chemical composition (%) |
||||
|
Ni |
Cu |
Si |
Iron |
Al |
|
|
JP(Iron) |
|
|
|
100 |
|
|
JN(Constantan) |
45 |
55 |
|
|
|
2. Physical properties and Mechanical properties
|
Material |
Density (g/cm3) |
Melting point (℃) |
Tensile Strength (Mpa) |
Volume resistivity (μΩ.cm) |
Elongation rate (%) |
|
JP(Iron) |
7.8 |
1402 |
>240 |
12.0(20℃) |
>20 |
|
JN(Constantan) |
8.8 |
1220 |
>390 |
49.0(20℃) |
>25 |
3. EMF Value range at different temperature
|
Material |
EMF value (μV) |
||||||||||
|
100℃ |
200℃ |
300℃ |
400℃ |
500℃ |
600℃ |
||||||
|
JP-JN |
5187~5351 |
10696~10862 |
16244~16410 |
21760~21936 |
27281~27505 |
32962~33242 |
|||||
|
EMF value Vs Pt (μV) |
|||||||||||
|
700℃ |
750℃ |
760℃ |
800℃ |
900℃ |
1000℃ |
||||||
|
38958~39306 |
42089~42473 |
42725~43113 |
|
|
|
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Hiedy Jiang
Ohmalloy Material Co., Ltd
Add: No. 1211, Mudanjiang Road, Baoshan district, Shanghai
TEL: +86-21-66796338 FAX: +86-21-66796339
Mob.: +86-186 4671 2628 Whatsapp/wechat: +86-186 4671 2628
Email: jiang@ohmalloy.com Web: www.ohmalloy.com
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