Controlled Expansion Alloy Kovar 4J29 Alloy Round Bar and Rod Supplier
Controlled Expansion alloy
Controlled expansion alloy use to form a hermetic seal with glass or ceramic.e.g.vacuum tubes, lamps,power
tubes. Or application where a specific expansion must be met over a certain temperature range;e.g. Optoeletronics, optical and laser benches.
*Kovar alloy, ASTM F15, Nilo-K,UNS K94610 (FeNi29Co17), Chinese 4J29
Glass sealed and controlled expansion alloys ASTM F15; DIN 17745; S.E.W. 385;
Werkstoff Nr. 1.3981; AFNOR NF A54-301
*Alloy 46,UNS K94600,(Fe-46Ni), Chinese 4J46
*Alloy 27,ASTM F-256,UNS K92801,(Fe-28Cr), Chinese 4J28
*Invar alloy,ASTM F1684,UNS k93600 (FeNi36), Chinese 4J36
*Ceramvar alloy, ASTM F1466, (Fe-Ni27-Co25), Chinese 4J33/4J34
Chemical composition of Expansion alloy
Alloy |
Chemical composition % |
||||||||||||
C |
P |
S |
Mn |
Si |
Cu |
Cr |
Mo |
Ni |
Co |
Fe |
|||
≤ | |||||||||||||
|
4J29 Kovar |
0.03 |
0.020 |
0.020 |
0.5 |
0.30 |
0.20 |
0.20 |
0.20 |
28.5~29.5 |
16.8~17.8 |
Bal. |
||
4J44 |
0.03 |
0.020 |
0.020 |
0.5 |
0.30 |
0.20 |
0.20 |
0.20 |
34.2~35.2 |
8.50~9.50 |
Bal. |
||
4J46 |
0.05 |
0.02 |
0.02 |
0.4 |
0.3 |
3.0-4.0 |
-- |
-- |
-- |
5.0-6.0 |
Bal. |
||
4J28 |
0.12 |
0.02 |
0.02 |
1.0 |
0.7 |
-- |
27-29 |
-- |
≤0.5 |
-- |
-- |
||
4J36 Invar |
0.05 |
0.02 |
0.02 |
0.2-0.6 |
0.3 |
-- |
-- |
-- |
35-37 |
-- |
Bal. |
||
4J33 |
0.05 |
0.02 |
0.02 |
0.5 |
0.3 |
-- |
-- |
-- |
32.1-33.6 |
14-15.2 |
Bal. |
||
4J34 |
0.05 |
0.02 |
0.02 |
0.5 |
0.3 |
-- |
-- |
-- |
28.5-29.5 |
19.5-20.5 |
Bal. |
||
Note: We could do any other products with specified technical standard, say, ASTM,SAE,DIN,S.E.W.,JIS,ISO,
IEC,NF,BS.PLS contact us for more information: Tel: +86-29-33669103 or e-mail us at: webmaster@xagy.cn





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