The alloy 42 is a nickel-iron alloy with a nickel content of 41%. The expansion coefficient is controllable and is therefore widely used in glass-to-metal sealing products. The expansion properties of the alloy are very close to 1075 glass and are therefore used for sealing applications of 0120 and 0010 The
Application
Alloy 42 is used for sealing applications such as tubes, automotive lights, industrial headlamps, transformers, capacitive insulating sleeves and other glass-metal and ceramic-metal applications.
chemical component%
| C | Mn | Si | Ni | Fe |
| 0.05 | 0.4 | 0.2 | 41 | Reste |
Heat treatment
Annealing - heated to 788 ° C, heat for 30 minutes / in (thickness), and then air cooled
Processing performance
forging
The forging temperature is 1177-1204 ° C. The holding time should not be too long to avoid the absorption of sulfur from the furnace atmosphere.
Cold upsetting
Alloy 42 can be swung or cold forging
Blanking and forming
Finishing is recommended for hardness Rockwell B90 alloy 42. Strip and small diameter round bar bending (acute angle), should use the hardness Rockwell B93 material.
Grinding and polishing
Please use silicon carbide grinding wheel, preferably flexible grinding wheel. The starting particle size for polishing is recommended for No. 80.
welding
Various conventional welding methods can be used. If an electrode is required, use electrode 42 of alloy.
plating
Alloy 42 can be plated or galvanized with black metal.
Doris
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