4J42 Corrosion Resistant Alloy Rod For Aerospace Composites
KX 4J42 Corrosion Resistant Alloy Light Rod On Expansion Alloy
Product Description and Application
4J42 Fe-Ni constant expansion alloy is a series of constant expansion alloys which can be matched with soft glass and ceramic with different expansion coefficient in a given temperature range by adjusting the nickel content. The expansion coefficient and Curie point of 4J42 Fe-Ni constant expansion alloy would increase with the nickel content increase . The alloy is a widely used sealing structure material in the electric vacuum industry, which is used to match the sealing with soft glass and ceramic on the production of electrical components, matching and sealing with corresponding soft glass in electric vacuum industry.
Process Performance and Requirements
- Product Fusion Process
Vacuum Induction Furnace(VIM) and Electroslag Remelting Furnace(ESR)
- Product Chemical Composition
| Alloy Grade | C | P | S | Mn | Si | Al | Co | Ni | Fe |
| 4J42 | ≤0.05 | ≤0.02 | ≤0.02 | ≤0.8 | ≤0.3 | ≤0.1 | ≤1 | 41.0～42.5 | Rem |
- Product Physical Property
| Density | 8.1g/cm3 |
| Melting Point | 1430℃ |
- Product Wire Tensile Strength
| State Code | State | Tensile strength/MPa |
| R | Soft | <590 |
| I | Hard | >820 |
- Product Strip Physical Property
| State Code | State | Tensile Strength/MPa |
| R | Soft | <570 |
| I | Hard | >700 |
- Product Average Linear Expansion Coefficient
| Alloy Grade | Sample Heat Treatment Institution |
Average Coefficient of Linear Expansion α(10-6/ K) |
||
| 20～ 300 oC | 20～ 400 oC | 20～ 450 oC | ||
| 4J42 | It is heated to 900±20 oC in hydrogen atmosphere, insulated lh, and cooled to less than 200 oC at a speed of no more than 5 oC/ min | 4.0～ 5.0 | ------ | 6.5～7.5 |
- Product Typical Average Linear Expansion Coefficient
| Alloy Grade |
Average Coefficient of Linear Expansion α(10-6/ K) |
||||||
| 20～100℃ | 20～200℃ | 20～300℃ | 20～400℃ | 20～450℃ | 20～500℃ | 20～600℃ | |
| 4J42 | 5.6 | 4.9 | 4.8 | 5.9 | 6.9 | 7.8 | 9.2 |
- Productive Process
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Professional Customization
| Cold-drawn Wire | ¢0.3~¢18mm(Delivery in rolls or trays) |
| Hot-Rolling Wire | ¢5.5~¢20mm(Delivery in rolls) |
| Strip | thickness 0.1~4.5*width 6~350mm(Supply in rolls or straight strips) |
| Smooth Forged Rod on a Lathe |
¢60~350mm,L800-2500mm |
| Hot-rolled Burnishing | ¢20~80mm,L1000-5000mm |
| Cold Drawn and Burnishing | ¢2.5~18mm,L1000-8000mm |
| Seamless Tube | ¢1~275mm,wall thickness 0.2~30,L1000-8000mm |
Get in Touch
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