KX 4J47 Corrosion Resistant Alloy Light Rod On Expansion Alloy
Product Description and Application
4J47 is also known as Alloy 47
4J47 has an expansion coefficient near soft glass in the temperature scale of 20 ~ 400℃, which is used for matching and sealing with the corresponding soft glass. This kind of alloy contains chromium that the alloy surface will form a very dense oxide film after oxidation treatment, then strong binding with matrix and good wettability with soft glass. Therefore, high strength sealing surfaces can be obtained, which is an important sealing structure data 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 | Cr | Ni | Fe |
| 4J47 | ≤0.05 | ≤0.02 | ≤0.02 | ≤0.4 | ≤0.3 | - | 0.8～1.4 | 46.8～47.8 | Rem |
- Product Average Coefficient of Linear Expansion
| Alloy Grade | Sample Heat Treatment Institution |
Average linear expansion coefficient α(10-6/ K) |
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| 20-300 ℃ | 20-400 ℃ | 20-450℃ | ||
| 4J47 | It is heated to 1100±20 ℃ in vacuum or hydrogen atmosphere, held for 15min and cooled to less than 200 oC at a speed of no more than 5 ℃/ min | —— | 8.1-8.7 | —— |
- Product Typical Coefficient of Linear Expansion
| Alloy Grade |
Average Linear Expansion Coefficient α(10-6/ K) |
||||||
| 20-100℃ | 20-200℃ | 20-300℃ | 20-400℃ | 20-450℃ | 20-500℃ | 20-600℃ | |
| 4J47 | 8.1 | 8.6 | 8.3 | 8.3 | —— | 9.1 | 10 |
- 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 |
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