KX 4J29 Corrosion Resistant Alloy Light Rod On Expansion Alloy
Product Description and Application
4J29 is also know as Ni29Co18, Nilo K
4J29 is a typical Fe-Ni-Co hard-glass sealing alloy, which has been used in aviation factories for a long time with stable performance. The alloy has a dense oxide film, which can be well infiltrated by glass. It is the main sealing structural material of electric vacuum devices and mainly used for the glass sealing of electric vacuum components such as transmitter tube, oscillation tube, ignition tube, magnetron, transistor, sealing plug, relay, lead line of integrated circuit, chassis, shell, bracket and etc.
Process Performance and Requirements
- Product Fusion Process
Vacuum Induction Furnace(VIM) and Electroslag Remelting Furnace(ESR)
- Product Chemical Composition
| Nilo K Chemical composition% | ||||||||||
| C | P | S | Mn | Si | Cu | Cr | Mo | Ni | Co | Fe |
| ≤0.03 | ≤0.02 | ≤0.02 | ≤0.5 | ≤0.3 | ≤0.2 | ≤0.2 | ≤0.2 | 28.5～29.5 | 16.8～17.8 | Rem |
- Product Physical Property
| Density | 8.36g /cm3 |
- Product Tensile Strength
| Status code | State | Tensile strength/MPa |
| R | Soft State | <585 |
| ¼I | ¼Hard State | 585～725 |
| ½I | ½Hard State | 655～795 |
| ¾I | ¾Hard State | 725～860 |
| I | Hard State’ | >860 |
- Product Heat Treatment Institution
| Grade | Sample Heat Treatment Institution | Average Coefficient of Linear Expansion α/(10-6/ K) | ||
| 20-300 ℃ | 20-400 ℃ | 20-450 ℃ | ||
| 4J29 | It was heated to 900±20 ℃ in hydrogen atmosphere, held for 1h, then reheated to 1100±20 ℃, held for 15min,then cooled to below 200 ℃ at a speed of no more than 5 ℃/ min | ---- | 4.6～5.2 | 5.1～5.5 |
- Product Average Coefficient of Linear Expansion
| Alloy | Average Linear Expansion Coefficient α/(10-6/ K) | |||||||
| Grade | 20～200 ℃ | 20～300 ℃ | 20～400 ℃ | 20～450 ℃ | 20～500 ℃ | 20～600 ℃ | 20～700 ℃ | 20～800 ℃ |
| 4J29 | 5.9 | 5.3 | 5.1 | 5.3 | 6.2 | 7.8 | 9.2 | 10.2 |
- Productive Process
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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