Invar 42 (4J42) Plate

The Invar 42 has excellent controlled expansion quality and is primarily intended for controlled expansion and magnetic applications. Invar 42® is also very effective in magnetic applications. It can be hot formed, cold formed or machined. Nilo 42 has many of the properties of other Invar alloys. It is effective at extreme temperatures ranging from -32℃ to 275C,The Invar 42's coefficient of thermal expansion (CTE) is close to zero. This beneficial quality makes Nilo 42 one of the most effective alloys for manufacturing precision instruments. Invar 42 is widely considered to be the metal of choice for many glass-to-metal seal applications.

Common Trade Names:

Invar 42 , Alloy 42 , 4J42 , Nilo 42 , Glass Sealing 42 , Vacodil 42 , 42H , K94100 , W. Nr: 1.3917

Specifications：

ASTM F29 Wire /ASTM F30 Sheet, Strip, Rod, Bar, Tubing, Wire /B753 Sheet and Strip /SEW 385 Sheet, Strip, Bar /DIN 17745

Alloy 42 Characteristic

Transformer & capacitor bushings

Automotive & industrial lamps

Electronic tubes

Glass-to-metal applications

Ceramic-to-metal Applicati

Alloy 42 Physical Properties

Density: 0.291 lb/in³, 8.11 g/cm³

Thermal Conductivity: BTU-in/hr-ft2-°F (W/m•K): At 68 °F (20 °C): 72.8 (10.5)

Electrical Resistivity: ohm-cir-mil/ft, microhm-cm:
At 68 °F (20 °C): 367 (61)
At 212 °F (100 °C): 421 (70)
At 392 °F (200 °C): 523 (87)
At 572 °F (300 °C): 608 (101)
At 752 °F (400 °C): 662 (110)
At 932 °F (500 °C): 698 (116)
At 1112 °F (600 °C): 722 (120)

Mean Coefficient of Thermal Expansion: µin/in-°F (µm/m-°C): Annealed
68 – 572 °F (20 – 300 °C): 2.9 (5.3)
68 – 662 °F (20 – 350 °C): 3.0 (5.4)
68 – 752 °F (20 – 400 °C): 3.4 (6.2)
68 – 842 °F (20 – 450 °C): 3.9 (7.1)
68 – 932 °F (20 – 500 °C): 4.4 (8.0)

Modulus of Elasticity: ksi (MPa): 21.8 x 103 (150 x 103) in tension

Melting Range: 2615 °F (1435 °C)

Alloy 42 Chemical Composition

Alloy 42 The Typical Heat Treatment

Alloy 42 The Typical Mechanical Properties

Alloy 42 Available Shape

Alloy 42 Size Range

Bars & Rods & Foring Ring /Flanges

Sheet & Plate

Strip & Coil

Welding Wire &Spring wire

Seamless Tube & Welded Pipe

Alloy 42 ApplicationsI

It is used for tooling for aerospace composites, thermostat rods, for semiconductor lead frames, for ceramic-to-metal seals with alumina ceramics, in thermostatic bi-metal strip, and for various glass-to-metal sealing applications in microelectric components, cores of copper-clad wire for vacuum sealing into glass envelopes of electric lamp bulbs, radio valves, television tubes, and fluorescent lights.

FAQ

Q: How long is your delivery time?
A: Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples ? is it free or extra ?
A: Yes, we could offer the sample for free charge but do not pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=1000USD, 50% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shipment.or negotiable