Invar 42 is a unique alloy renowned for its low coefficient of thermal expansion (CTE), making it an ideal material for applications where dimensional stability under varying temperatures is critical. Invar 42 wires, specifically, are slender components crafted from this alloy, and they find application in a variety of industries due to their exceptional thermal characteristics.
The alloy, named "Invar" for its invariability in dimensions over a wide temperature range, is composed mainly of iron and nickel, with low levels of cobalt. The addition of nickel to the alloy is key to its thermal expansion properties. Invar 42, in particular, contains around 42% nickel, which further enhances its ability to resist expansion or contraction when exposed to temperature fluctuations. This property makes Invar 42 wires particularly valuable in precision instruments, scientific devices, and aerospace applications.
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The aerospace industry, in particular, relies on Invar 42 wires for applications such as thermal compensators in satellites and spacecraft. These wires help maintain the structural integrity of components that experience drastic temperature changes in space. Invar 42 wires are also used in various scientific instruments, where precision and stability are paramount. For instance, in laboratories, Invar 42 wires may be employed in the construction of experimental setups where maintaining accurate measurements is crucial.
Moreover, the electronics industry benefits from Invar 42 wires in the production of certain electronic components. As electronic devices become increasingly miniaturized and sensitive, the demand for materials with minimal thermal expansion becomes more pronounced. Invar 42 wires contribute to the reliability and performance of such components.
Despite its remarkable thermal stability, Invar 42 is not without its challenges. Machining and working with Invar alloys can be complex due to their hardness and brittleness. However, the benefits in terms of thermal stability often outweigh the challenges, especially in applications where precise dimensions are critical.
ASTM / ASME
ANSI/AWCI – 01 -1992 and ASTM E 2016-11 and RRW 360
Cut Lengths: 0.125" to 72"
No Limit on Spooled Lengths
0.0004" to 0.040"
10 microns to 1.0 mm
Other Sizes on Request
Tempers range from dead soft annealed to ultra spring temper
Filler Wire, Flat Wire, Coil Wire, Electrode Wire, Welding Wire, Wire mesh, Knitted Wire Mesh, Wire Rope, Wire Bobbin, Mig Wire, Tig Wire, Spring Wire, Square Wire
Spool, Reel, Coil, Bobbin, Carrier Custom packaging provided from as low as 1lb to 200lb tapered plastics
STANDARD | WERKSTOFF NR. | UNS |
Invar 42 | 1.3917 | K94100 |
Grade | C | Mn | Si | S | Fe | Ni | Cr | P | Mo | Cu | Mo |
Invar 42 | 0.1 max | 0.6 max | 0.35 max | 0.025 max | Balance | 35.0 – 37.0 | 0.5 max | 0.025 max | 0.5 max | 0.5 max | 0.5 max |
Yield Strength (0.2%Offset) | Tensile Strength | Elongation | Hardness |
Ksi – 36 , MPa – 248 | Ksi – 71 , MPa – 490 | 40 % | 40 |
Oil & Gas Industrires
Chemical Industries
Construction Industries
Offshore Pipelines & Pipe Works
Petrochemical Industry
Shipbuilding Industries
Hydraulic Applications
Piping Systems
Refining Industry
Food Processing Industry
Pulp & Paper Industry
Power Plant Industry
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