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Marsh Nickel Alloys, a renowned manufacturer and supplier based in Canberra, Australia, specializes in supplying premium quality nickel alloys and related products to various industries worldwide Their wide range of products includes Invar-42 bars and high-performance alloys is, known for its superior thermal expansion stability is, which makes it ideal for precision machinery, electronic devices and aerospace applications With a commitment to innovation, quality and customer satisfaction,Marsh Nickel Alloy is a trusted name for reliable and robust steel solutions to meet the needs of the industry.
Marsh Nickel Alloys is a proud Canberra-based manufacturer and supplier that specializes in **Invar 42 bars**. We focus on delivering high-precision, low-expansion alloy bar products that meet the rigorous demands of both industrial and scientific applications. Thanks to our cutting-edge metallurgy, strict quality control, and commitment to international standards, every Invar 42 bar we produce boasts exceptional dimensional stability, uniformity, and material integrity. We serve a variety of sectors, including aerospace, precision tooling, electronics, and scientific instrumentation, and we’ve built a reputation in Canberra for our reliable supply, timely delivery, and expertise in controlled-expansion alloys like Invar 42.
| Standards : | ASTM F30, ASME SF30 |
| Dimensions : | EN, DIN, JIS, ASTM, BS, ASME, AISI |
| Wire : | Thickness starting from 0.05mm |
| Round bar size : | Diameter: 3-~800mm |
| Hex Bar size : | 2-100mm A/F |
| Flat bar size : | Thickness: 2 -100mm / Width: 10 to 500mm |
| Square bar size : | 4 to 100mm |
| Rectangular Bars Size : | 33 x 30mm to 295 x 1066mm |
| Hollow Bar : | 32mm OD x 16mm ID to 250mm OD x 200mm ID |
| Tolerance : | H8, H9, H10, H11, H12, H13K9, K10, K11, K12 or as per clients’ requirements |
| Finish : | Black, Bright Polished, Rough Turned, NO.4 Finish, Matt Finish, BA Finish |
| 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 |
Invar 42 is a nickel-iron alloy that contains about **42% nickel**, with the rest made up of iron and trace amounts of carbon, manganese, silicon, phosphorus, and sulfur. Its mechanical properties are impressive, featuring a yield strength of around **250-300 MPa**, a tensile strength of at least **500 MPa**, and an elongation typically greater than **30%**, with Brinell hardness reaching up to ~130 HB in the annealed state. One of its standout features is its very low coefficient of thermal expansion across the range of ~20-300 °C, which is crucial for maintaining dimensional stability as temperatures fluctuate.
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At Marsh Nickel Alloys, our Invar 42 bars are essential in applications where precise control over thermal expansion is a must. You’ll find them in tooling and molds for composite materials, precision gauges and jigs, glass-to-metal and ceramic-to-metal sealing components, as well as in satellite and aerospace structural parts. They’re also invaluable in instrumentation where minimizing dimensional drift is critical. Their stability makes them ideal for electronic device housings, thermostat rods, and any situation where materials experience temperature cycles but need to maintain exact tolerances.
