Semih Metals, located in Istanbul, Turkey, is a reliable manufacturer and supplier of Invar Bars and Rods. They specialize in high-performance nickel-iron alloy products designed to minimize thermal expansion, ensure dimensional stability, and resist corrosion. Crafted with precision and rigorous quality control, these bars and rods boast an excellent surface finish, precise dimensions, and dependable mechanical properties. Semih Metals guarantees that its Invar Bars and Rods meet the stringent demands of industries like aerospace, precision instruments, electronics, and cryogenic engineering, where maintaining stable dimensions during temperature changes is crucial.
The composition of Invar Bars and Rods primarily includes iron (about 64%) and nickel (around 36%), with some trace elements added to enhance machinability and overall performance. This distinctive blend results in an alloy with an exceptionally low coefficient of thermal expansion, allowing it to maintain dimensional stability across a wide range of temperatures. In terms of mechanical properties, Invar provides good tensile strength, yield strength, toughness, and ductility, all while remaining stable during thermal cycling. Its unique combination of low thermal expansion and mechanical reliability makes it perfect for precision applications.
| Standards : | ASTM F1684, ASME SF1684 |
| 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 | Co |
| Invar 36 | 0.10 max | 0.06 max | 0.35 max | 0.025 max | Rem | 35-38 | 0.50 max | 0.025 max | 0.50 max | 1.0 max |
| Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| Psi – 71,000 , MPa – 490 | Psi – 35,000 , MPa – 240 | 42 % |
| STANDARD | WERKSTOFF NR. | UNS |
| Invar 36 | 1.3912 | K93600 |
Yes, for Invar bar welding, specialized consumables like Invar welding rods, Invar electrodes, or Ni-based filler metals such as ERNi-1 or ERNiCrMo-3 are commonly used to ensure optimal bonding and minimize thermal expansion issues.
Yes, Invar bar and rod can be welded, typically using TIG or MIG welding techniques. However, it requires careful control of heat to avoid distortion due to its low expansion properties.
Invar rods, primarily composed of iron and nickel, are generally resistant to galvanic corrosion. However, when paired with more reactive metals, they may experience corrosion if exposed to electrolyte solutions.
Invar Bars and Rods find extensive use in industries where precision and dimensional stability are paramount. They are commonly utilized in precision instruments, scientific equipment, aerospace components, cryogenic devices, and optical systems. Furthermore, they are essential in measurement tools, electronic assemblies, and structural components where minimizing thermal expansion is vital. Thanks to their outstanding thermal stability, strength, and corrosion resistance, Invar Bars and Rods deliver long-lasting performance in advanced engineering, scientific, and industrial applications.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Semih Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Istanbul, Turkey
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