Semih Metals, located in Istanbul, Turkey, stands out as a top manufacturer and supplier of Invar 36 Bars and Rods, providing high-quality solutions for industries that require dimensional stability across varying temperatures. Invar 36, often referred to as Alloy 36, is an iron-nickel alloy known for its remarkably low coefficient of thermal expansion, making it perfect for applications that demand precision and stability. Semih Metals is committed to strict quality control and follows international standards, offering Invar 36 Bars and Rods in a range of dimensions and grades. With a reputation for reliability, durability, and a global presence, the company has earned its place as a trusted partner in advanced engineering sectors.
Invar 36 Bars and Rods are primarily made up of 36% nickel and the rest iron, along with trace amounts of carbon, manganese, and silicon. This carefully crafted composition gives it the unique characteristic of near-zero thermal expansion, particularly in the temperature range of –100 °C to +200 °C. On the mechanical side, Invar 36 boasts a tensile strength of around 490–690 MPa, a yield strength close to 240 MPa, and a hardness between 130–160 HB. While it may be softer than high-strength steels, the alloy provides excellent toughness, ductility, and long-term stability, making it essential for precision engineering.
| 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, Invar 36 bar and rod can be welded, but it requires special care due to its low expansion properties. Proper welding techniques, such as TIG or MIG, are recommended.
Yes, specific welding consumables for Invar 36 bar and rod include Invar 36 electrodes, TIG rods, and MIG wires. These materials ensure proper fusion and minimize thermal expansion issues during welding.
Invar 36 rod, primarily composed of iron and nickel, is not highly susceptible to galvanic corrosion. However, when exposed to more noble metals in corrosive environments, it can experience some galvanic effects.
Invar 36 Bars and Rods find extensive use in industries where maintaining dimensional accuracy during thermal fluctuations is crucial. They are widely utilized in aerospace, defense, and electronics for precision instruments, optical systems, and scientific equipment. Additionally, Invar 36 plays a role in manufacturing measuring devices, LNG storage tanks, satellite components, and telecommunications gear. Its unparalleled stability makes it a valuable asset in the oil and gas industry, cryogenic applications, and high-precision tooling. Thanks to its ability to minimize expansion, Invar 36 continues to be the go-to material for industries that prioritize long-term reliability and accuracy.
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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