Neil Metals stands out as a reliable manufacturer and supplier of precision-grade Invar Bars and Rods, proudly based in Kolkata, India. Invar, a unique nickel-iron alloy, is celebrated for its remarkably low coefficient of thermal expansion, making it a go-to choice for applications where maintaining dimensional stability is crucial. Neil Metals is committed to delivering top-notch Invar products that meet international standards, catering to industries like aerospace, electronics, instrumentation, and cryogenics. With a strong emphasis on quality, customization, and timely delivery, they ensure consistent performance and reliability. Their advanced manufacturing capabilities and skilled team make them a preferred partner for Invar Bars and Rods across various engineering sectors.
Invar Bars and Rods are made up of roughly 64% Iron and 36% Nickel, which gives this alloy its distinctive low thermal expansion properties. This material boasts a tensile strength ranging from 450 to 700 MPa and a yield strength of about 275 MPa, depending on the heat treatment process. Invar excels in maintaining excellent dimensional stability even with temperature changes, particularly around room temperature. It also offers good ductility and toughness, along with moderate machinability. Its minimal expansion makes Invar the perfect choice for high-precision components that need to keep their shape and size, regardless of temperature shifts.
| 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 |
Invar Bars and Rods find their primary applications in industries where controlling thermal expansion is essential for precision and dimensional stability. In the aerospace field, they are utilized for structural and instrumentation components in satellites and aircraft. In the realms of electronics and telecommunications, they serve as shadow masks, precision tooling, and hermetic seals. This material is also vital in scientific instruments, cryogenic engineering, and optical devices like telescopes and interferometers. Thanks to its unique thermal properties, Invar is indispensable for molds in composite manufacturing.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Neil Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Kolkata, India
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