Semih Metals stands out as a top-notch manufacturer and supplier located in Istanbul, Turkey, with a focus on high-performance metal alloys like Invar 42 Bar and Rod. With years of experience in the metallurgical field, Semih Metals is dedicated to providing precision-engineered materials that meet the rigorous demands of industries such as aerospace, electronics, and cryogenics. The company prides itself on its commitment to quality, innovation, and customer satisfaction, offering both standard and custom specifications of Invar 42 products to clients around the globe. Thanks to cutting-edge manufacturing techniques and strict quality control measures, Semih Metals has built a solid reputation as a reliable source for high-quality Invar 42 solutions.
Invar 42, or UNS K94100, is an iron-nickel alloy that contains about 41–43% nickel, with the remainder being iron, along with small amounts of carbon, manganese, and silicon. It’s well-known for its remarkably low coefficient of thermal expansion. In terms of mechanical properties, Invar 42 boasts a tensile strength of roughly 450–700 MPa, a yield strength of about 275 MPa, and an elongation range of 30–45%, depending on its temper and treatment. This alloy maintains excellent dimensional stability over a wide temperature range, making it perfect for precision applications.
ASTM B211/ASME SB211 – Specification for Aluminum and Aluminum-Alloy Rolled or Cold Finished Bar, Rod
ASTM B221/ASME SB221 – Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods
ASTM B565/ASME SB565 – Test Method for Shear Testing of Aluminum and Aluminum-Alloy Rivets and Cold-Heading Rods
ASTM B316/ASME SB316 – Standard Specification for Aluminum and Aluminum-Alloy Rivet and Cold-Heading bars and Rods
AMS 4102/ISO Al99.0Cu – Standard Specification for Aluminum and Aluminum-Alloy Cold / Hot Rolled Bars, Rods
| Element | % Present |
| Al | 96 to 98.5 |
| Si | 0.7 to 1.3 |
| Mg | 0.4 to 0.8 |
| Mn | 0.4 to 0.8 |
| Fe | 0 to 0.5 |
| Zn | 0 to 0.2 |
| Ti | 0 to 0.2 |
| Cu | 0 to 0.1 |
| Others (Total) | 0.0 – 0.15 |
| Other (Each) | 0.0 – 0.05 |
| Temper | Tensile | Hardness | ||||
| Ultimate | Yield | Elongation | Brinell | |||
| KSI | MPA | KSI | MPA | % | ||
| T6, T651 | 45 | 310 | 21 | 145 | 25 | 65 |
Yes, aluminum bars are corrosion-resistant due to the formation of a natural oxide layer on the surface, which protects them from rust and deterioration, especially in various environmental conditions.
Yes, aluminum rods can be customized in size and length according to specific requirements. Manufacturers can cut, shape, and tailor the rods to meet precise specifications for various applications.
Aluminium bars perform poorly in high-temperature environments, as they lose strength and can soften at temperatures above 150-200°C. They are prone to oxidation and are unsuitable for extreme heat applications.
Invar 42 Bar and Rod are commonly utilized in industries where maintaining dimensional stability and minimizing thermal expansion are crucial. You’ll find it in electronic components, telecommunications, aerospace instrumentation, precision measurement devices, and cryogenic engineering. The alloy’s stability across varying temperatures makes it ideal for lead frames, glass-to-metal seals, and shadow masks in CRTs. It’s also used in tooling for aerospace composite fabrication and high-precision instruments like gyroscopes and laser components. Invar 42 is particularly popular in environments where thermal fluctuations could jeopardize structural integrity or precise alignments, ensuring long-lasting 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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