Invar Bar and Rod

Sabra Metals, a reputable manufacturer and supplier located in Amman, Jordan, specializes in high-quality Invar Bars and Rods tailored to meet the rigorous demands of precision-driven industries. Renowned for its outstanding dimensional stability, Invar is a go-to material in applications where minimal thermal expansion is crucial. At Sabra Metals, every Invar product is meticulously crafted with stringent quality control, cutting-edge processing techniques, and a commitment to global material standards. Their Invar Bars and Rods cater to sectors that require extreme accuracy, such as aerospace, instrumentation, and engineering, making Sabra Metals a dependable partner for clients who prioritize performance, consistency, and long-lasting material stability.

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Invar Round Bars

Invar Rectangular Bars

Invar Square Rods

What is Invar 36 Bar and Rods?

Invar Bars and Rods are primarily made of iron and nickel, typically containing about 36% nickel, which contributes to the alloy’s impressively low coefficient of thermal expansion. This distinctive composition enables Invar to maintain its dimensional stability even when temperatures fluctuate. On the mechanical side, Invar boasts moderate strength, good ductility, and excellent toughness, making it ideal for precision applications. It also offers solid fatigue resistance and can be cold-worked or machined with the right tools. These combined mechanical properties ensure that Invar Bars and Rods perform reliably in environments where exact measurements and minimal thermal distortion are essential.

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Invar Bar and Rod Specification

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

Chemical Compositions of Invar Bar

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

Invar Bar and Rod Mechanical Properties

Tensile Strength	Yield Strength (0.2%Offset)	Elongation
Psi – 71,000 , MPa – 490	Psi – 35,000 , MPa – 240	42 %

Equivalent Grades of Invar Bar

STANDARD	WERKSTOFF NR.	UNS
Invar 36	1.3912	K93600

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Invar Bar and Rod Types

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Frequently Asked Questions (FAQ)

Are there specific welding consumables for Invar Bar ?

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.

Can Invar Bar and Rod Be Welded?

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.

Are Invar Rod Susceptible To Galvanic Corrosion?

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 Bar and Rod Uses

Invar Bars and Rods find extensive use in industries where thermal stability is paramount. They’re commonly utilized in the production of precision instruments like measuring devices, clocks, seismic sensors, and optical systems. The aerospace and defense sectors rely on Invar for structural components, electronic housings, and tooling that must maintain their shape despite temperature changes. Additionally, Invar plays a crucial role in cryogenic engineering, laser systems, and scientific equipment that demands extremely low thermal expansion. It’s also employed in molds, composite tooling, and industrial assemblies where accuracy and dimensional integrity are vital across varying temperatures.

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