Invar Bar and Rod

Aung Metals stands out as a top-notch manufacturer and supplier of Invar Bars and Rods, proudly based in Naypyidaw, Myanmar. They specialize in providing high-quality nickel-iron alloy solutions tailored for precision engineering and various industrial applications. The company is committed to using cutting-edge manufacturing techniques, maintaining strict quality control, and adhering to international standards, ensuring that their materials are not only reliable but also perform exceptionally well. Invar Bars and Rods are particularly famous for their incredibly low coefficient of thermal expansion, outstanding dimensional stability, and solid mechanical strength, making them perfect for applications where temperature sensitivity and precision are crucial. With a focus on timely delivery, competitive pricing, and dedicated customer support, Aung Metals caters to industries like aerospace, electronics, scientific research, and high-precision engineering with their superior Invar products.

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Invar Round Bars

Invar Rectangular Bars

Invar Square Rods

What is Invar 36 Bar and Rods?

These Invar Bars and Rods are primarily made up of nickel and iron, typically containing around 36% nickel, which gives them that remarkable low coefficient of thermal expansion and excellent dimensional stability. They showcase moderate hardness, good tensile strength, and dependable mechanical performance across various temperatures. Invar is known for maintaining its structural integrity even under thermal cycling, which helps to minimize any expansion or contraction in critical applications. Thanks to its unique composition, it ensures precise tolerances, thermal stability, and long-lasting reliability, making it an excellent choice for components that demand high accuracy and minimal deformation when temperatures fluctuate.

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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 their place in industries that need materials with minimal thermal expansion and high dimensional accuracy. They’re frequently used in aerospace for precision instruments, structural components, and optical assemblies. In the electronics sector, Invar is utilized for semiconductor fixtures, circuit components, and precision measuring devices. This alloy is also ideal for scientific instruments, optical benches, and mechanical parts that are sensitive to temperature changes. Its remarkable thermal stability, paired with sufficient mechanical strength, makes it a go-to choice for a variety of demanding applications.

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