Invar Bar and Rod

Sahil Metals is a reputable manufacturer and supplier based in Riyadh, Saudi Arabia, specializing in top-notch Invar Bars and Rods. These products are crafted for industries that demand exceptional dimensional stability and minimal thermal expansion. Invar, a unique nickel–iron alloy, is famous for its nearly zero coefficient of thermal expansion, making it the go-to choice for precision engineering tasks. At Sahil Metals, we employ cutting-edge manufacturing techniques and rigorous quality control to guarantee consistency, reliability, and outstanding performance. Our Invar Bars and Rods find their way into various sectors, including aerospace, electronics, instrumentation, and industrial applications, where precision, durability, and long-lasting stability are crucial.

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Invar Round Bars

Invar Rectangular Bars

Invar Square Rods

What is Invar 36 Bar and Rods?

Invar typically consists of about 64% iron and 36% nickel, designed for remarkable thermal stability. It boasts a very low coefficient of thermal expansion (~1.2 × 10⁻⁶/°C between 20°C and 100°C) and a density of around 8.1 g/cm³. With a tensile strength of approximately 490 MPa and good ductility, Invar ensures excellent dimensional accuracy even with temperature fluctuations. It also provides high toughness, decent machinability, and sufficient corrosion resistance in controlled environments. These characteristics make Invar Bars and Rods perfect for precision components and high-performance industrial machinery.

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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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Invar Bar and Rod Uses

Invar Bars and Rods are widely utilized in precision instruments, optical devices, and measuring equipment due to their outstanding dimensional stability. They are the material of choice for aerospace and defense components, including satellite structures and cryogenic equipment, where minimal expansion is essential. Invar is also used in electronics, marine engineering, seismic instruments, and tooling for composite manufacturing. Industries depend on Invar for applications that require accuracy, reliability, and resistance to thermal distortion, making it an essential material for high-precision engineering and scientific instruments.

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