Invar 42 Round Bars are precision-manufactured from a controlled expansion nickel-iron alloy containing approximately 42% nickel, offering exceptional dimensional stability and a low coefficient of thermal expansion. Manufactured in accordance with UNS K94100 and Material No. 1.3917 specifications, these round bars are widely used in glass-to-metal sealing applications, aerospace tooling, electronics, optical instruments, transformers, semiconductor components, and precision engineering industries.
Stainless Steel Impex manufactures Invar 42 Round Bars using premium-grade raw materials and advanced production processes to ensure outstanding dimensional accuracy, superior mechanical strength, excellent corrosion resistance, and reliable performance. Our bars are available in round, flat, square, hexagonal, rectangular, hollow, and threaded profiles with hot rolled, cold drawn, forged, bright, polished, and centerless ground finishes. Every product undergoes rigorous quality inspections to ensure compliance with international quality standards before delivery.
Grade: Invar 42 Round Bar
Square bar size : 4 to 100mm
Hollow Bar : 32mm OD x 16mm ID to 250mm OD x 200mm ID)
Hex Bar size : 2-100mm A/F
Rectangles Size : 33 x 30mm to 295 x 1066mm
Flat bar size : Thickness: 2 -100mm, Width: 10 to 500mm
Round bar size : Diameter: 3-~800mm
Surface: Bright, Hot Rolled Pickled, Cold Drawn, Sand Blasting Finished, Polished, Hairline
Tolerance : H8, H9, H10, H11, H12, H13K9, K10, K11, K12 or as per clients’ requirements
Technique : Hot Rolled, Cold Drawn, Cold Rolled, Forged Round Bar, Rod
Condition : Hardened & tempered, annealed
Finish : Cold (bright) drawn, centreless ground, hot rolled, smooth turned, peeled, slit rolled edge, hot rolled annealed, Rough Turned, Bright, Polish, Grinding, Centreless Ground & Black
Processing : Bar cutting to 650mm
Invar 42 Round Bars Equivalent Grades
STANDARD: Invar 42
Material No: 1.3917
UNS: K94100
EN Designation: Ni 42
Alloy: 42
Advantages
- Low thermal expansion and excellent dimensional stability make Invar 42 Round Bars ideal for precision engineering and glass-to-metal sealing applications.
- Manufactured from premium nickel-iron alloy with strict dimensional tolerances for superior strength, accuracy, and long service life.
- Each batch undergoes chemical analysis, mechanical testing, dimensional inspection, ultrasonic testing, and surface quality checks, maintaining a defect rate below 1%.
- Available in customized diameters, lengths, machining, cutting, polishing, surface finishes, and export packaging to meet specific customer requirements.
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