441 / 1.4509 Round Bars

Premium quality Invar 36 Round Bars manufactured from UNS K90600 / 1.3912 nickel-iron alloy, offering ultra-low thermal expansion, excellent dimensional stability, superior machinability, and reliable performance for aerospace, cryogenic, precision engineering, and electronic applications.

Availability: 5000 Kgs in stock

Delivery Lead Time: 2-3 Weeks





Invar 36 Round Bars are manufactured from premium nickel-iron alloy containing approximately 36% nickel, offering an exceptionally low coefficient of thermal expansion and outstanding dimensional stability. Manufactured in accordance with UNS K90600, UNS K90603, K93050, and Material No. 1.3912 specifications, these round bars are ideal for precision engineering, cryogenic equipment, aerospace tooling, measuring instruments, semiconductor equipment, optical devices, and scientific applications.

Stainless Steel Impex manufactures Invar 36 Round Bars using advanced production techniques and rigorous quality control procedures to ensure excellent mechanical strength, superior machinability, and precise dimensional accuracy. Available in round, flat, square, hexagonal, rectangular, hollow, and threaded profiles, our bars are supplied in hot rolled, cold drawn, forged, polished, and bright finishes to meet diverse industrial requirements. Every product is thoroughly inspected for chemical composition, mechanical properties, and dimensional tolerances before dispatch.

Grade: Invar 36 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 36 Round Bars Equivalent Grades

STANDARD: Invar 36
Material No: 1.3912
UNS: UNS-K90600 / K90603 / K-93050
EN Designation: Ni 36
Alloy: 36

Advantages

  • Extremely low coefficient of thermal expansion provides outstanding dimensional stability in precision and cryogenic applications.
  • Manufactured using premium nickel-iron alloy with strict dimensional tolerances, ensuring superior quality and reliable long-term performance.
  • Every batch undergoes comprehensive chemical, mechanical, dimensional, and ultrasonic testing, maintaining a defect rate below 1%.
  • Available in customized diameters, lengths, finishes, machining, cutting, polishing, and packaging according to customer requirements.

Product Details

441 / 1.4509 Round Bars


HS Code: 722220

Brand: Stainless Steel Impex

Standards: UNS K90600, UNS K90603, K93050, Material No. 1.3912, ASTM, AMS, EN Standards

Product Specifications

Manufactured from UNS K90600, UNS K90603, K93050 (Material No. 1.3912) Invar 36 alloy with bright, polished, black, hot rolled, cold drawn, forged, and centerless ground finishes.

Available in diameters from 3 mm to 800 mm with round, square, flat, hexagonal, rectangular, hollow, threaded, and custom profiles.

Produced according to international quality standards with complete material test certificates and supplied worldwide with fast delivery schedules.

Shipping & Packaging

Shipping & Packaging Image/Video Invar 36 Round Bars are securely packed using moisture-resistant wrapping, plastic end caps, wooden boxes, plywood cases, and export-grade pallets to prevent damage during storage and transportation. Every shipment is properly marked with grade, dimensions, heat number, and batch details for complete traceability. We ensure safe domestic and international delivery through reliable logistics partners to industries including refinery and petrochemical, nuclear power, offshore oil and gas, chemical processing, water treatment, food processing, aerospace, cryogenic engineering, electronics, instrumentation, precision engineering, and general manufacturing sectors.

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