Super Invar 32-5 Round Bars are premium low thermal expansion alloy bars manufactured from UNS K93500 material for applications requiring exceptional dimensional stability and precision. Composed primarily of nickel, cobalt, and iron, Super Invar 32-5 offers an extremely low coefficient of thermal expansion while maintaining excellent strength, machinability, and stability over a wide temperature range. These bars are widely used in aerospace, precision instruments, optical systems, laser equipment, semiconductor manufacturing, metrology, and defense industries. Available in round, flat, square, rectangular, hexagonal, and hollow bar forms, our Super Invar 32-5 Round Bars are precision manufactured to meet stringent international quality standards.
Grade: Super Invar 32-5 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
Super Invar 32-5 Round Bars Equivalent Grades
STANDARD: Super Invar 32-5
UNS: K93500
Advantages
- Manufactured using premium UNS K93500 alloy with an extremely low coefficient of thermal expansion for superior dimensional stability.
- Excellent mechanical strength, precision machining capability, and outstanding performance in temperature-sensitive applications compared to conventional alloys.
- Each batch undergoes stringent chemical analysis, dimensional inspection, mechanical testing, and surface quality verification, maintaining a defect rate below 1%.
- Each batch undergoes stringent chemical analysis, dimensional inspection, mechanical testing, and surface quality verification, maintaining a defect rate below 1%.

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