Invar 36 Bars
Invar 36 Bars
Bango Alloy is a leading global supplier of nickel iron low expansion alloys including Invar® and Super Invar® in foil, strip, sheet, plate, wire, rod, bar, forged blocks and blanks. A wide variety of sizes are available from stock with immediate shipping. Bango Alloy also supplies additional low expansion and controlled expansion alloys Kovar, Alloy 42, Alloy 46 Alloy, 47/50, 48, 49, and Alloy 52.
We can supply soft magnetic Alloy 50, Hiperco 50 & 50A, Vim Var Core Iron. Bango Alloy Corporation is an ISO Certified Corporation and has been supplying the highest quality Invar® / Super Invar® for over 15 years.
General Properties
Nickel-Iron Alloy with a Very Low Coefficient of Thermal Expansion from Cryogenic Temperatures to 400°F (200°C)
SSC INVAR 36 nickel alloy plate (UNS K93603) is an austenitic nickel-iron alloy containing 36% nickel. It has an extremely low coefficient of thermal expansion from -418°F (-250°C) to 392°F (200°C). The alloy has good fatigue and mechanical properties at cryogenic temperatures. It exhibits moderately high strength along with good ductility and toughness. These properties along with good fabrication characteristics make SSC INVAR 36 nickel alloy plate ideal for applications requiring precise dimensional stability.
SC INVAR 36 nickel alloy plate can be hot and cold worked, machined, and formed. Fabrication processes are similar to austenitic stainless steels. The alloy can be welded using filler wire with expansion rates similar to those of the base metal.
SSC INVAR 36 nickel alloy plate resists corrosion in dry atmospheres at room temperature. In humid or moist atmospheres, corrosion can occur in the form of rust.

Bango Alloy is an Invar round bars supplier and stockist in China. Invar is an alloy of nickel and iron with a low coefficient of thermal expansion. It is, therefore, Invar metal bars are a good option for applications that need to be dimensionally stable and accurately measured. What makes Invar round bars unique from other materials is the fact that they can retain their shape and size despite high temperature fluctuations
A variety of sectors such as aerospace electronics and precision engineering commonly use invar round bars. The diverse grades of Invar bars that we offer have specific properties that cater to different uses. These are Invar 36, Invar 48, and Invar 42.
We provide Invar nickel alloy bars in a variety of sizes and shapes to match your individual project requirements. Our selection comprises round bars with diameters ranging from 3mm to 200mm, as well as other forms and specifications upon request.
Invar Round Bar Specification
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Standards |
ASTM F1684, ASME SF 1684 |
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Specifications |
DIN, EN, ASTM, JIS, ASME, BS, AISI |
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Invar Round Bars size |
Diameter: 3-~20mm |
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Invar Flat Bars size |
Thickness: 2 -100mm |
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Width: 10 to 500mm |
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Invar Angle Bars size |
3mm*20mm*20mm~12mm*100mm*100mm |
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Invar Channel Bars |
80 x 40mm to 150 x 75mm section; 5.0 to 6.0mm thickness |
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Invar Rectangular Bars Section |
3.0 to 12.0mm thickness |
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Invar Billet Size |
1/2 to 495mm Diameter |
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Invar Rectangle Bar Size |
33 x 30mm to 295 x 1066mm |
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Invar Hex Bar size |
2-100mm A/F |
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Invar Hollow Bars |
32mm OD x 16mm ID to 250mm OD x 200mm ID) |
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Diameter |
20mm, 30mm, 50mm, 80mm, 100mm, 150mm, 200mm, 500mm |
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Length |
1m-12m or as required |
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Tolerance |
H8, H9, H10, H11, H12, H13K9, K10, K11, K12 or as per clients’ requirements |
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Finish |
hot rolled annealed, peeled, Bright, hot-worked and cold-worked rod and bar, centreless ground, Centreless Ground and Black, Polish, Cold Rolled (CR), hot rolled ( R), smooth turned, Cold (bright) drawn, Grinding, slit rolled edge, Rough Turned. |
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Surface |
Hot Rolled Pickled, Bright, Sand Blasting Finished, Cold Drawn, Hairline,Polished |
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Trade names |
Invar ®, Pernifer ®, Nilo ® |
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Condition |
Hardened & tempered, annealed |
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Technique |
Cold Drawn, Hot Rolled, Forged Round Bars, Cold Rolled, Rod |
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Processing |
Bars cutting to 650mm |
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Form |
Rod, Round, Channel Bars, T-Bars, Flat Bars, Precision Ground Bars, Blocks, Square, Round Rod, Triangle, Hollow, Rectangle, Threaded, Hex (A/F), Profiles, Half Round Bars, Ingot, Billet, I/H Bars, Forging etc. |






