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For precision capillary tube of metal materials, we have been working on it for more than 30 years.
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Allloy 32-5Material
Alloy 32-5, Super Invar®32-5, UNS K93500, 64Fe32Ni5Co, 4J32
Overview
Alloy 32-5, a magnetic, austenitic, solid solution alloy containing iron, nickel and cobalt, is designed to provide minimum thermal expansion at room temperatures. This alloy also exhibits austenite stability to service temperatures at least -67°F (-55°C).
Characteristics
Alloy 32-5 is a ultra low expansion alloy consisting of 32% Nickel, 5% Cobalt, and balance Iron. Alloy 32-5 exhibits near zero thermal expansion at room temperatures (one half of Invar Alloy 36), as well as thermal expansion properties less than that of Invar Alloy in the 67 to 203°F (-55 to 95°C) temperature range.
Application
The minimal expansion of Alloy 32-5 over this range of temperatures, makes this alloy useful in many applications including structural components and substrates in instrument systems requiring precision measurements.
Chemical Composition (wt%)
Typical Mechanical Properties
|
Condition |
Tensile strength |
Yield strength |
Elongation |
||
|
N/mm² |
ksi |
N/mm² |
ksi |
%in 2” |
|
|
Annealed |
≥483 |
≥70 |
≥276 |
≥40 |
≥40 |
Hardness
Annealed: 75HRB max.
Cold worked: 90HRB min.
Heat Treatment
Annealing
Heat to 1450°F (790°C) and hold at heat 30 minutes per inch of thickness, then air cool. Heating to temperatures above 1000°F (538°C) relieves the presence of cold work stresses. The higher the temperature, the lower the annealed hardness.
Available Process
(1)Hot formed, annealed, descaled
(2)Cold worked and bright annealed
(3)Cold worked, aged, polished (MP, EP etc.)
Common Tests
Chemical composition
Tension
Hardness
Flaring
Flange
Flattening
Micro structure
Hydrostatic
NDT
Intergranular Corrosion
Surface condition
Shape and dimension
Positive Material Identification
Product Forms
|
Form |
Size range |
|
Capillary tube |
OD 0.08 ~ 6.0 mm WT 0.015 ~ 1.5 mm |
|
Thin wall & Ultra thin wall seamless tube |
OD6.0~80.0 mm WT 0.05~4.5 mm |
|
Micro ID and heavythick wall seamless tube |
OD3.0~50.0 mm ID0.30~5.0mm |
|
Precision conic seamless tube |
Bigger end: OD3.0 - 426.0mm Smaller end: OD2.5 - 346.0mm WT: 0.15 - 40.0mm |
|
HP/UHP BA+ tube EP tube |
OD 1.0 ~ 76 mm WT 0.10 ~ 10.0 mm |
|
Small caliber precision seamless tube |
OD6.0 ~89mm WT 0.50 ~9.0 mm |
|
Profiled seamless tube |
Build to drawing Build to specification |
|
Bourdon tube |
Y40, Y50, Y60, Y70, Y100, Y150 |
