Our products conform to GB, AISI, ASTM, DIN, EN, JIS standard for stainlesss steel coil, sheet and plate.
┃ Material
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%)
|
Material |
Ni |
Fe |
Co |
Mn |
Si |
C |
Al |
|
Alloy 32-5 |
31.5~33.0 |
balance |
5.0 |
≤0.60 |
≤0.25 |
≤0.05 |
≤0.10 |
|
Material |
Mg |
Zr |
Ti |
Cr |
P |
S |
|
|
Alloy 32-5 |
≤0.10 |
≤0.10 |
≤0.10 |
≤0.25 |
≤0.015 |
≤0.015 |
|
┃ 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
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