1.Very low coefficient of thermal expansion. 2.Have ISO9001:2008 Certificate 3.RoHs, test report 4. professional manufacture
Super Invar is also known as 32HK(Russia),Super-Invar,Super Nilvar, SI(Japan),Invar Superieur,Chinese 4J32,etc.
Used On:Super invar are suitable for environmental temperrature,make dimensional precision parts for instrumentation.
Specification:Sheet/Plate,Bar/Rod, Wire/Coil,Tube/Pipe/Capillary
Chemical Composition %
Steel No | Chemical Composition % | ||||||||
C | P | S | Mn | Si | Ni | Co | Cu | Fe | |
≤ | |||||||||
4J32 (Super Invar) | 0.05 | 0.020 | 0.020 | 0.200.60 | 0.20 | 31.5~33.0 | 3.20~4.20 | 0.40~0.80 | balance |
The Average Linear Expansion Coefficient:
Alloy Grades | Specimen heat treatment system | The average linear expansion coefficient α,10-6/ oC | |
20-100 oC | 20-300 oC | ||
Supper invar | To heat the semi-finishend products samples to 840±10,hold for 1h,and quench in the water. Machine the samples to finished samples.And heat At 315±10oC for 1h,furnace or air cool. | ≤1.0 | ----- |
The Average Linear Expansion Coefficient
Steel No. | α,10-6/ oC The Average Linear Expansion Coefficient | |||||
20-50oC | 20- 100oC | 20-200oC | 20-300 oC | 20-400 oC | 20-500 oC | |
4J32(Super Invar) | 0.7 | 0.8 | 1.4 |
4.3 | 7.2 |
9.3 |
super invar plate
