Steel Strand Stress Relaxation Testing Machine 500kn

Steel Strand Stress Relaxation Testing Machine 500kn

Computer-Controlled steel strand stress relaxation testing machine is used for tensile stress relaxation test of prestressed steel wire, steel strand, PC steel bar and metal materials, and for isothermal stress relaxation test, and the stress relaxation test cycle is more than or equal to 1000h. 

Maximum relaxation test force: 500KN
Accuracy level: 1
Relative error of indication: ± 1%
Effective measurement range: 1% - 100% f · s (full range without grading)
Test resolution: 1 / ± 500000  F.S (the resolution is unchanged in the whole process)
Relaxation load loading rate: 100 ~ 5000n / s, arbitrary setting
Deformation measurement range: 0.2% - 100% FS
Deformation measurement resolution: 0.001mm
Gauge distance of relaxation deformation of steel strand: 100-1400mm
Gauge length of steel strand: ≥ 60 times of nominal diameter of steel strand
Slack lead screw stroke: 0-200 mm
The adjustment rate of lead screw movement: 0.001-50 mm / min
Sample length: ≥ 2900 mm
Working time: ≥ 1000h
Steel strand relaxation load application: continuous loading, constant rate loading, constant load and strain keeping