1.Introduction

•  Used in mechanical property test of tensile stress relaxation at ambient temperature for metallic materials, such as strand, PC steel rod and steel wire;
• Satisfy with relative requirements of GB/T10120-1996 Metal Stress Relaxation Test Method and ASTM E328-2008 Test Method of Stress Relaxation for Material and Structure;
• standard strand，indented strand，compact strand，Epoxy resin steel strand，PC Strand，unbonded steel strand or monostrand，galvanized，，messenger wire)、拉线(guy wire，core wire or strength member，earth wire/ground wire，barrier cable，structure cable.
  Steel Bars for Prestressed Concrete,plain bar,helical grooved bar,helical ribbed bar,ribbed bar.
• ISO 6934-3:1991 Steel for prestressing of concrete-Part 3:Quenched and tempered wire
  

   2.Technical Specifications

• Rated load: 300/500/600kN;
• Measuring range of load: 1%-100% of full range;
• Load accuracy: ≤±1%;
• moving speed: 0.001-50mm/min; 
• loading rate: 100-5000N/S;
• deformation resolution: 0.001mm;
• tensile stroke: 0-200mm;
• specimen size: Φ9.50, Φ11.10, Φ12.70, Φ15.24, Φ18.00, Φ22.00
• Nominal tensile length: 800-1000mm;
• Power: 220VAC, 50Hz/2.0kW/4.5kW;
• Dimension (L*W*H): 2840*700*990mm/3600x760x1080mm