Stress Relaxation Testing Machine

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Application: This machine is used to do stress-relaxation test of steel strand, galvanized steel wire, indented wire etc metal materials. The host machine adopts horizontal structure, adjust work space by lead screw, and the transmission system is inside the machine base, the machine has very high stiffness, which guarantee the accuracy of test results. PC realizes variety of control modes, which include constant test force, constant displacement etc closed-loop control and test process control, all kinds of control modes can be switched without impact. The computer can calculate the test results of 1000 hours according to the test data not more than 200 hours, it can also do continuous test of 1000 hours. The computer real time displays test force and test curves, can save and print the test results, test curves and test report. 

Applied Standards:  ISO 15630-1, Steel for the reinforcement and prestressing of concrete -- Test methods  ISO 6934-4, Steel for the prestressing of concrete -- Part 4: Strand  ASTM A370, Standard Test Methods and Definitions for Mechanical Testing of Steel Products  ASTM A416 / A416M, Standard Specification for Low-Relaxation, Seven-Wire Steel Strand for Prestressed Concrete.  ASTM E328-13Test Methods for Stress Relaxation Tests for Materials and Structures