Slow Strain Rate Tensile Testing Machine

Slow Strain Rate Stress Corrosion Testing Machine

Product Introduction: The Slow Strain Rate (SSRT) Stress Corrosion (SCC) Testing Machine is used to conduct corrosion slow strain tests on materials in corrosive environments. The optional test vessel provides experimental conditions in a medium environment, enabling testing from room temperature to high temperature, and from atmospheric pressure to high pressure. Equipped with a DCPD crack propagation measurement system and a loading unit for fatigue testing, it enables corrosion fatigue loading in corrosive environments, along with continuous crack propagation length and crack growth rate measurements. The standard configuration includes a slow loading system, which extrapolates material change characteristics over 1000 hours and longer through 100-hour experiments.

System Composition: This testing system consists of a tensile loading system, a corrosive environment container (test vessel), test fixtures, measurement and control system, testing software, computer, control cabinet, and other components. Expandable configurations include the DCPD crack measurement system, among others. Test fixtures: 1) Fixture material: 304 (to be determined); 2) Configured with 7/16" (M10) round specimen fixtures; 3) Configured with plate specimen fixtures; 4) Plate corrosion bending fixtures (optional).

Software Features

1) Supports metric units;

2) Supports functional navigation, allowing selection of corresponding test functions via the navigation interface;

3) Real-time display of force, displacement, and deformation values;

4) Real-time plotting of force-displacement curves, force-strain curves, force-time curves, strain-time curves, stress-strain curves, etc.;

5) Supports streamlined specimen control processes for easy expansion of testing methods;

6) Supports slow strain loading control;

9) Supports multi-program segment combination control, enabling comprehensive testing of various toughness and strength indicators of CT specimens in environmental systems in a single test;

10) Supports adjustment of control parameters during testing with immediate application;

11) Supports automatic and manual test logging;

12) Supports test resumption after interruption;

13) Supports test recovery after power loss;

14) Supports retention of collected data after power loss;

15) Supports long-term continuous testing for over 30 days;

16) Test data can be exported to EXCEL and ACCESS formats;

17) Supports equipment overload protection and various equipment and test safety protections.

Equipment Features

1) High-rigidity heavy-duty frame;

2) High-performance fully digital servo loading control system with high speed control accuracy;

3) Dual deformation sensors can be used for high-precision specimen deformation measurement;

4) Pressure balancing device;

5) Integrated STC800 measurement and control system for easy expansion and use;

Testing Functions

1) Capable of performing tensile tests like a standard electronic universal testing machine;

2) Constant load creep/stress corrosion testing;

3) Slow strain rate tensile testing, with a minimum tensile speed: 1x10⁻⁶ mm/s (test speed to be determined).

Technical Parameters

1) Maximum test force: 50 kN;

2) Test force range: 1% to 100% F.S.;

3) Relative error of test force indication: ±0.5%;

4) Maximum moving range of the loading head: 80 mm;

5) Loading head moving speed: 1 mm/s to 1x10⁻⁷ mm/s;

6) Loading head displacement measurement accuracy: ±0.5%;

7) Loading head displacement resolution: 0.05 µm;

8) Deformation measurement range: 0 to 20 mm;

9) Deformation measurement resolution: 1 µm;

10) Deformation measurement accuracy: ±0.5%;

11) Test vessel operating temperature: room temperature to 65°C;

12) Maximum operating pressure of the test vessel: 0.1 MPa (high pressure optional);

13) Test vessel volume: not less than 3 L.