Computer Controlled SC W300 Stress Relaxation Testing Machine

Description The SC-W300 is a high-precision, computer-controlled tensile stress relaxation tester for metal materials (steel bars, PC strands, wires) and fasteners at room temperature. It accurately measures long-term stress relaxation behavior under constant strain, fully compliant with: GB/T 10120-2013 – Tensile Stress Relaxation of Metallic Materials ASTM E328-2013 – Stress Relaxation Tests for Materials and Structures Ideal for steel mills, prestressed concrete, bridge cable, and fastener R&D. Grade 0.5 accuracy – no range switching Ultra-low sensor creep: ≤0.02% FS in 30 min Imported servo motor preload ball screw – smooth, backlash-free Real-time dual monitoring: Force Deformation Auto data logging (relaxation curve, residual stress, relaxation rate) Windows software – test setup, live graph, report export (PDF/Excel) Specialized PC strand grips (Φ12.7 / 15.2 / 18 mm) Laser printer included for instant test reports Parameter Specification Model SC-W300 Type Tensile Stress Relaxation Testing Machine Maximum Load 300 kN Accuracy Grade 0.5 Force Range 2% – 100% FS (no range switching) Force Indication Error ±0.5% Force Resolution 1/500,000 FS Load Sensor Creep (30 min) ≤0.02% FS Deformation Range 0 – 15 mm (recommended L₀ = 1000 mm) Deformation Error ±0.5% Displacement Resolution 0.01 μm Displacement Error ±0.5% Loading Head Speed 0.001 – 20 mm/min Force Rate Control 0.1 – 10 kN/s Speed Control Error ±0.5% Temperature Resolution 0.1°C Effective Stroke 100 mm Max Distance Between Grips 1400 mm Sample Diameter (PC Strand) Φ12.7, Φ15.2, Φ18 mm (length ≥2.4 m) Power 1.5 kW Power Supply AC 220V ±10%, 50Hz Weight 1000 kg Dimensions (L×W×H) 2480 × 560 × 1100 mm Item Qty Main Frame (with ball screw) 1 set Imported Servo Motor & Driver 1 set 300 kN High-Precision Load Cell 1 unit Relaxation Control System 1 set Deformation Measurement Device 1 set PC Strand Grips (Φ12.7 / 15.2 / 18 mm) 1 set each ASUS Industrial PC 1 unit HP Laser Printer (M54A) 1 unit Chinese Testing Software 1 set Tool Kit & Protective Cover 1 set Full Documentation (Manual, Calibration) 1 set