ASTM E328 Steel Strand Tensile Stress Relaxation Testing Machine (WSC-200/300/400/500)
Product Description
Introduction
HUALONG WSC Series is used to determine stress-relaxation of metal, such as pre-stressed concrete strand, pre-stressed concrete bar, steel rope and so on., the specimen is deformed a given amount and decrease in stress is recorded over prolonged period of exposure at constant elevated temperature.
Standard
EN10391:2003 stress relaxation test method of metal and ASTM E328- 02(2008) Standard Test Methods for Stress Relaxation Tests for Materials and Structures
Features
1. Automatic draw the real time curve of residual stress versus time, temperature versus time and relaxation rate versus time.
2. Automatic calculate 1000 hours stress relaxation rate of the specimen. The calculation method has double logarithm option and single logarithm option and calculating data has entire data option and data at certain time option.
3. High precision temperature recorder attached to record the influence ofroom temperature variations in the force curve.
4. Servo-controlled drive system ensures the high precision load/displacement close-loop control, besides, it has a very low noise during the whole test.
5. Loading speed could be set arbitrarily.
6. Constant load and constant displacement control could beselected.
7. Automatically calculate stress relaxation properties of the specimen and print complete test diagram.
Product Parameters
| Model |
|
WSC-200 |
WSC-300 |
WSC-400 |
WSC-500 |
| Load Capacity |
kN |
200 |
300 |
400 |
500 |
| Measuring Range |
kN |
8-200 |
12-300 |
16-400 |
20-500 |
| Load Resolution |
N |
7 |
10 |
12 |
15 |
| Load Accuracy |
% |
±1% |
| Creep of load cell |
% |
30 minutes<=0.02% |
| Position Accuracy |
% |
±0.5% |
| Horizontal Span |
mm |
1850 |
| Ball Screw Stroke |
mm |
100 |
| Loading Speed |
N/S |
100-5000 |
| Temperature Accuracy |
ª |
Temperature sensor resolution:0.1 ª
Temperature sensor accuracy:±0.3 ª |
| |
| Specimen Dimensions |
| PC Strand |
mm |
Φ12.7~Φ15.24 |
Φ12.7~Φ15.24 |
Φ12.7~Φ15.24 |
Φ15.2~Φ21.8 |
| PC wire |
mm |
Φ3~Φ9 |
Φ3~Φ9 |
Φ3~Φ9 |
Φ3~Φ9 |
| PC Bar |
mm |
Φ7~Φ18 |
Φ7~Φ18 |
Φ7~Φ18 |
Φ7~Φ18 |
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