| Test
Conditions: |
| Chain
Tested: |
NM720-CS,
6" Pitch
6 links, 3' total |
|
| |
| Testing
Procedure: |
| |
• |
NRG
NM-720S chain links were tested using six (6) links per test assembly
. The links are attached to the test fixture so load was applied to
the outside barrel. A 500 lb. preload was applied and then the Load
was applied at a constant crosshead speed of 0.2 inches per minute
and deflection reading were taken every 500 lbs until a minimum Working
Load (3100 lbs) was obtained. LOAD vs. ELONGATION graphs were plotted
for each test. |
| |
| Test
Results: |
| Testing
was witnessed and certified by an independent P.E. A chart of the
percent elongation is presented below. |
| TEST
NO. |
TEST
DATE |
%
ELONGATION (at W.L.) |
| 1 |
11/26/96 |
0.85% |
| 2 |
11/26/96 |
0.88% |
|
| |
| Test
Sample #2 (NRG NM-72-0) |
Tensile
load testing of 3.0" lengths (3') of 6" Plastic chain
Load test performed: 11/26/96 |
| LOAD |
DEFLECTION
GUAGE #1 |
DEFLECTION
GAUGE #2 |
AVG
DEFLECTION |
| 500 |
0.000 |
0.000 |
0.000 |
| 1000 |
0.068 |
0.071 |
0.070 |
| 1500 |
0.129 |
0.132 |
0.131 |
| 2000 |
0.184 |
0.190 |
0.187 |
| 2500 |
0.241 |
0.246 |
0.244 |
| 3000 |
0.297 |
0.303 |
0.300 |
| 3500 |
0.302 |
0.358 |
0.330 |
| 4000 |
0.411 |
0.417 |
0.414 |
| 4500 |
0.471 |
0.477 |
0.474 |
| 4985 |
0.471 |
0.477 |
0.474 |
|
 |
| |
| Test
Sample #3 (NRG NM-72-0) |
Tensile
load testing of 3.0" lengths (3') of 6" Plastic chain
Load test performed: 11/26/96 |
| LOAD |
DEFLECTION
GUAGE #1 |
DEFLECTION
GAUGE #2 |
AVG
DEFLECTION |
| 500 |
0.000 |
0.000 |
0.000 |
| 1000 |
0.069 |
0.067 |
0.068 |
| 1500 |
0.132 |
0.128 |
0.130 |
| 2000 |
0.192 |
0.188 |
0.190 |
| 2500 |
0.247 |
0.244 |
0.246 |
| 3000 |
0.306 |
0.302 |
0.304 |
| 3500 |
0.365 |
0.362 |
0.364 |
| 4000 |
0.425 |
0.423 |
0.425 |
| 4350 |
0.426 |
0.423 |
0.425 |
|
 |
| |
|
