The ASTM D454 test method is used to determine the physical properties of vulcanized rubber under accelerated conditions of elevated temperature and at high air pressure. The physical properties of rubber and other rubber products may deteriorate with time due to oxidation and thermal aging. ASTM D454 (Standard Test Method for Rubber Deterioration by Heat and Air Pressure). This test may not provide the required correlation with service performance in some cases, as the performance conditions differ widely. But this test helps evaluate rubber compounds on a laboratory comparison basis.
ASTM D454 Standard Test Method for Rubber Deterioration by Heat and Air Pressure
What is ASTM D454?
ASTM D454 Sample Preparation Guide
The standard samples for ASTM D454 are dumbbell-shaped, as described in ASTM D412. The most typical tested shape is a die-cut C dumbbell sample with an overall length of 115 mm (gauge length of 25 mm), a width of 6 mm, and a thickness of 3 mm. The thickness of the sample is measured three times, and the median value is taken.
What are the Testing Procedure and Requirements for the ASTM D454?
For the ASTM D454 test, the samples are preheated to the operating temperature of 1251°C (2571.8 °F). Then, the samples are suspended vertically in the pressure chamber for exposure.
During the exposure periods, the air pressures should be maintained at 55014 kPa (802.0 psi). If possible, simultaneous exposure of a varied group of different compounds is avoided. The samples are placed in the heated chamber for a particular exposure period. After that, the chamber is closed immediately, and air pressure is applied. The whole operation should be completed within 3 minutes. However, the time interval from the start is recorded until the chamber temperature reaches 125 °C (257 °F). Then, appropriate exposure periods are selected based upon the rate of deterioration of the specific material being tested.
The time intervals used in ASTM D454 testing are 3, 5, 8, 12, 20, and 30 hours. The air pressure is released gradually at the end of the exposure period. The samples are removed from the pressure chamber within 5 minutes to avoid porosity formation in the samples. Then, the samples are cooled to room temperature on a flat surface and allowed to rest between 16 and 96 hours before evaluating the physical properties. Finally, gauge lines are applied to determine elongations of the samples.
ASTM D454 Analysis Results and Interpretation
ASTM D454 is used to evaluate rubber deterioration under heat and air pressure.
For ASTM D454, the results of the air pressure heat test for each exposure period in each physical property are expressed as a percentage change.
P=A-OO100
where:
P= percentage change in property,
O= original value, and
A= value after aging or exposure.
FAQ
Where can I get the astm d454 tested?
You can share your astm d454 testing requirements with MaTestLab. MaTestLab has a vast network of material testing laboratories, spread across the USA and Canada. We support your all material testing needs ranging from specific astm d454 test to various testing techniques.
How much do I need to pay for the astm d454 test?
Please contact us for a detailed quote for your astm d454 testing needs. Cost incurred to carry out different astm d454 testing methodology depends on the type of raw material; number of samples, coupons, or specimens; test conditions, turn around time etc. Costs of some ASTM testing methods start from $100 and the final value depends upon the factors listed above. Please contact us for the best and latest prices.
How many samples are required for astm d454?
The required number of samples or specimens should comply with the procedure given in the astm d454 standard. However, the MaTestLab operations team can assist you for your special requirements once you share your testing details with us.
How much discount can I get on the astm d454 test?
MaTestLab has a vast testing laboratory network, hence we bring you the best testing facilities in a cost-effective way. We offer considerable discounts (15-20%) to our returning customers based on test volume and frequency.
How many days will it take to complete the astm d454 test?
The turnaround time for astm d454 test methodology depends upon the test procedure mentioned in the standard test document. However, we at MaTestLab understand your research requirements and hence try to get your test completed within the least possible time.
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