MaTestLab > Test Standards > ASTM G151 Standard Practice for Exposing Nonmetallic Materials in Accelerated Test Devices that Use Laboratory Light Sources
Last updated 24th February 2025
ASTM G151 Standard Practice for Exposing Nonmetallic Materials in Accelerated Test Devices that Use Laboratory Light Sources
ASTM G151 is a standard test method used to expose non-metallic materials to accelerated environmental conditions, simulating harsh outdoor environments. This test allows manufacturers, researchers, and engineers to assess the durability and performance of materials, aiding in the development of desirable products.
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ASTM G151 Introduction
ASTM G151 provides a controlled and accelerated approach to subjecting non-metallic materials to environmental stress factors, such as sunlight, moisture, and temperature variations. By replicating outdoor weathering conditions in a laboratory setting, this test method helps predict material degradation and assess long-term performance under harsh environmental exposure.
Outdoor exposure can significantly impact non-metallic materials over time, leading to discoloration, embrittlement, cracking, and other forms of deterioration. Accelerated testing with ASTM G151 expedites the weathering process, allowing manufacturers to evaluate material changes.
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ASTM G151 Standard Analysis
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G151Test Method
The ASTM G151 test method proceeds as follows:
Specimen Testing
The material specimens are placed in the accelerated test device, which exposes them to the controlled environmental stressors. The test device cycles through the specified exposure conditions. Throughout the testing process, the material’s visual appearance, physical properties, and performance are periodically evaluated and recorded.
Cycles
Ultraviolet (UV) light exposure simulates the degrading effects of sunlight, including photodegradation and fading of pigments. Moisture and condensation exposure simulates the effects of rain, dew, and humidity, which can lead to water absorption and promote mold growth. Alternating cycles of high and low temperatures subject materials to thermal stress, replicating the expansion and contraction they experience in real-world conditions.
ASTM G151Equipment and Sample Preparation
Specimen details
G151 specimens are representative of the non-metallic materials being evaluated.
Specimen dimensions
ASTM G151 does not specify a standard specimen size, as it varies based on the material type and the specific requirements.
Specimen preparation
The material specimen is prepared to ensure it is free from defects and contaminants. Surface treatments and coatings are applied.
ASTM G151 Results and Interpretation
The test method G151 results provide valuable data on how the non-metallic material responds to accelerated weathering conditions. Material changes, such as color shifts, gloss loss, and surface degradation, are carefully analyzed to assess the material’s durability and predict its performance over extended periods of exposure.
Tests Related to ASTM G151
ASTM G154 – Standard Practice for Operating Fluorescent Light Apparatus for UV Exposure of Nonmetallic Materials is a related standard.
Use of ASTM G151 in Various Industries
It is used widely in the automobile industry, construction, and consumer products to test the UV resistance, performance, and durability of material compounds when applied to extreme environments. It reduces maintenance costs and elongates the life span of the product.
Materials Commonly Tested with ASTM G151
The standard tests the materials, including plastics, paints, coatings, rubber, and composites, under accelerated weathering to determine their resistance to UV in terms of essential outdoor exposure where UV stability is pertinent to ensure aesthetic as well as functional integrity.
Common Challenges and Troubleshooting in ASTM G151 Testing
A challenge with testing is the control of large chambers to expose specimens consistently, where exposure conditions may depart from expectations and raise complications in comparing performances. Troubleshooting requires recalibration of light sources and prevention of premature deterioration of test samples.
Safety and Best Practices in ASTM G151 Testing
Because the test employs UV light sources, the operation requires PPE, regular calibration of light sources, environmental control monitoring, and maintenance of temperatures and humidity that will limit exposure risks and yield the data required with accuracy.
Importance of ASTM G151
The standard plays a significant role in the long-term assessment of nonmetallic materials’ performance in simulated environments. The development of products is guided, ensuring compliance with quality standards and therefore regulations to provide material durability and ensure customer satisfaction.
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FAQ's
Where can I get the astm g151 tested?
You can share your astm g151 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 g151 test to various testing techniques.
How much do I need to pay for the astm g151 test?
Please contact us for a detailed quote for your astm g151 testing needs. Cost incurred to carry out different astm g151 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 g151?
The required number of samples or specimens should comply with the procedure given in the astm g151 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 g151 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 g151 test?
The turnaround time for astm g151 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.
Where can I get the astm g151 tested?
You can share your astm g151 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 g151 test to various testing techniques.
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