MaTestLab > Test Standards > ASTM C272 Standard Test Method for Water Absorption of Core Materials for Sandwich Constructions
Last updated 8th March 2025
ASTM C272 Standard Test Method for Water Absorption of Core Materials for Sandwich Constructions
ASTM C272 exposes sandwich core specimens to moisture and measures the mass increase to determine water absorption. The absorbed water affects the core's properties, like electrical and mechanical properties, and may also impact the behavior of sandwich structures. It's important to note that facings bonded on both sides of the core in a sandwich panel can affect water absorption. This method provides standardized moisture absorption data for various applications, including design, research, and quality assurance.
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ASTM C272 Introduction
ASTM C272 covers the determination of the relative amount of water absorption by various types of sandwich construction core materials when immersed in water or when subjected to a high relative humidity environment. Permissible core material forms include those with continuous bonding surfaces, such as balsa wood and foams, as well as those with discontinuous bonding surfaces, such as honeycomb.
ASTM C272 Test Method
Water Absorption Test
According to ASTM C272, the water absorption test has three procedures: Test Method A for 24-hour immersion, Test Method B for Elevated Temperature Humidity, and Test Method C for Maximum Percent Weight Gain.For ASTM C272, five test samples measuring 3.0 inches by 3.0 inches are needed. They are soaked in deionized water and removed after specified times
Oven Drying
The samples are dried in an oven, cooled in a desiccator, and then weighed using an analytical balance to the nearest 0.1 mg.
C272 Equipment and Sample Preparation
Specimen Details
ASTM C272 involves exposing sandwich core specimens to a defined moisture condition and determining the amount of water absorbed by measuring the mass increase in the specimen. At least five specimens per test condition are tested unless valid results can be obtained through the use of fewer specimens, such as in a designed experiment.
Specimen Size
The water absorption test per ASTM C272 uses core material samples measuring three inches by three inches by 0.5 inches in thickness.
C272 Test Results and Interpretation
Water absorption by structured core materials is determined using the standard method ASTM C272, which involves noting the amount of water absorbed and the change in mass of each specimen.
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Tests Related to ASTM C272
ASTM C272 is related to tests, including ASTM D1193 for reagent water specification, ASTM E122 for calculating the sample-to-size estimate, and ASTM D3878 for terms associated with composite elements.
Use of C272 in Various Industries
This method is applicable in aerospace, marine, automotive, and construction to evaluate the absorption of water by core materials used in sandwich panels. Such material is lightweight yet highly strengthened and durable in places of moisture or varying humidity fluctuations, ensuring strength structure integrity.
Materials Commonly Tested with C272
It tests honeycomb cores, polymer foams, and balsa wood for moisture resistance in composite sandwich constructions. Both open-cell and closed-cell core materials are assessed for water uptake under controlled conditions to retain lightweight properties and mechanical strength.
Common Challenges and Troubleshooting in C272 Testing
Testing faces several challenges, such as difficulty in sealing sample edges not to allow water infiltration; ensuring consistent immersion and drying conditions; and dealing with irregular shapes or densities. Troubleshooting involves ensuring the integrity of seals; calibrating equipment; and ensuring accurate measurement of sample weights before and after testing.
Safety and Best Practices in C272 Testing
The testing safety includes careful handling of water and equipment, clean and deionized water, maintaining consistent temperatures, and drying samples for reliable weight measurements. Regular calibration and detailed documentation ensure reproducibility and accuracy.
Importance of C272
It is a crucial test to measure the long-term performance and durability of core materials in moisture-sensitive environments, thus enabling manufacturers to select structurally sound materials, thereby enhancing the reliability of the product, increasing its service life, and complying with regulatory standards.
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Where can I get the astm c272 tested?
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Please contact us for a detailed quote for your astm c272 testing needs. Cost incurred to carry out different astm c272 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 c272?
The required number of samples or specimens should comply with the procedure given in the astm c272 standard. However, the MaTestLab operations team can assist you for your special requirements once you share your testing details with us.
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The turnaround time for astm c272 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 c272 tested?
You can share your astm c272 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 c272 test to various testing techniques.
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