Astm D618-21 Pdf
The ASTM D618-21 standard eliminates these variables. It ensures that whether you are testing in Arizona (dry) or Louisiana (humid), your results are comparable.
The Definitive Guide to ASTM D618-21: Conditioning Plastics for Testing Introduction
ASTM D618-21 PDF: Standard Practice for Conditioning Plastics for Testing
ASTM D618-21 establishes standard procedures for conditioning plastic specimens to ensure reproducible test results by controlling temperature and humidity, with Procedure A commonly requiring 40-88 hours at 23°C and 50% relative humidity. This practice is essential for stabilizing physical and electrical properties across various lab environments. The official standard can be purchased and downloaded at ASTM International .
D618 Standard Practice for Conditioning Plastics for Testing. ASTM International ASTM D618 Testing - Applied Technical Services
Requires immersion in water at a specific temperature. astm d618-21 pdf
It brings specimens to a stable, known temperature before testing.
Getting the official is straightforward, but you need to know where to look. Here are your best options.
± 2 °C for temperature; ± 10% for humidity. (Note: Closer tolerances of ± 1 °C and ± 5% RH are required for referee testing or precise electrical evaluations). 2. Standard Conditioning Procedures
Not all authorized resellers have the same DRM restrictions, so it’s a good idea to check a vendor’s specific policy before making your purchase.
is often compared to ISO 291 – Standard Atmospheres for Conditioning and Testing Plastics . While the two standards are technically comparable, ASTM D618 is generally considered more adaptable, specific, and widely used in North American manufacturing and testing laboratories. How to Obtain the ASTM D618-21 PDF The ASTM D618-21 standard eliminates these variables
Before any meaningful testing can begin, the plastic specimens must be prepared. But why is a separate "conditioning" process necessary? The answer lies in the inherent nature of plastics.
Used for general-purpose testing of common plastics. Conditions: Specimens are conditioned at Duration: At least 40 hours for specimens ) or under in thickness. At least 88 hours for specimens greater than in thickness. Procedure B (Accelerated Drying / Low Humidity)
The "21" indicates the revision year, with the current version being adopted in 2021. It aligns with , making it an internationally recognized standard. Why is Conditioning Necessary?
Conditioning Duration / Temperature / Relative HumidityConditioning Duration / Temperature / Relative Humidity
: Subjecting specimens to extreme temperature or humidity to simulate real-world service environments. Key Conditioning Procedures This practice is essential for stabilizing physical and
ASTM D618-21 provides a crucial framework for conditioning plastics to ensure the reproducibility of mechanical, thermal, and electrical testing by controlling temperature and humidity. By establishing procedures like Procedure A (
| Feature | ASTM D618-21 | ISO 291 | | :--- | :--- | :--- | | Standard Temp | 23°C ± 2°C | 23°C ± 2°C | | Standard RH | 50% ± 5% | 50% ± 10% (looser) | | Conditioning Time | 40 hours min | 88 hours (for most materials) | | Test Time Limit | Immediate | Within 15 minutes |
Test the specimens immediately upon removal from the conditioning environment. If the testing machine is outside the conditioned room, transfer the specimens in sealed bags or desiccators to prevent ambient air from altering the material state.
is the standard practice for conditioning plastics for testing. Officially titled "Standard Practice for Conditioning Plastics for Testing," this document establishes uniform environments (temperature and relative humidity) and time periods that plastic specimens must be exposed to before mechanical, electrical, or optical testing.