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D1349-14 – Standard Test Method Technical Guide
🌡️ Standard Temperature and Humidity Conditions
The ASTM D1349-14 (Reapproved 2024) standard practice establishes the foundational temperature and humidity conditions required for consistent and comparable testing of rubber compounds. Reliable comparisons between different laboratories and rubber compounds hinge critically on standardizing the environmental conditions materials are subjected to both before and during testing.
Defined Terminology (Section 2):
- Room Temperature: A general temperature range from 20 to 30°C (68 to 86°F).
- Standard Laboratory Temperature: Specifically defined as 23 ± 2°C (73.4 ± 3.6°F).
- Standard Laboratory Atmosphere: Combines both temperature and humidity: 23 ± 2°C with a relative humidity of 50 ± 10% RH (40 to 60% RH).
⚠️ Precedence Rule: Any specification, procedure, or method that specifies its own test temperatures or humidity conditions shall take precedence over the general recommendations in this practice. The temperatures and humidities defined here serve as the default when no specific conditions are stated in the referencing document.
Standard Test Temperatures (Section 3)
| 🟦 Temperature (°C) | 📏 Tolerance (±°C) | © 2026 TNLab — This article is a technical interpretation for reference only. The original standard as published by ASTM International takes precedence. 📥 Standard Documents Download |
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