ASTM E539 is an official test method used to find the chemical makeup of titanium alloys. This test method uses a technique called Wavelength Dispersive X-ray Fluorescence Spectrometry (WDXRF) to examine titanium alloys across specific ranges of various elements. The values are considered as a standard when expressed in SI units. The process includes shining high-energy X-rays onto a flat metal sample. The sample sends back secondary X-rays. Machines measure these rays to see which elements are present and in what amounts.
ASTM E539 Standard Test Method for Analysis of Titanium Alloys by Wavelength Dispersive X-Ray Fluorescence Spectrometry
What is ASTM E539
What is the Scope of the ASTM E539 Test Method?
It is designed for routine production control and chemical composition assessment to ensure compliance with material specifications. This method’s analytical performance data can serve as a benchmark to assess whether similar X-ray spectrometers produce comparable precision and accuracy.
ASTM E539 Equipment and Sample Preparation Guide
This test method uses X-ray spectrometers for taking measurements. The test specimens must be large enough to be fabricated into a flat-surfaced piece that fits inside the cup used to conduct the test.
ASTM E539 Testing Procedure and Requirements
After preparing the specimen to a clean, uniform surface, high-energy X-ray photons irradiate it. From the sample, secondary X-rays are produced and emitted. Crystals diffract the light and focus it onto a detector, which records count rates at different wavelengths. The detector’s output is integrated for a set time or until the counts reach a predetermined number. The mass fractions of elements are calculated by comparing the measured radiation of unknown samples to calibration curves created with known-composition reference materials.
ASTM E539 Analysis Results and Interpretation
Mass fractions of the elements are determined in the specimen using the count rates and calibration curves.
Updated on August 29, 2026
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