ASTM E407 Practice for Microetching Metals and Alloys

ASTM E407 is a standard practice used to microetch metals and alloys to reveal their microstructure for microscopic examination. It provides a standardized procedure for preparing metal samples for analysis.


Introduction to ASTM E407

ASTM E407 establishes guidelines for the microetching process, which involves selectively removing surface layers of metals and alloys through chemical etching. This practice aims to enhance the visibility and contrast of the microstructure, enabling accurate analysis and interpretation of the material’s internal characteristics. Microetching is commonly used in metallurgical research, quality control, and failure analysis.

ASTM E407 test method allows for the evaluation of grain size, grain boundaries, phases, inclusions, and other microstructural features.

ASTM E407 Test Method

A representative sample is obtained from the metal or alloy of interest and preliminary macroetching or macroscopic examination is performed. The ASTM E407 practice includes the following steps:

Microetching Solution PreparationThe microetching solution is prepared according to the specifications and consists of chemical reagents dissolved in a suitable solvent, such as water or alcohol. The prepared sample is immersed into the microetching solution for a specified period, and the etching time and temperature are controlled based on the material and the desired level of surface removal. 
Rinse and InspectionAfter the etching time has elapsed, the sample is removed from the solution and thoroughly rinsed with water to halt the etching process. The sample is inspected under a microscope, using appropriate magnification and lighting techniques to visualize the microstructure.

ASTM E407 Specimens

Specimen detailsASTM E407 specimens are metals and alloys, including ferrous and non-ferrous metals, such as steel, aluminum, copper, titanium, and their alloys.
Specimen dimensionsThe test standard does not provide specific dimensions or geometry for the samples, as they vary depending on the application and analysis requirements.
Specimen preparationThe sample surface is properly prepared, ensuring it is free from contaminants, scratches, or other surface defects that interfere with the microstructural analysis.

ASTM E407 Results

The test method ASTM E407 allows for the examination and evaluation of various microstructural features of metals and alloys. The results obtained from the microstructure analysis are used for grain size determination, phase identification, inclusion analysis, and defect detection. 

Tests Related to ASTM E407

Other ASTM standards related to metallography and microstructural analysis include ASTM E3 for preparing metallographic specimens and ASTM E340 for microetching metals and alloys.


Where can I get the astm e407 tested?

You can share your astm e407 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 e407 test to various testing techniques.

How much do I need to pay for the astm e407 test?

Please contact us for a detailed quote for your astm e407 testing needs. Cost incurred to carry out different astm e407 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 e407?

The required number of samples or specimens should comply with the procedure given in the astm e407 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 e407 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 e407 test?

The turnaround time for astm e407 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 e407 tested?

You can share your astm e407 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 e407 test to various testing techniques.

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