ASTM D4636 Test Specimens

Test specimens used in ASTM D4636 corrosion and oxidation testing (C&O). This test method includes a number of possible variations and test conditions, including differences in the test specimens. The test specimens can be square-shaped or washer-shaped. Each test specimen is polished per ASTM D4636, and is batch traceable to the original material. ASTM D4636 test specimens can be copper, steel, aluminum, magnesium, cadmium, silver, titanium, silicon-iron-bronze, and tool steel. The test can also be modified to use non-standard test specimens.
 
Square specimens (also called coupons), measure 1" x 1" x 0.032" (25.4mm x 25.4 mm x 0.81mm). The test method calls for square specimens in these materials:
CA110 Copper
1010 Steel
2024 Aluminum
AZ31B Magnesium
Cadmium
 
Washer specimens have a 3/4" outside diameter (OD) and 1/4" inside diameter (ID), and are 0.032" thick (19.05mm OD x 6.35mm ID x 0.81mm). The test method calls for washer specimens in these materials:
R56080 Titanium**
AZ31B Magnesium
M50 Steel
C659 Silicon-iron-bronze
Silver 99.95% pure
2024 Aluminum
 
The ASTM D4636 test method is the result of combining FTM 5307 and FTM 5308. Because ASTM D4636 is widely used and referenced by other test methods and specifications, we also provide modified ASTM D4636 test specimens. Please let us know if you're looking for a non-standard test specimen; we'll be happy to work with you.
 
**ASTM D4636 Alternate 1 (washers) specifies a Titanium test specimen that is UNS R56080, Titanium 8%Mn. Unfortunately, R56080 / 8Mn titanium is no longer commercially available. Back in 2018, Metaspec bought out the stock of the only supplier that had the material. That raw material supply has been gradually consumed in the years since. 
 
Currently, we recommend CP Grade 2 AMS 4902 titanium as a substitute for the R56080 / 8Mn titanium. If you have any questions or would like to discuss other alternative titanium alloys, please contact us.