What are the conditions for ASTM D1238?

 

1. Test Temperature: The test is conducted at a specific temperature that is determined based on the type of material being tested. The most common test temperatures are 190°C (374°F) and 230°C (446°F).

 

2. Test Load: A specified weight or load is applied to the material during the test. The standard test loads are typically 2.16 kg (4.76 lbs) and 5 kg (11.02 lbs).

 

3. Test Piston Diameter and Length: The test piston, also known as the die, has a specific diameter and length. The standard piston diameter is 9.55 mm (0.375 inches), and the standard length is 6.35 mm (0.25 inches).

 

4. Test Sample Preparation: The material is prepared in the form of pellets, granules, or powder, depending on its physical state. The sample is typically dried to remove any moisture before testing.

 

5. Test Procedure: The material is loaded into a heated barrel and allowed to melt. The molten material is then extruded through the die under a specified load. The flow rate of the material is measured in grams per 10 minutes (g/10 min) or grams per minute (g/min).

 

It is important to note that the specific conditions for conducting the ASTM D1238 test may vary depending on the material being tested and the requirements of the application. Manufacturers and testing laboratories should refer to the ASTM D1238 standard for detailed instructions and any specific modifications or additional requirements.