ASTM C831 is the ASTM standard for measuring residual carbon, apparent residual carbon, and apparent carbon yield in coked carbon-containing brick and shapes. It provides a technical basis for evaluating how much carbon remains after coking and how much carbon is indicated by the test result, which can be important for product characterization and quality control. For purchasers, producers, and laboratories, ASTM C831 helps support more consistent testing and comparison of carbon-containing refractory shapes.

What is ASTM C831?

ASTM C831, Standard Test Methods for Residual Carbon, Apparent Residual Carbon, and Apparent Carbon Yield in Coked Carbon-Containing Brick and Shapes, defines test methods used to assess carbon-related properties in coked carbon-containing brick and shapes. The standard is focused on laboratory measurement rather than product design, and it is generally used to describe how much residual carbon remains in a fired or coked material. As a technical document, it supports consistent evaluation of these materials against a common ASTM framework.

Where is ASTM C831 used?

This standard is commonly used in testing and quality control environments that handle carbon-containing brick and shapes after coking. It is relevant wherever these materials need to be evaluated for residual carbon or apparent carbon yield, such as in manufacturing, receiving inspection, or product qualification workflows. ASTM C831 is also useful for laboratory reporting when buyers and suppliers need a shared method for comparing test results on the same type of coked material.

Why is ASTM C831 important?

ASTM C831 matters because it gives users a consistent way to measure carbon-related characteristics that may affect material performance and acceptance. Using a recognized ASTM standard can improve test repeatability, support procurement decisions, and reduce uncertainty in product evaluation. It also helps align supplier and customer expectations by establishing a common method for reporting residual carbon and apparent carbon yield in coked carbon-containing brick and shapes.

• Residual carbon measurement
• Apparent residual carbon
• Apparent carbon yield
• Coked carbon-containing brick and shapes
• Testing and quality control support