How to determine carbon content in steel by metallographic method

1. The carbon content of carbon steel can be roughly estimated by this method, but the accuracy of metallographic determination of carbon content in steel is definitely not high.

2. The carbon content at the precipitation point of carbon steel is 0.7 1%. At this time, the overall structure of the material is pearlite. With the decrease of carbon content, ferrite content increases and pearlite content decreases. When the carbon content is 0, the whole structure is ferrite. Therefore, the carbon content can be estimated.