Glossary of Forging Terms | Forging Industry Association. Metallurgy Of Carbon Steel. Mixture of ferrite and pearlite grains; temperature below A1, therefore microstructure not significantly affected. Pearlite transformed to Austenite, but not sufficient temperature available to exceed the A3 line, therefore not all ferrite grains transform to Austenite. On cooling, only the transformed grains will be normalised. Temperature just exceeds A3 line, full Austenite transformation. On cooling all grains will be normalised Temperature significantly exceeds A3 line permitting grains to grow. On cooling, ferrite will form at the grain boundaries, and a course pearlite will form inside the grains. Online Materials Information Resource - MatWeb. Search Results: Data Analysis of Grade 91 Steel Creep Tests.
Materials - Chemical Composition (Requirements) for Carbon Alloy Steels used in Piping applications - Alloy Steel Chart.