Light micrograph of spheroidal cast iron in thin section. Cast iron (or pig iron) is iron containing to 4% carbon. The addition of magnesiu

---

Light micrograph of spheroidal cast iron in thin section. Cast iron (or pig iron) is iron containing to 4% carbon. The addition of magnesium causes the carbon, as graphite, to form small spheres (dark spots). They are surrounded by smooth envelopes of ferrite (body- centred cubic crystalline iron), seen here as orange. These envelopes are held in a matrix of grainy pearlite (iron carbide spheres), shown here as yellow/brown. Interference contrast illumination. Magnification x30 at 35mm , x60 at 6x7cm size.

---

Size: 4702px × 3085px
Photo credit: © ASTRID & HANNS-FRIEDER MICHLER/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: cast, cementite, chemical, chemistry, compound, compounds, ferrite, iron, light, lm, metal, micrograph, orange, pearlite, spheroidal