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LM of spheroidal cast iron

LM of spheroidal cast iron

A630/0283

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Credit

ASTRID & HANNS-FRIEDER MICHLER / SCIENCE PHOTO LIBRARY ASTRID & HANNS-FRIEDER MICHLER / SCIENCE PHOTO LIBRARY

Caption

Light micrograph of spheroidal cast iron in thin section. Cast iron (or pig iron) is iron containing 2.5% to 4% carbon. The addition of 0.05% magnesium makes the carbon (as graphite) form small nodules (dark spots). They are surrounded by smooth envelopes of ferrite (body- centred cubic crystalline iron). These envelopes are held in a matrix of grainy pearlite spheres (iron carbide). Interference contrast illumination. Magnification x30 at 35mm size.

Release details

Model release not required. Property release not required.

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