File:Steel pd lt.svg

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English: Steel phase diagram

Iron-carbon phase diagram under atmospheric pressure

This diagram is limited by pure iron on the left and by iron carbide on the right. The mains phases are: 

  * α iron: ferrite, ferritic steel
  * γ iron: austenite, austenitic steel
  * iron carbide: cementite, Fe3C.

We can see a eutectic and a eutectoid; these phases crystallise as a stacking of fine strips of pure phases (iron and cementite) in case of the eutectoid, or a pure iron containing small balls of cementite for the eutectic. Although it is heterogeneous, these phases behave like homogeneous pure bodies.

Steel is between 0 and 2.06 mass percent of carbon. Cast iron is between 2.06 and 6.67%.

Note that this diagram is for illustrative purposes only, and is not thermodynamically accurate.

SVG Author : en:User:User A1

Original Author : Christophe Dang Ngoc Chan
Date
Source Translation File:Steel pd.svg
Author Original uploader was en:User:A1 at en.wikipedia

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current12:38, 7 August 2012Thumbnail for version as of 12:38, 7 August 2012420 × 380 (348 KB)MHz`as (talk | contribs)

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