Fe-Fe₃C Phase Diagram

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  "data":{"values":[
    {"x":0,"y":1538,"phase":"liquidus"},{"x":0.5,"y":1495,"phase":"liquidus"},{"x":2,"y":1450,"phase":"liquidus"},{"x":4.3,"y":1147,"phase":"liquidus"},{"x":6.7,"y":1227,"phase":"liquidus"},
    {"x":0,"y":1538,"phase":"solidus"},{"x":0.5,"y":1410,"phase":"solidus"},{"x":2,"y":1147,"phase":"solidus"},{"x":4.3,"y":1147,"phase":"solidus"},{"x":6.7,"y":1147,"phase":"solidus"},
    {"x":0,"y":912,"phase":"A3"},{"x":0.4,"y":820,"phase":"A3"},{"x":0.77,"y":727,"phase":"A3"},
    {"x":0.77,"y":727,"phase":"Acm"},{"x":2,"y":900,"phase":"Acm"},
    {"x":0,"y":727,"phase":"eutectoid"},{"x":6.7,"y":727,"phase":"eutectoid"}
  ]},
  "mark":{"type":"line","interpolate":"monotone"},
  "encoding":{
    "x":{"field":"x","type":"quantitative","title":"Carbon (wt %)"},
    "y":{"field":"y","type":"quantitative","title":"Temperature (°C)"},
    "color":{"field":"phase","type":"nominal"}
  },
  "width":520,"height":340
}