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Grey Cast Iron Grades

May 17, 2017

grey cast iron grades
Grade Minimum tensile
strength(Mpa)
  Minimum
percentage
elongation
        Brinell                                                                                                                                                                hardness

number(BHN)

     Predominant
constituent of matrix
SG 900/2 900 2 280-360 Bainite or tempered
martensite
SG 800/2 800 2 245-335 Pearlite or tempered
structure
SG 700/2 700 2 225-305 Pearlite
SG 600/3 600 3 190-270 Ferrite+Pearlite
SG 500/7 500 7 160-240 Ferrite+Pearlite
SG 450/10 450 10 160-210 Ferrite
SG 400/15 400 15 130-180 Ferrite
SG 400/18 400 18 130-180 Ferrite
SG 350/22 350 22 ≤150 Ferrite
SG 700/2A 700 2 220-320 Pearlite
SG 600/3A 600 2 180-270 Pearlite+Ferrite
SG 500/7A 450 7 170-240 Pearlite+Ferrite
SG 400/15A 390 15 130-180 Ferrite
SG 400/18A 390 15 130-180 Ferrite
SG 350/22A 330 18 ≤150 Ferrite

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