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The distinctive feature of cast iron GJL250 is the graphite structure, which solidifies in the form of flakes, creating a discontinuity in the ferrous matrix. This structure gives the alloy:

  • Good wear resistance
  • Excellent mechanical strength
  • Easy machinability

 

GJL250 (G25)
Hardness HB (30) 170 - 240
Tensile strength Rm N/mm2 250
Yield strength Rp 0.2 -
Elongation A % 1 - 3
Structure Pearlitic
Graphite Lamellar
Determining wall thickness [mm] 5
10
20
40
80
Prescribed tensile strength Rm (on specimen) [N/mm2] from 250 to 350
Prescribed tensile strength Rm (on sample) [N/mm2] -
-
210
190
170
Predictable tensile strength Rm (on sample) [N/mm2] 250
225
195
170
155