Characteristics of cast iron

BIRDIE foundry provides you with a guide to the mechanical and physical characteristics of cast iron.

Lamelar iron

Mechanical characteristics

  Density (kg/dm³) Tension effort (MPa) Breackdown effort (MPa) Elongation Elasticity module (GPa) Average coefficient of thermal expansion between 20(°C) (10-6/(°C))
  20°C (-)100°C 200°C 400°C
EN GJL 150 7,1 98 -165 150 - 250 0.3 - 0.8 78 - 103 10 11.7 13
EN GJL 200 7,15 130 - 195 200 - 300 0.3 - 0.8 88 - 113 10 11.7 13
EN GJL 250 7,2 165 - 228 250 - 350 0.3 - 0.8 20 -100 200 400
EN GJL 300 7,25 195 - 260 300 - 400 0.3 - 0.8 108 - 137 10 11.7 13

 

Physical characteristics

  Thermal conductivity(W/m.°C) Specific thermal capacity (J/kg.°C) Specific electrical resistivity (mm²/m) Density (kg/dm³) Poison coefficient
  100 °C 200 °C 300 °C 400 °C 500 °C 200 °C 600 °C 20 °C 20 °C 20 °C
EN GJL 150 52,5 51 50 49 48,5 460 535 0,8 7,1 0,26
EN GJL 200 50 49 48 47 46 460 535 0,77 7,15 0,26
EN GJL 250 100 200 300 400 500 200 600 20 20 20
EN GJL 300 47,5 56 45 44 43 460 353 0,7 7,25 0,26

 

Spheroidale iron

Mechanic characteristics

  EN GJS 350 22 LT EN GJS 400 18 LT EN GJS 400 15 EN GJS 450 10 EN GJS 500 7 EN GJS 600 3
Breaking strength Rm (MPa) 350 400 400 450 500 600
Elastic limit at 0.2% RPO, 2 and MPA 220 240 250 310 320 370
Elongation in % 22 18 15 10 7 3
Resilience at 23°C 17 14 - - - -
Resilience at -20°C - 12 - - - -
Resilience at -40°C 12 - - - - -
Brinell hardness < 160 130 - 175 135 - 180 160 - 210 170 - 230 190 - 270
Elasticity module (GPa) 169 169 169 169 169 174
Endurance limit 1 (MPa) 169 169 169 169 169 174
Endurance limit 2 (MPa) 114 122 - 128 134 149
Density (kg/dm^3) 7,1 7,1 7,1 7,1 7,1 7,2
Thermal conductivity 36,2 36,2 36,2 36,2 35,2 32,5
λ (W/(K.m))
Coefficient of linear expansion 12,5 12,5 12,5 12,5 12,5 12,5
α up to 200°C (10-6/K)
Poisson Coefficient - - - - - -

 

Spheroidale iron - after

Mechanical characteristics

  EN GJS 700 2 EN GJS 800 2 EN GJS 450 18 EN GJS 500 14 EN GJS 600 10
Breaking strength Rm (MPa) 700 800 450 500 600
Elastic limit at 0,2% RPO, 2 and MPA 420 480 350 400 470
Elongation in % 2 2 18 14 10
Resilience at 23°C - - 8 3 -
Resilience at -20°C - - 4 3 -
Resilience at 40°C - - 3 2 -
Brinell hardness 225 - 305 245 - 335 170 - 200 185 - 215 200 - 230
Elasticity module (GPa) 176 176 176 170 170
Endurance limit 1 (MPa) 280 304 210 225 275
Endurance limit 2 (MPa) 168 182 130 140 165
Density (kg/dm³) 7,2 7,2 7,1 7 7
Thermal conductivity 31,1 31,1 - - -
λ (W/(K.m))
Coefficient of linear expansion 12,5 12,5 - - -
α up to 200°C (10-6/K)
Poisson Coefficient          

 

Sheroidale iron - high strength and alloy

Mechanical characteristics

  EN GJS 800 10 EN GJS 1050 6 EN GJS 1200-3 EN GJS SiMo40-6 EN GJS SiMo45-10 EN GJSA XNiSiCr35-5-2
Breaking strength Rm (MPA) 800 105 120 480 550 380
Elastic limite at 0,2% RPO, 2 and MPA 500 700 850 380 460 210
Elongation en % 10 6 3 8 5 10
Resilience at 23°C 10 - - - - -
Brinell hardness 250 - 310 320 - 380 340 - 420 190 - 240 200 - 250 130 - 170
Resistance to fracture at 780°C - - - 70 70 130
Elasticity limit à 0.2% - - - 35 35 90
Elasticity module - - - 30 30 100