Cast iron with spheroidal graphite

Designation in accordance with
DIN EN 1564
    EN-GJS-800-10 EN-GJS-1050-6 EN-GJS-1200-3
Reference analysis C   3.50 – 3.70 3.50 – 3.70 3.50 – 3.70
for medium wall thicknesses Si   2.30 – 2.60 2.30 – 2.60 2.30 – 2.60
  Mn   max. 0.40 max. 0.40 max. 0.40
  Mo   - - -
  Ni   max. 1.0 max. 1.0 max. 1.0
Microstructure    


Austenite and ferrite (ausferrite) 500:1


Austenite and ferrite (ausferrite) 500:1


Austenite and ferrite (ausferrite) 500:1

Mechanical properties 1)
Tensile strength Rm MPa 800 1050 1200
0.2 yield strength Rp0.2 MPa 500 700 850
Elongation at fracture A5 % 10 6 3
Elastic modulus E GPa 170 168 167
Notched bar impact work2) at +23 °C (RT) Joules 10 - -
Brinell hardness BHN   250 – 310 320 – 380 340 – 420
Fatigue limit3)   MPa 375 430 450
Fatigue limit4)   MPa 225 265 280
Technological properties
Usage temperature   °C < 200 < 200 < 200
Machinability     Average Average Difficult
Wear resistance     Excellent Excellent Excellent
Induction or flame-hardening capacity     Cannot be hardened or welded
Nitriding capacity     Cannot be hardened or welded
Weldability     Cannot be hardened or welded
Physical properties
Density ρ kg/dm3 7.1 7.1 7.0
Thermal conductivity λ W/(K*m) 20 – 23 20 – 23 20 – 23
Thermal expansion coefficient α up to 200 °C 10-6/K 14 – 18 14 – 18 14 – 18
      Special materials or grades not listed available on request

1) The mechanical properties of cast iron with spheroidal graphite in integrally cast Y-shaped test specimens (minimum values)
2) Mean value of three ISO-V test specimens (DIN 50115)
3) Wöhler rotating bending fatigue test, unnotched test specimen
4) Wöhler rotating bending fatigue test, notched test specimen