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