Grey Iron Grades

The most common engineering alloy because of its relatively low cost and good machinability.

It is named after the grey color of the fracture it forms, which is due to the presence of graphite in flake form. Due to this cast grey iron is known as lamellar graphite cast iron, too.

Grey iron also experiences less solidification shrinkage than other cast irons.

Grey Iron Grades

MATERIAL GRADE EN 1561:2011	HB	Tensile Strength Rm (MPa)	Yield Strength Re (MPa)	Elongation A5 (%)
EN-GJL-150 EN-GJL-HB175	125-225	150-250	100-165	< 1
EN-GJL-200 EN-GJL-HB195	135-260	200-300	130-195	< 1
EN-GJL-250 EN-GJL-HB215	160-255	250-350	165-230	< 1
EN-GJL-300 EN-GJL-HB235	165-255	300-400	195-260	< 1
EN-GJL-350 EN-GJL-HB255	185-275	350-450	230-285	< 1

MATERIAL GRADE EN 1561:2011	HB	Norway NS11101	Sweden ss-14-	Denmark DS 11301	Germany DIN 1693	Finland SFS H11.51	England BS 1452,1977	USA ASTM A4876
EN-GJL-150 EN-GJL-HB175	125-225	SJG 150	0015	GG 15	GG 15	GRS 15	Grade150	Class 20B
EN-GJL-200 EN-GJL-HB195	135-260	SJG 200	0120	GG 20	GG 20	GRS 20	Grade 220	Class 30B
EN-GJL-250 EN-GJL-HB215	160-255	SJG 250	0125	GG 25	GG 25	GRS 25	Grade 260	Class 35B
EN-GJL-300 EN-GJL-HB235	165-255	SJG 300	0130	GG 30	GG 30	GRS 30	Grade 300	Class 45B
EN-GJL-350 EN-GJL-HB255	185-275	SJG 350	0135	GG 35	GG 35	GRS 35	Grade 350	Class 50B

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