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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