Grey cast iron also known as flake graphite cast iron, is a type of casting iron in which most of the carbon is present as flake graphite .The propertises of grey cast iron depends on the distribution, sizs and amount of graphite flakes, and the matrix structure. These factorys are in turn, influenced mainly by the manufacturing conditions, chemical composition, solidification time and rate of cooling in he mould. Grey cast iron exhibit low to moderate strength, low modulus of elasticity, low notch sensitiviy, high thermal conductivity, moderate resistance of thermal stock , and outstanding castability.

EQUIVALENT STANDARDS TECHNICAL SPECIFICATIONS

DIN EN 1561

Germany

France

England

Netherlands

Sweden

USA

Hardness

Tensile Strength

Proof Stress

Elongation

Machinability

Microst-ructure

1:100

1:500

DIN 1691

NF

BS

NEN

MNC

ASTM A48

HB 30

Rm N/mm?/font>

Rp0,1 N/mm?/font>

A %

EN-GJL-150

GG-15

Ft 15 D

Grade 150

GG 15

01 15-00

20 B / 25 B

150/190

150-250

98-165

0,8-0,3

very good

Perlit, groblamellar

EN-GJL-200

GG-20

Ft 20 d

Grade 180 / Grade 220

GG 20

01 20-00

25 B / 30 B

170/210

200-300

130-195

0,8-0,3

very good

Perlit, roughlamellar

EN-GJL-250

GG-25

Ft 25 D

Grade 220 / Grade 260

GG 25

01 25-00

35 B / 40 B

180/230

250-350

165-228

0,8-0,3

very good

Perlit, finelamellar