UNI 5007 G20 is a most commonly used material for gray cast iron, G20 is the grade and UNI 5007 is the standard used in Italy.
Herein, we introduce the chemical composition, mechanical properties, applications and its equivalent grades.
Chemical Composition for UNI 5007 G20 Gray Cast Iron:
The normal chemical composition for this grade is as the following:
C |
Si |
Mn |
S |
P |
3.3 - 3.5 |
1.4 - 2.4 |
0.7 - 1 |
max 0.15 |
max 0.2 |
This is just an experience data. According to the related standards, the mechanical properties are the inspection standard. The iron foundries can adjust the chemical components according to their own experience.
Mechanical Properties for UNI 5007 G20 Gray Cast Iron:
From Italy UNI 5007 1969
Grade |
Nominal section thickness |
Diameter of as-cast test bar |
Minimum tensile strength |
Suggested Brinell hardness |
mm |
mm |
N/mm2 |
kgf/mm2 |
tonf/in2 |
G20 |
3.5-7.5
7.5-15
15-30
30-50 |
30
30
30
30 |
255
196
147
118 |
26
20
15
12 |
16.5
12.7
9.5
7.6 |
235
205
175
155 |
Applications:
Both G20 and G25 gray cast iron are suitable for all types of mechanical parts that are not subject to high mechanical stress. Therefore, it is very suitable for stove bars of old steam locomotives and g-bars and bridges for steam-powered ships and railings. It can also be used for the manufacture of cylinders, bases, machine beds, flywheels, cylinder liners, cylinder blocks, pistons, brake wheels, gearboxes, pressure valves, coupling plates, and others.
Cross reference table for Cast iron G20 (UNI) and its European equivalent EN-GJL-200 (EN-JL1030) (EN)
EU
EN |
USA
- |
Germany
DIN,WNr |
Japan
JIS |
France
AFNOR |
England
BS |
Italy
UNI |
Belgium
NBN |
EN-GJL-200 (EN-JL1030) |
200/225
25B
30
30B |
0.6020
GG20 |
FC200 |
FGL200
Ft20D |
180
200/220
220
Grade180
Grade260 |
G20 |
FGG20 |
Spain
UNE |
China
GB |
Sweden
SS |
Bulgaria
BDS |
Hungary
MSZ |
Poland
PN |
Romania
STAS |
Austria
ONORM |
Australia
AS |
FG20 |
HT20-40
HT200 |
01-20-00
0120 |
Vch20 |
OV20 |
Z120 |
FC200 |
GG20 |
T220 |
Norway
NS |
Russia
GOST |
Inter
ISO |
India
IS |
Netherlands
NEN |
Taiwan
- |
Luxembourg
- |
COPANT
- |
SJG200 |
SCH20 |
200
JL200 |
FG200 |
GG20 |
FC200 |
FGG20 |
FG200 |
|
