G30 is one grade of gray cast iron defined in Italy standard UNI 5007. This grade of cast iron has excellent wear resistance, strength and heat-treatment response compared to G20 and G25.
At the same time, it still has reasonable machinability and excellent surface finish. This level of noise and vibration damping is excellent. 
Application for UNI 5007 G30 gray cast iron:
UNI 5007 G30 gray iron is used to manufacture heavy-duty machine tools, bed bodies, presses, high-pressure hydraulic parts, frames, gears, bushings, piston rings, cams, crankshafts, cylinder blocks, cylinder heads, etc.
Chemical composition for UNI 5007 G30 gray cast iron:
Chemistry ranges are not specified in the UNI 5007 standard. The iron foundries could adjust the chemical components according to their own experience, as long as their material could meet the mechanical properties. So the chemistry listed in the following sheet just for your reference.
C |
Si |
Mn |
S |
P |
3 - 3.2 |
1.3 - 1.9 |
0.7 - 1 |
max 0.12 |
max 0.2 |
Mechanical properties for UNI 5007 G30 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 |
G30 |
7.5-15
15-30
30-50 |
30
30
30 |
294
265
206 |
30
27
21 |
19.0
17.1
13.3 |
235
215
190 |
Cross reference table for Cast iron G30 (UNI) and its European equivalent EN-GJL-300 (EN-JL1050) (EN)
EU
EN |
USA
- |
Germany
DIN,WNr |
Japan
JIS |
France
AFNOR |
England
BS |
Italy
UNI |
Belgium
NBN |
Spain
UNE |
EN-GJL-300 (EN-JL1050) |
300/325
40B
45/50
45B |
0.6030
GG30 |
FC300 |
FGL300
Ft30D |
300
Grade300 |
G30 |
FGG30 |
FG30 |
China
GB |
Sweden
SS |
Bulgaria
BDS |
Hungary
MSZ |
Poland
PN |
Romania
STAS |
Austria
ONORM |
Australia
AS |
HT3-54
HT300 |
01-30-00
0130 |
Vch30 |
OV30 |
Z130 |
FC300 |
GG30 |
T300 |
Norway
NS |
Russia
GOST |
Inter
ISO |
India
IS |
Netherlands
NEN |
Taiwan
- |
Luxembourg
- |
COPANT
- |
SJG300 |
SCH30 |
300
JL300 |
FG300 |
GG30 |
FC300 |
FGG30 |
FG300 |
|
