FG20 is a low grade of gray cast iron according to Spain standard UNE, it is equivalent to EN-GJL-200 in European standard EN 1561.
The followings are the chemical composition, mechanical properties and physical properties for UNE FG20 that we summarize according to EN-GJL-200.
The Chemical Composition for UNE FG20 Gray Cast Iron:
The chemical components of FG20 grade include C: 3.10-3.40%, Si: 1.90-2.30%, Mn: 0.60-0.90%, P ≤ 0.15%, S ≤ 0.15%. CE: 3.90-4.15. 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.
The Mechanical Properties for UNE FG20 Gray Cast Iron:
Mechanical properties (measured on separately cast test pieces, Ø 30mm) |
Material designations as per UNE |
FG20 |
Matrix |
|
Pearlite |
Tensile strength |
N/mm2 |
200 to 300 |
Brinell hardness |
HBW |
150 to 230 |
0.1% proof strength |
N/mm2 |
130 to 195 |
Elongation to fracture |
% |
0.8 to 0.3 |
Compressive strength |
N/mm2 |
720 |
Flexural strength |
N/mm2 |
290 |
Modulus of elasticity (load-dependent) |
kN/mm2 |
88 to 113 |
Fatigue strength under reversed bending stress |
N/mm2 |
90 |
Compression-tention fatigue strength |
N/mm2 |
50 |
Fracture toughness |
MPa√m |
17 |
The Physical Properties for UNE FG20 Gray Cast Iron:
Physical properties |
Material designations as per UNE |
FG20 |
Density |
kg/dm3 |
7.15 |
Specific heat capacity |
J/(kg · K) |
20 - 200 °C: 460 20 - 600 °C: 535 |
Coefficient of thermal expansion |
10-6 K-1 |
20 - 200 °C: 11.720 - 400 °C: 13.0 |
Thermal conductivity (100 - 500 °C) |
W/(m · K) |
50.0 – 46.0 |
Electrical resistivity |
µΩ · m |
0.77 |
Worldwide equivalents of grade FG20 (Spain: UNE)
Spain
UNE |
EU
EN |
USA
- |
Germany
DIN,WNr |
Japan
JIS |
France
AFNOR |
England
BS |
Italy
UNI |
Belgium
NBN |
FG20 |
EN-GJL-200 (EN-JL1030) |
200/225
25B
30
30B |
0.6020
GG20 |
FC200 |
FGL200
Ft20D |
180
200/220
220
Grade180
Grade260 |
G20 |
FGG20 |
China
GB |
Sweden
SS |
Bulgaria
BDS |
Hungary
MSZ |
Poland
PN |
Romania
STAS |
Austria
ONORM |
Australia
AS |
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 |
|
