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The followings are the characters, application, chemical composition and equal grades of DIN 1691 GG20.
Characteristics of DIN 1691 GG20 Gray Cast Iron:
DIN 1691 GG20 Gray Cast Iron offers exceptional machinability and is extremely resistant to heat and corrosion. This material is also easy to finish and extremely effective at damping both sound and vibration. The strength and abrasion resistance of this material are limited.
Common Application for DIN 1691 GG20 Gray Cast Iron:
Requirements withstand greater load and a certain degree of tightness or corrosion resistance of the more important castings such as cylinder, gear, base, flywheels, bed, cylinder block, cylinder liner, piston, gear box, brake wheel, coupling plate, medium pressure value, etc.
Standards / Designations
Country |
Standard |
Material Grade |
|
ISO |
ISO 185 |
GRADE 200 |
|
China |
GB 9439 |
HT200 |
|
USA |
ASTM A48 |
CLASS 30 |
|
Germany / Austria |
DIN 1691 |
GG20 |
|
European |
EN 1561 |
EN-GJL-200 |
|
Japan |
JIS G5501 |
FC200 |
|
Italy |
UNI 5007 |
G20 |
|
France |
NF A32-101 |
FGL200 |
|
UK |
BS 1452 |
180, 200, 220 |
|
Spain |
UNF |
FG20 |
|
Belgium |
NBN 830-01 |
FGG20 |
|
Australia |
AS 1830 |
T200, T220 |
|
Sweden |
SS 14 01 |
O120 |
|
Norway |
NS11 100 |
SJG200 |
Chemical Composition of DIN 1691 GG20 Gray Cast Iron:
Carbon |
C |
3.20-3.40 |
[%] |
|
Silicon |
Si |
2.10-2.30 |
[%] |
|
Manganese |
Mn |
0.5-0.8 |
[%] |
|
Sulphur |
S |
0.12 max. |
[%] |
|
Phosphorus |
P |
0.40 max. |
[%] |
|
Iron |
Fe |
Balance
|
|
As for normal grey iron, the chemical composition is not important comparatively. The iron foundries could adjust the compositions according to their experience as long as they could meet the physical and mechanical requirements.
Mechanical Properties of DIN 1691 GG20 Gray Cast Iron:
Tensile strength |
σ B |
200 |
[N/mm2] |
|
Elongation |
A |
0.3-0.8 |
[%] |
|
Permanent limit of elongation |
σ bB |
400 |
[N/mm2] |
|
Compressive Strength |
σ dB |
800 |
[N/mm2] |
|
Brinell hardness |
HB30 |
170-210 |
[Kg/mm2] |
|
Elasticity modulus |
Eo |
100 |
[kN/mm2] |
|
Shear stress |
σaB |
230 |
[N/mm2] |
|
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