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Cast Iron GGG40 - Ductile Iron
Cast iron GGG40 is a low grade of ductile
iron. Our foundry has produced this material for many years, and
herein, we introduce its mechanical and chemical properties and some
iron castings made by this
material grade.
GGG40 is a ductile iron grade of Germany standard, which is equal to
QT400, ASTM A536 60-40-18,
60-40-15, FCD400, GS400-12, FGS400-12, 400/17, 420/12, 400-12,
400-18 and SG38, SG40.
The Mechanical Properties of GGG40
Actually, GGG40 includes 3 types of grades. By European standard
EN 1563,
they should be EN-GJS-400-15, EN-GJS-400-18, and EN-GJS-400-18LT.
Their main mechanical properties are as followings:
|
Grades |
Tensile Strength
(Mpa) |
Elongation (%) |
Impact Resistance
(J) |
|
EN-GJS-400-15 |
≥
400 |
≥
15 |
Not Specified |
|
EN-GJS-400-18 |
≥
400 |
≥
18 |
Not Specified |
|
EN-GJS-400-18LT |
≥
400 |
≥
18 |
12J at -20°C |
"LT" means for low temperature.
However, if your clients did not denote the specific requirements to
the elongation and impact resistance, then the
iron foundries should meet
the lowest requirements of min. 400 Mpa tensile strength and min.
15% elongation.
The Chemical Properties of GGG40
Normally, the clients will not require the chemical composition, and
in international standards, such as ISO 1083, ASTM A536, DIN 1693,
UNI 4544 and AS 1831, there are no mandatory stipulation to the
chemical composition. Actually, from different standards, their
suggested chemical compositions are very different, but all of them
denoted that the chemical composition should just be reference, and
will not be taken as quality inspection standard.
Of course, if you need to stipulate the chemical composition to meet
the special application, then you should denote the allowable
chemical element range on the drawings or in your requirements.
The Application of GGG40
GGG40 is a very good material grade of
ductile iron, which has good tensile strength and yield
strength, and especially very high elongation rate. The higher grade
will mean the lower elongation, so GGG40 has the highest elongation
rate in all ductile iron grades.
This material is suitable for many industrial and civil fields. Such
as automotive castings, truck and agricultural parts, various
machinery casting parts, manhole covers, even for pump and valve
parts.
The following casting parts were produced by
Dandong Foundry in China.
Pipe Clamp
Tractor Axle Support
Truck Cradle Support
Large Belt Pulley
Vehicle Iron Bracket
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