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DIN 1693 GGG40 is a ductile iron grade of Germany standard, which is equal to QT400, 60-40-18, 60-40-15, FCD400, GS400-12, FGS400-12, 400/17, 420/12, 400-12, 400-18, SG38 and SG40.
Our Dandong Foundry has produced DIN 1693 GGG40 ductile iron castings for many years, and herein, we introduce its mechanical and chemical properties and some iron castings made by this material grade.
The Chemical Properties of DIN 1693 GGG40 ductile cast iron
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.
Chemical composition in % for DIN 1693 GGG40 ductile cast iron |
C |
Si |
Mn |
P |
S |
Mg |
RE |
3.50~3.60 |
3.00~3.20 |
0.50 |
≤0.07 |
≤0.02 |
0.04 |
0.02 |
The Physical and Mechanical Properties of DIN 1693 GGG40 ductile cast iron
Material Property |
Values |
Melting Temperature |
1150 - 1250 ℃ |
Service Temperature |
-100 - 400 ℃ |
Density |
7.1 - 7.3 g/cm³ |
Young's Modulus, E |
167 - 170 GPa |
Yield Strength, σy |
250 MPa |
Tensile Strength, σts |
400 MPa |
Elongation (%) |
≥ 15 |
Poisson's Ratio |
0.21 - 0.26 |
Fracture Toughness, KIC (plane-strain) |
22 - 54 MPa/√m |
Thermal Conductivity, λ |
25 - 42 W/m.K |
Thermal Expansion, α |
10 - 11.5 E-6/C |
Production Energy |
16.4 - 18.2 MJ/kg |
CO2 Emission |
1 - 1.1 kg/kg |
Fire Resistance |
Excellent |
Fresh Water Resistance |
Good |
Salt Water Resistance |
Average |
Sunlight/UV Resistance |
Excellent |
Wear Resistance |
Excellent |
Important Note:
As the material property values are generalized figures only for quick reference and may only be applicable to certain test conditions. Thus, it is normal if you find the figures different from other reference sources that are based on a different set of test conditions.
The Application of DIN 1693 GGG40 ductile cast iron:
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. |
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