What material does the German casting standard GGG50 GGG60 correspond to the national standard?

GGG50 is equivalent to the domestic QT500-7

GGG60 is equivalent to the domestic QT600-3

qt500-7

Characteristics and scope of application: It is ferritic ductile iron.

The strength and toughness are medium, and the machinability is good. At low temperature, the toughness changes to brittleness, but the low temperature impact value is higher, and there is a certain resistance to temperature abrupt change and corrosion. It is widely used in oil pump gears for internal combustion engines, medium temperature cylinder partitions for steam turbines, valve bodies for water turbines, and bearings for railway rolling stock.

Machine seat frame drive shaft.

Wait. Chemical Composition: Carbon C: Ductile iron plate.

Silicon Si: Manganese Mn: Sulfur S: Phosphorus P: Mechanical Properties: Tensile Strength.

b (mpa): 500 conditional yield strength.

MPa): 320 Elongation δ 7 Hardness: 170 230HB Heat Treatment Specification and Metallographic Structure:

qt600-3

Material Name: Ductile Iron Grade: QT600-3 Standard:

GB 1348-88 characteristics and scope of application: It is a pearlitic ductile iron, which has the characteristics of medium and high strength, medium toughness and plasticity, high comprehensive performance, good wear resistance and vibration damping, and good casting process performance. Its properties can be changed by various heat treatments.

It is mainly used for various power machinery crankshafts and camshafts.

Connecting shafts, connecting rods, gears, clutch plates, hydraulic cylinder blocks and other parts Chemical composition: Carbon C : Silicon Si:

Manganese mn: sulfur s: phosphorus p:

Magnesium mg: Note: Mechanical properties:

Tensile Strength b (MPa): 600 Conditional Yield Strength MPa): 370 Elongation δ 3 Hardness:

190 270HB heat treatment specification and metallographic structure: Heat treatment specification: (determined by the supplier, the following is the heat treatment specification of a sample, for reference) 930, 2h normalizing.

Air-cooled, 600 ,2h, tempered air-cooled, metallographic structure: pearlite, ferrite.

GGG50 corresponds to domestic QT500-7

GGG60 corresponds to the domestic QT600-3

GGG70L is equivalent to the national standard ductile iron QT700L

German grade GGG70L ductile iron is currently the most used deep-drawing die material, its tensile strength requirements of 700MPa, the letter L represents the addition of alloying elements Ni, usually also contains a certain amount of alloying elements Cu and Mo.