Grey cast iron
GB National Standard:
HT100, HT150, HT200, HT250, HT300, HT350
FC100, FC150, FC200, FC250, FC300, FC350
GC100, GC150, GC200, GC250, GC300, GC350
NO.20, NO.25, NO.30, NO.35, NO.40, NO.45, NO.50, NO.55, NO.60
UNS United States
F11401, F11701, F12101, F12801, F13101, F14101
QT400-18, QT400-15, QT450-10, QT500-7, QT600-3, QT700-2, QT800-2 QT900-2
FCD350-22, FCD400-18, FCD400-15, FCD450-10, FCD500-7, FCD600-3 FCD700-2, FCD800-2
GCD370, GCD400, GCD450, GCD500, GCD600, GCD700, GCD800
60-40-18, 65-45-12, 80-55-06, 100-70-03, 120-90-02
F32800, F33100, F33800, F34800, F36200
Ductile iron bar/cast iron casting / ductile iron cast
QT500-7 characteristics and scope of application:
It is ferric ductile iron, medium strength and toughness, good machinability. At low temperature, toughness changes to brittleness, but low temperature impact value is higher, and has a certain temperature resistance and corrosion resistance. It is widely used in oil pump gear of internal combustion engine, temperature cylinder bulkhead of steam turbine, valve body of hydraulic turbine, bearing bush of railway locomotive and vehicle, transmission shaft of machine seat frame and so on.
QT500-7 Chemical composition:
Carbon C: 3.6-3.8
Silicon Si: 2.5~2.9
Manganese Mn lt; 0.6
Sulfur S lt; 0.025
P P lt; 0.08
Magnesium Mg: 0.03-0.05
The content of rare earth RE was 0.03-0.05
Tensile strength σb (MPa) : ≥500
Conditional yield strength σ0.2 (MPa) : ≥320
Elongation δ(%) : ≥7
Hardness: 170 ~ 230HB
Heat treatment specification:
(determined by the Supplier, the Following is the Heat Treatment Specification of a Sample, for Reference) 920℃
Ferrite + Pearlite.
In Order to Improve the Surface Hardness, Wear Resistance and Fatigue Strength of Some Castings, Surface Quenching Can Be Used.
Gray Cast Iron and Ductile Iron Castings Can Be Surface Quenched. Generally, High (medium) Frequency Induction Heating Surface
Quenching and Electrical Contact Surface Quenching Are Used.
Chemical Heat Treatment
For Castings That Require Surface Wear Resistance or Oxidation Resistance and Corrosion Resistance, Chemical Heat Treatment
Processes Similar to Steel Can Be Used, Such As Gas Soft Chlorination, Chlorination, Boronizing, Sulfurizing and Other Treatments.
Customized according to requirements