QT700-2 ductile iron is a part with high strength, wear resistance, and low toughness (low plasticity).

Material name: Nodular cast iron

Grade: QT700-2

Standard: GB 1348-2009

●Characteristics and scope of application: It is a pearlite nodular cast iron with high strength, wear resistance and low toughness (low plasticity). It is suitable for parts with high strength requirements, such as crankshafts, camshafts, main shafts of some grinders, milling machines, lathes, ball mill gear shafts, and small hydraulic turbine main shafts of diesel engines and gasoline engines.

●Chemical composition:

Carbon C: 3.08～3.30

Silicon Si: 2.49～3.13

Manganese Mn: 0.55～0.61

Sulfur S: 0.017～0.022

Phosphorus P: 0.045～0.052

●Mechanical properties:

Tensile strength σb (MPa): ≥700

Conditional yield strength σ0.2 (MPa): ≥420

Elongation δ (%): ≥2

Hardness: 225～305HB

● Heat treatment specification and metallographic structure: Heat treatment specification: (to be determined by the supplier, the following is the heat treatment specification of a sample for reference) 800℃, normalizing Metallographic structure: graphite + pearlite + a small amount of ferrite