Detailed description

1.Characteristics and application:

High strength, plasticity and toughness, its quench-hardening ability is good, overheating sensitivity, low than manganese steel than silicon, high manganese steel, decarburization than silicon manganese steel to small, big brittleness. Used for vehicles, tractor industry making heavy load, stress larger leaf-spring and larger diameter spiral spring.2.Chemical ingredients:

Carbon C: 0.56 ~ 0.64Si Si: 0.17 ~ 0.37Manganese Mn: 0.70 ~ 1.00Sulfur S: more than 0.030Phosphorus P: more than 0.030Chromium Cr: 0.70 ~ 1.00Ni Ni: more than 0.35Copper Cu: more than 0.25

3.Mechanical properties:

Tensile strength σ b (MPa) : frequency 1225 (125)Conditions yield strength σ 0.2 (MPa) : frequency 1078 (110)Elongation δ 5 (%) : quartile 9 (reference)Area reduction ψ (%) : 20 frequencyHardness: hot rolling, than 321 HB; Cold pull + heat treatment, than 321 HB4.Heat treatment standard and metallographic organization:

 Heat treatment specification: quenching 830 ~ 860 °C, the oil cold; Tempering 460 ~ 520 °C.5.Delivery status:

the hot rolling steel heat treatment or not heat treatment with state delivery, cold pull steel heat treatment with state delivery.   

60Cr3(1.7177) special steel