S45C steel Japanese standard JISG4051-79 (94), high quality carbon steel, the oxygen converter steelmaking furnace and open hearth furnace or full steel made static, the steel microstructure is uniform, without tissue defects. The carbon content of the steel is above 0.4%, the abrasion resistance is good, but the ductility is reduced, and the quenching is easy to deform and crack. Therefore, the heat treatment is extremely important, and after tempering, there is no need to quench, because there is no second kind of temper brittleness. The machinability of this kind of carbon steel can be improved by spheroidizing treatment of the steel.
S45C steel chemical composition:
P ﹤= 0.030
S﹤ = 0.035
Cu ﹤= 0.30
Ni﹤ = 0.20
Cr ﹤= 0.20
S45C steel mechanical property
Supply condition hardness
137~170HBS
167~229HBS
201~269HBS.
Tensile strength >686MPa
Yield strength >490MPa
Elongation of delta 5>17%
The shrinkage rate of >45% PSI
Impact toughness value >78J/cm2
Hardness 201~269HB.
S45C steel is widely used in mechanical manufacture. The steel has good mechanical properties. But this is a
medium carbon steel, and the hardenability is not good. No. 45 steel can be hardened to HRC42~46. Therefore, if the surface hardness is required and the superior mechanical performance of 45# steel is desired, the surface of 45# steel will be carburized and quenched so that the required surface hardness can be obtained.
S45C steel is used by electric furnace, open hearth or pure oxygen converter steelmaking static steel all produced, the steel microstructure is uniform, without tissue defects. S45C steel is a kind of medium carbon high quality steel with high strength. Because of poor hardenability, it is used in normalizing condition. When mechanical properties are higher, quenching and tempering are adopted. Cold deformation, medium plasticity, annealing and normalizing of machinability are better than quenching and tempering. Used to manufacture parts with higher strength requirements, such as gears, shafts, pistons, pins, etc., and mechanical parts, forgings, stampings and bolts, nuts and pipes that are not subjected to great stress.
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