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AISI 1050 Suppliers - ASSAB 760 , 1.1191 , S50C Carbon Steel PlateAISI 1050 steel is a medium-carbon, cold rolled steel containing approximately 0.50% carbon that can be hardened by heat treatment to a maximum hardness of approximately Rockwell C 58.
Soft annealed high carbon steel is intended for applications requiring moderate forming, while soft spheroidized annealed product is intended for applications requiring maximum cold forming.
This grade of steel is used for the manufacture of blades, brackets, brake discs, clips, clutches, springs, washers and gears and for a wide range of applications that can make use of its good combination of mechanical properties.
Chemical Composition of Carbon steel S50C / 760 Plate
Chemical Composition (%) limits of AISI 1050 carbon steel per ASTM A684*
Mechanical Properties of Medium Carbon Steel 1050 / S50C
|Tensile strength||690 MPa||100000 psi|
|Yield strength||580 MPa||84100 psi|
|Shear modulus (typical for steel)||80 GPa||11600 ksi|
|Bulk modulus (typical for steel)||140 GPa||20300 ksi|
|Elastic modulus||190-210 GPa||27557-30458 ksi|
|Elongation at break (in 50 mm)||10%||10%|
|Reduction of area||30%||30%|
|Hardness, Rockwell C (converted from Brinell hardness. Value below normal HRC range, for comparison purposes only)||13||–|
|Hardness, Knoop (converted from Brinell hardness)||219||219|
|Hardness, Rockwell B (converted from Brinell hardness)||92||92|
|Hardness, Rockwell C (converted from Brinell hardness. Value below normal HRC range, for comparison purposes only)||13||13|
|Hardness, Vickers (converted from Brinell hardness)||207||207|
Heat Treatment of Carbon Steel ASSAB 760
Full annealing of small C1050 forgings is carried out from 1450-1600ºF (790-870ºC) followed by furnace cooling at 50ºF (28ºC) per hour, to 1200ºF (650ºC) soaking and air cooling.
The normalizing temperature range for this grade is typically 1650-1700ºF (900-925ºC.)
Normalizing is followed by cooling in still air. When forgings are normalized before hardening and tempering or other heat treatment, the upper range of the normalizing temperature is used. When normalizing is the final treatment, the lower temperature range is used.
Hardening of this grade is carried out from an austenitizing temperature of 1500-1600ºF (820-870ºC) followed by oil or water quenching.
Flame and induction hardening may be carried out by heating quickly to the desired case depth and quenching in water or oil. This should be followed by a tempering treatment at 300-400ºF (150-200ºC) to reduce stresses in the case, without affecting its hardness. A surface hardness as high as Rc 61 may be obtained from C1050 by this treatment.
Tempering after normal hardening and oil or water quenching is carried out at 750-1260º F (400-680ºC) to give the required mechanical properties as determined by practical experience.
Machinability of C1050 is good providing the full annealing cycle described above is used, A coarse lamellar pearlite to coarse spheroidite microstructure gives optimum machinability in C1050.
This grade is readily welded with the correct procedure. Welding in the through-hardened or flame or induction-hardened conditions is not recommended.
Low-hydrogen electrodes are recommended together with preheat at 300-800ºF (150-430ºC to be maintained during welding, Cool slowly in sand or ashes and stress relieve where possible. It may be that in certain instances normalizing may be called for after welding.
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