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S50C

S50C

AISI 1050 is a high-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. The soft spheroidized annealed product is processed to give the lowest hardness for maximum formability. 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

Chemical Composition (wt%) limits of AISI 1050 per ASTM A684*

Element AISI 1050
Carbon 0.48-0.55
Manganese 0.60-0.90
Phosphorus 0.030
Sulfur 0.035

 

Physical Properties

The following table shows the physical properties of AISI 1050 carbon steel.

Properties Metric Imperial
Density 7.85 g/cm3 0.284 lb/in3

 

Mechanical Properties

The mechanical properties of the cold drawn AISI 1050 carbon steel are outlined in the following table.

Properties Metric Imperial
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
Poisson’s ratio 0.27-0.30 0.27-0.30
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, Brinell 197 197
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

 

Thermal Properties

The thermal properties of AISI 1050 carbon steel are given in the following table. Properties Metric Imperial

Properties Metric Imperial
Thermal conductivity (typical steel) 49.8 W/mK 346 BTU in/hr.ft2.°F