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Name:1045 steel
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Brief introduction: 1045 steel
Equivalent Material Grades in Other International Standards: Equivalent grade of this type in US and Australian standards are 1045 In JIS designation, the corresponding material is referred as S45C. In European numeric designation it is 1.1191 steel
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Steel C45 Round Bar is an unalloyed medium carbon steel, which is also a general carbon engineering steel. C45 is a medium strength steel with good machinability and excellent tensile properties. C45 round steel is generally supplied in the black hot rolled or occasionally in the normalised condition, with a typical tensile strength range 570 – 700 Mpa and Brinell hardness range 170 – 210 in either condition. It does not however respond satisfactorily to nitriding due to a lack of suitable alloying elements.

C45 round bar steel is equivalent to EN8 or 080M40. Steel C45 bar or plate is suitable for the manufacture of parts such as gears, bolts, general-purpose axles and shafts, keys and studs.


1. Supply Range of Steel C45 Round Bar

  • C45 Steel Round Bar: diameter 8mm – 3000mm
  • C45 Steel Plate: thickness 10mm – 1500mm  x width 200mm – 3000mm
  • C45 Steel Flat Bar: 200mm – 1000mm
  • Square C45 Steel: 20mm-800mm
  • Hexagon Steel.

Surface Finish: Black, Rough Machined, Turned or as per given requirements.

Typical applications of C45 grade steel

  • Axles
  • Spindles
  • Studs
  • Shafts
  • Knives
  • Automotive components 
  • General engineering components

The Di-value is in inches.

Other properties (typical values)

Youngs module (GPa) Poisson´s ratio (-) Shear module (GPa) Density (kg/m3)
210 0.3 80 7800
 Average CTE 20-300°C (µm/m°K)  Specific heat capacity 50/100°C (J/kg°K)  Thermal conductivity Ambient temperature (W/m°K)  Electrical resistivityAmbient temperature (µΩm)
 12  460 - 480  40 - 45  0.20 - 0.25


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