Difference between 1018 steel and 1045 steel

1018 steel vs 1045 steel

Property1018 Steel1045 Steel
Carbon (C) Content0.15 – 0.20%0.43 – 0.50%
Manganese (Mn) Content0.60 – 0.90%0.60 – 0.90%
Phosphorus (P) Content0.04% max0.04% max
Sulfur (S) Content0.05% max0.05% max
Mechanical Properties
  
Yield StrengthAround 370 MPa
Around 450 MPa
Tensile StrengthAround 440 MPa
Around 650 MPa
Elongation at BreakAround 20%Around 12%
Hardness, BrinellApproximately 120
Approximately 180
Machinability Rating0.70.64
WeldabilityExcellentModerate
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