Carbon Steel Alloy 12L14

  • Carbon Steel Alloy 12L14
  • General Characteristics

    AISI 12L14 low carbon leaded free cutting steel, bright drawn or smooth turned with a consistently excellent level of machinability. The lead improves machinability greatly with little effect on the mechanical properties.

    Typical Applications:  very heavily machined components or parts subject to low stress levels, low shock loading, limited forming and very limited welding.

  • Typical Chemical Composition

    Weight % C Mn P S Pb Fe
    minimum 0.85 0.040 0.26 0.15 97.91
    maximum 0.15 1.15 0.090 0.35 0.35 98.7
  • Physical Properties (Annealed condition)

    Characteristics English Metric
    Nominal density

    (68°F/20°C)

    0.284 lbs/in3 7.87 g/cm3
    Specific heat Typical Steel 0.113 BTU/lb – °F 472 J/KG- °K
    Coefficient of thermal

    expansion

    -32°F-68°F

    0°C -20°C

    6.39 micro in/in- °F 11.5 micro m/m- °K
    -32°F – 572°F

    0°C – 300°C

    6.78 micro in/in- °F 12.2 micro m/m- °K
    -32°F – 932°F

    0°C – 500°C

    7.72 micro in/in- °F 13.9 micro m/m- °K
    Thermal conductivity Typical Steel 30.0 Btu / ft-hr-°F 51.9 W/m – °K
    Electrical resistivity Typical Steel 174 nΩ ∙ m
  • Mechanical Properties (Minimum values)

    Condition Tensile Hardness Average machinabillity
    Ultimate strength Yield

    strength

    Elongation

    in 50 mm

    (2 in.),

    Reduction

    in area,

    HRB % of steel 1212 = 100%
    KSI MPa KSI MPa % % Min %
    Hot rolled 57 390 34 230 22 45 121
    Cold drawn 78 540 60 410 10 35 163 170
  • Specifications

    • ASTM – A29/29M, A108

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