Machining DataSheet for

General Information:
Material GroupP - Steel
Sub-GroupCarbon Steel
Tensile Strength630-800 [N/mm^2]

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Machining Steel 1045

SAE 1045 is a carbon steel produced to a range of 0.43–0.50% carbon and 0.60–0.90% Manganese it is primarily used in gears, shafts, axles, studs, and other machine parts. It is a popular alloy because of the good balance between machinability and mechanical properties.

Hardness levels of 1045 steel:

  • 160 HB - Hot Rolled
  • 165 – 200 HB - Cold Drawn.

  • The average machinability rating of SAE 1045 is around 65% (Annealed condition).
    You can find here a list of machinability Ratings for different Carbon Steels.


  • For turning operations on 1045, it is best to use inserts with thick CVD coating over a medium-hard substrate. For milling, any all-around carbide grade is suitable.
  • For detailed carbide grades recommendations, check the Below Chart, or use the Grades Wizrad.
  • Recommended Cutting speed range for turning at stable conditions is 790 - 1080 [SFM] / 240 - 330 [m/min].
  • Recommended Cutting speed range for milling with stable clamping and short overhang is 490 - 670 [SFM] / 150 - 205 [m/min]
  • For detailed cutting speed recomendations, check the Below Table, or use our Speed and Feed Calculator.

  • Equivalent International Designations for Steel 1045

    Standard Name

    Chemical Composition for Steel 1045

    Element Amount
    Manganese (Mn).60-.90%
    Carbon (C).43-.50%
    Sulfur (S)0.05%
    Phosphorus (P)0.04%

    Cutting Speeds Recomendations for Steel 1045

    * Click on the speeds below for higher precision in specific conditions!

    ApplicationVc (m/min)Vc (SFM)

    Important! The speed estimation is given for an ideal situation:

    • Most suitable carbide grade
    • Stable tool clamping
    • Stable workpiece clamping
    • Good quality raw material
    • A short overhang of the cutting tool.
    • Nominal hardness of the material.
    • etc.
    Click on the speeds in the above table to get better precision for specific parameters
    Or use our Speed and Feed Calculator

    Recommended Carbide Grades for Steel 1045

    * If you do nott understand the below table? Read This Explanation to make the most out of it!

    Grade for Turning

    Grade for Parting Off

    Grade for Grooving

    Grade for Milling (Indexable)

    Recommended Insert Cutting Edge Geometry for Steel 1045

    Honing Size:0.05-0.08 mm / 0.002-0.003"
    Rake Angle:11° -13°
    Land Angle:Positive
    Land Width:0.20-0.30 mm / 0.008-0.012"

    Learn more about carbide inserts Cutting-Edge Geometry Parameters.

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