• FREE CUTTING STEELS    EN 10277-3


     
    Steel Code 


    Chemical Composition, weight %


    Name


    No

    C
    %

    Si 
    %

    Mn
    %

    P
    ≤ %

    S
    ≤ %

    Pb
    %


    Steels where no heat treatment will be applied


     11 SMn30


    1.0715


    ≤ 0.14


    ≤ 0.05


    0.90 - 1.30


    ≤ 0.11


    0.27 - 0.33


    -


    11SMnPb30


    1.0718


    ≤ 0.14


    0.05


    0.90 - 1.30


    ≤ 0.11


    0.27 -0.33


    0.22 - 0.35


    11SMn37


    1.0736


    ≤ 0.14


    0.05


    1.00 - 1.50


    0.11


    0.34 - 0.40


    -


    11SMnPb37


    1.0737


    ≤ 0.14


    0.05


    1.00 - 1.50


    0.11


    0.34 - 0.40


    0.20 - 0.35


    Case hardening steels


    10S20


    1.0721


    0.07 - 0.13


    ≤ 0.40


    0.70 - 1.10


    0.06


    0.15 - 0.25


    -


    10SPb20


    1.0721


    0.07 - 0.13


    ≤ 0.40


    0.70 - 1.10


    0.06


    0.15 - 0.25


    0.20 - 0.35


    15SMn13


    1.0725


    0.12 - 0.18


    ≤ 0.40


    0.90 - 1.30


    0.06


    0.08 - 0.18


    -


    Directly hardening steels


    35S20


    1.0726


    0.32 - 0.39


    ≤ 0.40


    0.70 - 1.10


    0.06


    0.15 - 0.25


    -


    35SPb20


    1.0756


    0.32 - 0.39


    ≤ 0.40


    0.70 - 1.10


    0.06


    0.15 - 0.25


    0.15 - 0.35


    36SMn14


    1.0764


    0.32 - 0.39


    ≤ 0.40


    1.30 - 1.70


    0.06


    0.10 -0.18


    -


    36SMnPb14


    1.0765


    0.32 - 0.39


    ≤ 0.40


    1.30 - 1.70


    0.06


    0.10 - 0.18


    0.15 - 0.35


    38SMn28


    1.0760


    0.35 - 0.40


    ≤ 0.40


    1.20 - 1.50


    0.06


    0.24 - 0.33


    -


    38SMnPb28


    1.0761


    0.35 - 0.40


    ≤ 0.40


    1.20 - 1.50


    0.06


    0.24 - 0.33


    0.15 - 0.35


    44SMn28


    1.0762


    0.40 - 0.48


    ≤ 0.40


    1.30 - 1.70


    0.06


    0.24 - 0.33


    -


    44SMnPb28


    1.0763


    0.40 - 0.48


    ≤ 0.40


    1.30 - 1.70


    0.06


    0.24 - 0.33


    0.15 - 0.35


    46S20


    1.0727


    0.42 - 0.50


    ≤ 0.40


    0.70 - 1.10


    0.06


    0.15 - 0.25


    -


    46SPb20


    1.0757


    0.42 - 0.50


    ≤ 0.40


    0.70 - 1.10


    0.06


    0.15 - 0.25


    0.15 - 0.35


     Acceptable Tolerances Between Specified Analysis and Fragment Analysis

    Element


    The highest Acceptable Content According to the Pot, weight %


    Acceptable Deviation %


    C


    > 0.30


    ≤ 0.30
    ≤ 0.50


    ± 0.02
    ± 0.03


    Si


    > 0.05


    ≤ 0.05
    ≤ 0.40


    + 0.01
    + 0.03



    Mn



    > 1.00



    ≤ 1.00
    ≤ 1.70



    ± 0.04
    ± 0.06


    P


    > 0.06


    ≤ 0.06
    ≤ 1.70


    + 0.008
    + 0.02


    S


    > 0.33


    ≤ 0.33
    ≤ 0.40


    ± 0.03
    ± 0.04


    Pb

     


    ≤ 0.35


    + 0.03
    - 0.02

     

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