Mat.No. 1.1170, DIN 28Mn6, AISI 1330

Mat.No. 1.1170, DIN 28Mn6, AISI 1330

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Designation by Standards Mat. No. DIN EN AISI 1.1170 28Mn6 - 1330 Chemical Composition (in weight %) C Si Mn Cr Mo Ni V W Others 0.28 max. 0.40 1.48 max. 0.40 max. 0.10 max. 0.40 - - (Cr+Mo+Ni)=max. 0.63 Description Manganese steel for moderate and lower temperature use in pressure vessels. Applications Used for weld fabrication of pressure vessels that require improved notch toughness for lower than ambient temperature service. Low and moderately stressed parts for vehicles, ...


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    Designation by Standards

    Mat. No. DIN EN AISI
    1.1170 28Mn6 - 1330

    Chemical Composition (in weight %)

    C Si Mn Cr Mo Ni V W Others
    0.28 max. 0.40 1.48 max. 0.40 max. 0.10 max. 0.40 - - (Cr+Mo+Ni)=max. 0.63

    Description Manganese steel for moderate and lower temperature use in pressure vessels. Applications Used for weld fabrication of pressure vessels that require improved notch toughness for lower than ambient temperature service. Low and moderately stressed parts for vehicles, machines and engines.  Physical properties (avarage values) at ambient temperature Modulus of elasticity [103 x N/mm2]: 210  Density [g/cm3]: 7.83 Soft Annealing This will produce a maximum Brinell hardness of 223. Normalizing Normalizing temperature: 850-890oC. Stress Relieving Stress relieving to remove machining stresses should be carried out by heating to approx. 650oC, holding for 1-2 hours at heat, followed by air cooling. This operation is performed to reduce distortion during heat treatment. Hardening Harden from a temperature of 830-870oC followed by water or oil quenching. Tempering Tempering temperature: 540-680oC Mechanical Properties in Normalized Condition

    Diameter (mm) 0.2 % proof stress min.(N/mm2) Tensile strength min. (N/mm2) Elongation min.(%)
    up to 16 345 630 17
    17-40 310 680 18
    41-100 290 590 18

    Mechanical Properties in Quenched and Tempered Condition

    Diameter (mm) 0.2 % proof stress min. (N/mm2) Tensile strength min. (N/mm2) Elongation min.(%) Reduction of area min. (%) Notch impact energy (ISO-V) min. (J)
    up to 16 590 800-950 13 40 35
    17-40 490 700-850 15 45 40
    41-100 440 650-800 16 50 40
    101-160 390 590-740 18 - -
    161-250 390 590-740 18 - -
    251-500 340 540-690 19 - -

    Hardenability Diagram Hardenability in the end-quench test Quenching temperature in the end-quench test is 850oC

    Hardness 1.5 3 5 7 9 11 13 15 20 25 30 35 40 45 50
    H max. 54 53 51 48 44 41 38 35 31 29 27 26 25 25 24
    H min. 45 42 37 27 21 - - - - - - - - - -
    HH max. 54 53 51 48 44 41 38 35 31 29 27 26 25 25 24
    HH min. 48 46 42 34 30 27 24 21 - - - - - - -
    HL max. 51 49 46 41 35 32 29 22 20 - - - - - -
    HL min. 45 42 37 27 21 - - - - - - - - - -

    Forging Hot forming temperature: 1050-850oC.  Machinability Machinability of this steel is good. Disclaimer The information and data presented herein are typical or average values and are not a guarantee of maximum or minimum values. Applications specifically suggested for material described herein are made solely for the purpose of illustration to enable the reader to make his own evaluation and are not intended as warranties, either express or implied, of fitness for these or other puposes. There is no representation that the recipient of this literature will receive updated editions as the become available.

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