Steel Alloy Maraging 300

  • Steel Alloy Maraging 300

  • General Characteristics

    Maraging 300 VIM-VAR is a low carbon maraging steel capable of 270,000 psi minimum yield strength, coupled with excellent toughness and ductility. The alloy has good fabrication characteristics, which include a low rate of work hardening, good machinability and weldability, and a very simple heat treatment process. Maraging 300 is produced by vacuum induction melting followed by VAC-ARC remelting. This approach provides superior cleanness and a preferred ingot structure to enhance transverse mechanical properties. Maraging 300 is supplied in the solution annealed condition.

  • Typical Chemical Composition

    Weight % C Si Mn Ni Co Mo Ti Al Fe
    Typical

    Analysis

    		 0.01 0.10 0.10 18.50 9.00 4.80 0.65 0.10 Remainder

  • Physical Properties

    Characteristics English Metric
    Nominal density

    (68°F/20°C)

    		 0.289 lbs/in3 8.00 g/cm3
    Coefficient of thermal

    expansion

    		 75°F – 900°F

    23.9°C – 482°C

    		 5.60 micro in/in- °F 10.1 micro m/m- °K

  • Mechanical Properties – Typical Transverse Tensile Properties

    Tensile

     
    Ultimate Yield Elongation

    at break

    		 Reduction of

    area
    Size Tested in (mm) Speciman Orientation KSI MPa KSI MPa % %
    10 (254) OCT Transverse 297 2050 284 1960 6.8 30
    6.25 (159) RD Transverse 304 2095 287 1980 7.8 33
    5  (127)   RCS Transverse 299 2060 285 1965 7.8 38
    3.75   (95) RD Longitudinal 300 2070 289 1995 9.0 50
    2.5     (64) RD Longitudinal 294 2025 280 1930 11.3 52
    1        (25) RD Longitudinal 299 2060 284 1960 10.9 54

  • Specifications

    • AMS – 6521
    • Military Specifications – MIL-S-46850D
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