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NC40SW Through hardening steels

  • Aerospace

Spécifications

  • Common name
    300M
  • EU
    40NiSiCrMo7
  • USA
    UNS:K44220

Typical composition

  • C
    0,4
  • Ni
    1,8
  • Cr
    0,85
  • Mo
    0,4
  • Si
    1,6

Applications

• Shafts.
• Gears.
• Various mechanical parts.
• Heavily stressed aerospace parts.

Mechanical properties

• Melting: consumable electrode remelted steel.
• High mechanical properties.
• Good resistance to impact and fatigue.
• Maintains good properties at high temperatures.

Mechanical features

  • Heat treatment
    T + Rv 600°C
    T + 2xRv 300°C
  • UTS (N/mm²)
    1450
    2050
  • A (%)
    14
    12
  • KCU (J/cm²)
    60
    50
  • Solution treated : H
    Annealed : R
  • Thermo-mechanical treatment : TM
    Quenched and tempered : T+RV
  • Sub-zero treatment : F
    Solution treated and aged : T+RV
NC40SW_GB
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See also

819AW

  • Aerospace
  • Defense
  • Tooling
  • Transportation
Through hardening steels
  • Gun barrels
  • Missiles
  • Plastic
  • Polishing
  • Transmission system
Spécifications
  • EU : 35NiCrMo16
  • USA : UNS : K57034
Heat treatment
  • T + F + Rv 200°C
  • T + Rv 650°C
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