APX Martensitic stainless steels

  • Aerospace
  • Industrial
  • Medical
  • Tooling

Spécifications

  • Common name
    431
  • EU
    X17CrNi16-2
  • USA
    UNS:
    S43100
    AISI:431

Typical composition

  • C
    0,16
  • Ni
    2
  • Cr
    17

Applications

• Nuclear energy.
• Aerospace industry, marine applications.
• Chemical, oil and steam industries.
• Plastics processing industry.
• For the manufacture of welded parts, please use our APX4 steel.

Mechanical properties

• Martensitic stainless steel, equivalent to 13 % chromium steel in terms of corrosion.
• Resistant to sea water, saline atmosphere and salt spray.
• Very good resistance to organic acids and some mineral acids.
• Very suitable where a high polish is required.

Mechanical features

  • Heat treatment
    T + Rv 400°C
    T + Rv 630°C
  • UTS (N/mm²)
    1400
    1000
  • A (%)
    13
    15
  • KCU (J/cm²)
    -
    40
  • Solution treated : H
    Annealed : R
  • Thermo-mechanical treatment : TM
    Quenched and tempered : T+RV
  • Sub-zero treatment : F
    Solution treated and aged : T+RV
APX_FR
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See also

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