Stainless steel

AISI 440A
1.4109

In hardened condition, this metal has an exceptional wear resistance.

Key benefits

  • Well used for ball bearings

  • Medical instruments, dentals

Standards

  • ASTM F899

Forms available in stock

Diameter
  • 2 to 50 mm
Length
  • 3000 mm around

Chemical composition

Reference standard : ASTM F899
C
  • 0,6% min
  • 0,75% max
Si
  • 0% min
  • 1% max
Mn
  • 0% min
  • 1% max
P
  • 0% min
  • 0,04% max
S
  • 0% min
  • 0,03% max
Cr
  • 16,00% min
  • 18,00% max
Mo
  • 0% min
  • 0,75% max
Cu
  • 0% min
  • 0,5% max
Fe
  • Balance
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Mechanical properties

Rm (Mpa) (according to diameter)
750 - 900
Rp 0,2 (Mpa)
420
Density (g/cm3)
7,75
A (%)
20