September 14, 2018

XD16N Bar

XD16N is a Nitrogen Martensitic Stainless Steel for corrosion, temperature, and wear resistance. This grade is an air-melt only, less costly version of XD15NW, yet still offers greatly superior corrosion resistance to 440C or 440C VAR.

FOR REQUIREMENTS:Stainless Bearing Steel, High-Nitrogen
MELT PRACTICE:Air-Melt
CORROSION RESISTANCE:Superior to 440C/EXCELLENT
ALTERNATIVE TO:440C/440C VAR or AMS 5749
SPECIFICATIONS:AMS5926
X50CrSiMnVN16-1
UNS : S42716

Benefits of XD16N

  • Significantly better corrosion resistance relative to 440C (X105CrMo17)
  • HRC of at least 58 after tempering at low (around 180°C) and high (500°C) temperatures
  • Low residual austenite after heat treatment in order to ensure a high dimensional stability of the parts
  • Capable of high temperature hardness, superior even to AMS 5749
  • Heat treatment is relatively simple, utilizing standard equipment
  • Cost effective alternative to XD15NW (non-flight critical applications)

Typical Applications

  • Gears
  • Valves
  • Injection systems
  • Cold work in corrosive environments
  • Blades and cutting tools

Comparison to Other Materials

The corrosion resistance is characterized with the following test:

• Salt spray test according to NF X 41-002

As shown in the pictures below, the corrosion resistance is significantly better when compared to the standard solution X105CrMo17 (440C, remelted in this case). Surface aspect after different salt spray (NaCl) exposure times.

Chemical Composition

 CSiMnCrMoVNNi
min.0.451.3015.000.200.200.05
max.0.601.700.8016.500.400.400.200.40

Stocking Sizes

XD16N Bar & Wire Coil:0.217″ø to 5.50″ø (5.5 mm ø – 140 mm ø)
XD16N Flat Bar0.625″ wide x 6.000″ thick
1.250″ wide x 1.500″ thick


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