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ALLOY 316LN • UNS S31653 • WNR 1.4429

316LN (UNS S31653) is a lowcarbon, nitrogen-enhanced version of Type 316 molybdenum-bearing austenitic stainless steel. The Type 316 alloys are more resistant to general corrosion and pitting/crevice corrosion than the conventional chromium-nickel austenitic stainless steels such as Type 304. They also offer higher creep, stress-rupture and tensile strength at elevated temperature. The nitrogen in Type 316LN adds additional resistance to sensitization in some circumstances.

The nitrogen content of Type 316LN stainless steel also provides some solid solution hardening, raising its minimum specified yield strength compared to Type 316L stainless steel. Like Types 316 and 316L, the Type 316LN alloy also offers good resistance to general corrosion and pitting/crevice corrosion.

Available Tube Product form
Typical Applications
  • Orthopaedic implants
  • Trauma nails
  • Neurological applications
  • Surgical instruments
Industries predominantly using this Grade
Typical Manufacturing Specifications
  • ASTM F138
  • ASTM F2181
  • Also individual customer specifications.

Technical Data

Mechanical Properties

Temper Annealed Cold worked
Tensile Rm 75 ksi (min) 125 ksi (min)
Tensile Rm 515 MPa (min) 860 MPa (min)
R.p. 0.2% Yield 30 ksi (min) 100 ksi (min)
R.p. 0.2% Yield 205 MPa (min) 690 MPa (min)
Elongation (2" or 4D gl) 35 % (min) 15 % (min)

Physical Properties (Room Temperature)

Specific Heat (0-100°C) 485°K-1
Thermal Conductivity 16.3 W.m -1.°K-1
Thermal Expansion 16.5 mm/m/°C
Modulus Elasticity 200 GPa
Electrical Resistivity 7.4 μohm/cm
Density 7.99 g/cm3

Chemical Composition (% by weight)

Element Min Max
C - 0.03
Mn - 2
Ni 13 15
Cr 17 19
Mo 2 3
S - 0.1
Si - 0.75
P - 0.25