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August 31, 2021

ALLOY 316LN • UNS S31653 • WNR 1.4429 / 316LN Stainless Steel: Austenitic (UNS S31653)

ALLOY 316LN • UNS S31653 • WNR 1.4429 / 316LN Stainless Steel: Austenitic (UNS S31653)

 

316LN (UNS S31653) is a low-carbon, 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

 

COMPOSITION

 

Element Minimum* Maximum*
Chromium 16.0 18.0
Molybdenum 2.00 3.00
Nickel 10.0 14.0
Phosphorus   0.045
Sulfur   0.030
Silicon   0.75
Carbon   0.030
Nitrogen   0.16
Manganese   2.00
Iron balance
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