Stainless Steel Grade 316LN (UNS S31653)

Topics Covered

Introduction
Chemical Composition
Mechanical Properties
Other Designations
Applications

Introduction

Stainless steel grade 316LN is an austenitic type of steel that is a low carbon, nitrogen-enhanced version of grade 316 steel. The nitrogen content in this steel provides solid solution hardening, and raises its minimum specified yield strength. It also possesses good resistance to general corrosion and pitting/crevice corrosion.

The following datasheet provides an overview of stainless steel grade 316LN.

Chemical Composition

The chemical composition of grade 316LN stainless steel is outlined in the following table.

Element Content (%)
Iron, Fe Balance
Chromium, Cr 16.0-18.0
Nickel, Ni 10.0-14.0
Molybdenum, Mo 2.0-3.0
Manganese, Mn 2.00
Silicon, Si 1.00
Nitrogen, N 0.10-0.30
Phosphorous, P 0.045
Carbon, C 0.03
Sulfur, S 0.03

Mechanical Properties

The mechanical properties of grade 316LN stainless steel are displayed in the following table.

Properties Metric Imperial
Tensile strength 515 MPa 74694 psi
Yield strength 205 MPa 29732 psi
Modulus of elasticity 190-210 GPa 27557-30457 ksi
Poisson's ratio 0.27-0.30 0.27-0.30
Elongation at break (in 50 mm) 60% 60%

Other Designations

Equivalent materials to grade 316LN stainless steel are given below.

ASTM A182 ASTM A213 ASTM A240 ASTM A240 ASTM A276
ASTM A193 (B8MN, B8MNA) ASTM A312 ASTM A336 ASTM A358 ASTM A376
ASTM A194 (B8MN, B8MNA) ASTM A403 ASTM A430 ASTM A479 ASTM A666
ASTM A688

ASTM A813

ASTM A814

DIN 1.4406

DIN 1.4429

Applications

Grade 316LN stainless steel is widely used in the following applications:

  • Trauma nails
  • Orthopedic implants
  • Neurological applications
  • Surgical instruments

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