Stainless Steel - Grade 304LN (UNS S30453)

Topics Covered

Introduction
Chemical Composition
Mechanical Properties
Other Designations
Applications

Introduction

Stainless steel grade 304 is the most commonly used stainless steel. Stainless steel grade 304LN is a nitrogen-strengthened version of stainless steel grade 304.

The following datasheet provides an overview of grade 304LN stainless steel.

Chemical Composition

The chemical composition of grade 304LN stainless steel is outlined in the following table.

Element Content (%)
Chromium, Cr 18-20
Nickel, Ni 8-12
Manganese, Mn 2 max
Silicon, Si 1 max
Nitrogen, N 0.1-0.16
Phosphorous, P 0.045 max
Carbon, C 0.03 max
Sulfur, S 0.03 max
Iron, Fe Remainder

Mechanical Properties

The mechanical properties of grade 304LN stainless steel are displayed in the following table.

Properties Metric Imperial
Tensile strength 515 MPa 74694 psi
Yield strength 205 MPa 29732 psi
Elongation at break (in 50 mm) 40% 40%
Hardness, Brinell 217 217
Hardness, Rockwell B 95 95

Other Designations

Equivalent materials to grade 304LN stainless steel are given below.

ASTM A182 ASTM A213 ASTM A269 ASTM A312 ASTM A376
ASTM A240 ASTM A249 ASTM A276 ASTM A336 ASTM A403
ASTM A193 (B8LN, B8LNA) ASTM A194 (8LN, 8LNA) ASTM A320 (B8LN, B8LNA) ASTM A479 ASTM A666
ASTM A688

ASTM A813

ASTM A814

DIN 1.4311



Applications

Grade 304LN stainless steel is widely used in the following applications:

  • Heat exchangers
  • Chemical industry
  • Food industry
  • Petroleum industry
  • Fabrication industry
  • Nuclear industry

 


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