Stainless Steel - Grade 304N (UNS S30451)

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 304N has better corrosion resistance than grade 302, and is mostly non-magnetic in nature; however when cold worked it acquires a slightly magnetic quality.

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

Chemical Composition

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

Element Content (%)
Chromium, Cr 18-20
Nickel, Ni 8-11
Manganese, Mn 2
Silicon, Si 1
Nitrogen, N 0.1-0.16
Carbon, C 0.08
Phosphorous, P 0.045
Sulfur, S 0.030
Iron, fe Balance

Mechanical Properties

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

Properties Metric Imperial
Tensile strength 620 MPa 89900 psi
Yield strength 330 MPa 47900 psi
Elastic modulus 193-200 GPa 28000- 29000 ksi
Hardness, Rockwell B 85 85

Other Designations

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

ASTM A182 ASTM A193 (B8N, B8NA) ASTM A194 (8N, 8NA) ASTM A213 ASTM A240
ASTM A249 ASTM A312 ASTM A358 ASTM A376 ASTM A403
ASTM A430 ASTM A479 ASTM A666 ASTM A688 ASTM A813
ASTM A814









Applications

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

  • Valves
  • Oil well filter screens
  • Cooling coils
  • Pressure vessels
  • evaporators
  • Beer barrels
  • Chemical equipment
  • Dairy equipment,
  • Flexible metal hose
  • Nuclear vessels
  • Textile dyeing equipment
  • Food processing equipment
  • Hypodermic needles

 

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