Stainless Steel Grade 201LN (UNS S20153)

Topics Covered

Introduction
Chemical Composition
Mechanical Properties
Applications

Introduction

Grade 201 is a cheaper alternative to the traditional Cr-Ni austenitic stainless steels such as grade 304. Grade 201LN stainless steel has good resistance to oxidation, easy fabrication, and excellent toughness even in low temperatures. Its high elongation allows bending and forming. It is not expensive as lower cost nitrogen and manganese are added as partial alternative for nickel. The yield and tensile strengths of grade 201LN increases when temperature is decreased. The steel is non-magnetic, and is available in sheet and plate forms.

Grade 201LN stainless steel is quite similar to grade 304; however there are advantages unique to grade 201LN. It has good resistance to corrosion, excellent mechanical strength, and increased hardness than grade 304.

The following datasheet provides an overview of grade 201LN stainless steel.

Chemical Composition

The chemical composition of grade AL 201LN™ stainless steel is outlined in the following table.

Element Content (%)
Iron, Fe 71
Chromium, Cr 16-17.5
Manganese, Mn 6.40-7.50
Nickel, Ni 4-5
Copper, Cu ≤ 1
Silicon, Si ≤ 0.75
Nitrogen, N 0.10 - 0.25
Phosphorous, P ≤ 0.045
Carbon, C ≤ 0.030
Sulfur, S ≤ 0.015

Mechanical Properties

The mechanical properties of grade 201LN stainless steel are displayed in the following table.

Properties Metric Imperial
Tensile strength 650 - 880 MPa 94274- 127633 psi
Yield strength 350 - 550 MPa 50763-79770 psi
Elongation 8 – 25% 8 – 25%

Applications

Grade 201LN is used widely in the transportation industry.

The following are the other applications of grade 201LN stainless steel:

  • Strapping
  • Clamps
  • Cable racking
  • Cryogenic vessels
     

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