Stainless Steel LDX 2101 (UNS S32101)

Topics Covered

Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Applications

Introduction

LDX 2101 alloy is a low nickel, lean duplex stainless steel that is designed with both superior strength and chloride stress-corrosion cracking resistance, which are much better than 300 series stainless steels.

LDX 2101 was developed for general-purpose use. High chromium and nitrogen content of this alloy along with molybdenum content provide excellent resistance to localized and uniform corrosion.

LDX 2101 acts as a low nickel general purpose substitute for stainless steel grades 304 and 304L. This alloy possesses good fatigue strength, chloride pitting resistance, and good machinability and weldability.

The following sections will discuss in detail about stainless steel grade LDX 2101.

Chemical Composition

The chemical composition of stainless steel grade LDX 2101 is outlined in the following table.

Element Content (%)
Chromium, Cr 21-22
Manganese, Mn 4-6
Nickel, Ni 1.35-1.70
Silicon, Si 1 max
Nitrogen, N 0.20-0.25
Copper, Cu 0.10-0.80
Molybdenum, Mo 0.10-0.80
Phosphorous, P 0.040 max
Carbon, C 0.040 max
Sulfur, S 0.030 max
Iron, Fe Balance

Physical Properties

The physical properties of stainless steel grade LDX 2101 are tabulated below.

Properties Metric Imperial
Density 7.69 g/cm3 0.278 lb/in3
Melting point 1385-1443°C 2525- 2630°F

Mechanical Properties

The following table shows mechanical properties of stainless steel grade LDX 2101 (cold rolled plate and sheet).

Properties Metric Imperial
Tensile strength (min) 696 MPa 101 ksi
Yield strength (min) 530 MPa 77 ksi
Elongation (min) 30% 30%
Hardness, Brinell (max) 290 290

Applications

Stainless steel grade LDX 2101 is used in the following:

  • Biodiesel and ethanol plants and tanks
  • Palm oil and wine storage tanks
  • Bridges, flood gates, and sluice gates
  • Washers and paper machine parts
  • Pulp and paper mill equipment
  • Mixers and agitators
  • Architectural applications
  • Waste water handling systems
  • Ethanol production components
  • External absorber and outlet duct reinforcements
  • Desalination system chambers and evaporators
  • Chemical process pressure vessels, piping and heat exchangers
  • Pressure vessels, heat exchangers, tanks, piping systems and tankers
  • Hydrogen peroxide bleaching reactors, digesters, and white liquor storage tanks

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