Stainless Steel Pipe Fittings

LDX 2101 UNS S32101 Duplex Stainless Steel Pipe By yaang.com

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LDX 2101 UNS S32101 Duplex Stainless Steel Pipe By yaang.com

LDX 2101 UNS S32101 is a lean duplex stainless steel designed for general purpose use. LDX 2101 UNS S32101 is a 21.5% chromium, 5% manganese, 1.5% nickel, 0.45% molybdenum lean duplex stainless steel with corrosion resistance superior to 304L stainless steel and comparable to 316L stainless steel.

LDX 2101 UNS S32101 Duplex Stainless Steel is a low-alloyed, general purpose lean duplex stainless steel. It possesses properties such as high mechanical strength, similar to that of other duplex stainless steel, and good corrosion resistance. Compared to 300 series stainless steels, 2101 duplex stainless steel provides superior strength and greater chloride stress corrosion cracking resistance.

The use of manganese ensures proper ferrite-austenite phase balance, while allowing a reduction in nickel content. As a result, LDX 2101 UNS S32101 Duplex Stainless Steel is priced competitively with 304L stainless steel and 316L stainless steel.  Due to its relatively low alloying content, it is less prone to precipitation of intermetallic phases than other duplex stainless steel.

Corrosion Resistance

The corrosion resistance of LDX 2101 uns s32101 duplex stainless steel is generally good, and therefore is suitable for use in a wide range of general-purpose applications and environments. Attributable to its duplex structure, LDX 2101 uns s32101 duplex stainless steel offers an excellent resistance to stress corrosion cracking. It also offers corrosion resistance comparable to 304L and 316L stainless steel, making it an excellent candidate to replace 300 series stainless in a wide variety of applications.

What are the characteristics of LDX 2101 uns s32101 duplex stainless steel?

  • High resistance to chloride stress corrosion cracking
  • Chloride pitting and crevice corrosion resistance comparable to 316L stainless steel
  • Good general corrosion resistance
  • High strength
  • Good sulfide stress corrosion resistance
  • Good machinability and weldability

Chemical Composition, %

Cr Ni Mo C N Mn
21.0-22.0 1.35-1.70 0.10-0.80 .040 Max 0.20-0.25 4.00-6.00
Si P S Cu Fe  
1.00 Max .040 Max .030 Max 0.10-0.80 Balance  

In what applications is LDX 2101 uns s32101 duplex stainless steel used?

  • Chemical process vessels, piping and heat exchanger
  • General purpose stainless steel applications
  • Storage Tanks
  • Water treatment
  • Pulp & Paper mill equipment
  • Water heater tanks
  • LDX 2101 UNS S32101 Duplex Stainless Steel Pipe

ASTM Specifications

Pipe Smls Welded Pipe Tube Smls Tube Welded Sheet/Plate Bar
A790 A790 A789 A789 A240 A276

Mechanical Properties Of UNS S32101 Duplex Stainless Steel Pipe
Specified Tensile Properties ASTM A240
Cold Rolled Plate and Sheet > ¼”

Alloy Ultimate Tensile Strength, ksi Minimum .2% Yield Strength, ksi Minimum Elongation % Minimum Hardness Brinell Maximum
2101 94 65 30 290
304/304L 75 30 40 201
316/316L 75 30 40 217
2205 95 65 25 293

Mechanical Properties Of UNS S32101 Duplex Stainless Steel Pipe
Specified Tensile Properties ASTM A240
Cold Rolled Plate and Sheet ≤ ¼”

Alloy Ultimate Tensile Strength, ksi Minimum .2% Yield Strength, ksi Minimum Elongation % Minimum Hardness BrinellMaximum
2101 101 77 30 290
304/304L 75 30 40 201
316/316L 75 30 40 217
2205 95 65 25 293

LDX 2101 UNS S32101 Duplex Stainless Steel is a registered trademark of Outokumpu Stainless Steel.

Physical Properties

Density: 0.278 lb/inch3 
Melting Point: 2525- 2630°F
Poisson’s Ratio: 0.3 
Electrical Resistivity: 481 Ohm – circ mil/ft

Temperature, °F 70 212 392 572
Coefficient* of Thermal Expansion, in/in°F x 10-6 7.5 7.8 8.1
Thermal Conductivity
Btu • ft/ft2 • hr • °F
9.2 9.8 11.0 11.6
Modulus of Elasticity, Dynamic psi x 106 29.7 29 27.6 26.1

* 70°F to indicated temperature.

Source: Zhejiang Yaang Pipe Industry Co., Limited (www.yaang.com)

Article Categories:
Duplex Stainless Steel

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