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