S32101 Pipes & Tubes are stainless steels from the lean duplex series which have the properties of being highly strong, pit-resistant, and chloride stress corrosion cracking-resistant. Also called UNS S32101, Lean Duplex 2101, and EN 1.4162, this particular type of stainless steel contains roughly 21.5% chromium, 1.5% nickel, 5% manganese, and 0.22% nitrogen. Its duplex microstructure provides a minimum yield strength of around 530 MPa for specified product forms, making it an alternative to 304L in suitable applications. Pipe is supplied to ASTM A790 and tube to ASTM A789. These products are used in water treatment plants, storage tanks, structural systems, and industrial piping. Amardeep Steel is a trusted manufacturer and supplier of S32101 Pipes & Tubes in India, supplying material with full inspection documentation.
Technical Data
Specifications of S32101 Pipes & Tubes
| Specification Parameter | Technical Details |
|---|---|
|
Grade Designation |
UNS S32101, Lean Duplex 2101, LDX 2101, EN 1.4162 (X2CrMnNiN21-5-1) |
|
Seamless & Welded Pipe Standard |
ASTM A790 / ASME SA790 |
|
Seamless & Welded Tube Standard |
ASTM A789 / ASME SA789 |
|
EFW Heavy Diameter Pipe |
ASTM A928 (Refer to our S32101 welded page) |
|
European Tube Standard |
EN 10217-7 (Welded), Grade 1.4162 |
|
Pipe Size Range |
1/2" to 24" NB; SCH 5S, 10S, 40S, 80S |
|
Tube Size Range |
6.35 mm to 50.8 mm OD, 0.89 mm to 2.77 mm Wall Thickness |
|
Heat Treatment Condition |
Solution annealed and rapidly quenched |
|
End Finish |
Plain End (PE), Bevelled End (BE), Threaded |
|
Length Options |
Single Random, Double Random, Cut to length |
|
Certification |
EN 10204 3.1 MTC, 3.2 with Third Party Inspection (TPI) |
Chemical Compositions of S32101 Pipes & Tubes
| Element | ASTM A790 / A789 Specification Limits (%) |
|---|---|
|
Carbon (C) |
0.040 max |
|
Manganese (Mn) |
4.00 to 6.00 |
|
Phosphorus (P) |
0.040 max |
|
Sulphur (S) |
0.030 max |
|
Silicon (Si) |
1.00 max |
|
Nickel (Ni) |
1.35 to 1.70 |
|
Chromium (Cr) |
21.0 to 22.0 |
|
Molybdenum (Mo) |
0.10 to 0.80 |
|
Nitrogen (N) |
0.20 to 0.25 |
|
Copper (Cu) |
0.10 to 0.80 |
|
Iron (Fe) |
Balance |
UNS S32101 Pipes & Tubes Mechanical Properties
| Mechanical Property (Solution Annealed, ASTM A790) | Wall Thickness ≤ 5 mm (0.187 in) | Wall Thickness > 5 mm (0.187 in) |
|---|---|---|
|
Tensile Strength, min |
700 MPa (101 ksi) |
650 MPa (94 ksi) |
|
Yield Strength (0.2% offset), min |
530 MPa (77 ksi) |
450 MPa (65 ksi) |
|
Elongation in 50 mm, min |
30% |
30% |
|
Hardness, max |
290 HBW |
290 HBW |
Physical Properties of S32101 Pipes & Tubes
| Physical Property (at 20°C) | Typical Value |
|---|---|
|
Density |
7.8g/cm3 |
|
Modulus of Elasticity |
~200 GPa |
|
Mean Coefficient of Thermal Expansion (20°C to 100°C) |
~13 μm/m⋅ ∘ C |
|
Thermal Conductivity |
~15 W/m⋅K |
|
Ferromagnetism |
Magnetic (due to ferrite phase) |
Equivalent Grades of S32101 Pipes & Tubes
| Standard / System | Grade Designation |
|---|---|
|
UNS System |
UNS S32101 |
|
EN / Werkstoff Number |
1.4162 (X2CrMnNiN21-5-1) |
|
Commercial Trade Name |
LDX 2101 (Outokumpu) |
|
Common Generic Name |
Lean Duplex 2101 |
|
ASTM Product Standards |
ASTM A790 (Pipe), ASTM A789 (Tube), ASTM A928 (EFW Pipe) |
S32101 Pipe Schedule and Weight Chart
| NPS | OD (mm) | SCH 5S (Wall / Wt) | SCH 10S (Wall / Wt) | SCH 40S (Wall / Wt) | SCH 80S (Wall / Wt) |
|---|---|---|---|---|---|
|
1/2" |
21.34 |
1.65 mm / 0.80 kg/m |
2.11 mm / 0.99 kg/m |
2.77 mm / 1.26 kg/m |
3.73 mm / 1.61 kg/m |
|
3/4" |
26.67 |
1.65 mm / 1.01 kg/m |
2.11 mm / 1.27 kg/m |
2.87 mm / 1.67 kg/m |
3.91 mm / 2.18 kg/m |
|
1" |
33.40 |
1.65 mm / 1.28 kg/m |
2.77 mm / 2.08 kg/m |
3.38 mm / 2.49 kg/m |
4.55 mm / 3.22 kg/m |
|
1 1/4" |
42.16 |
1.65 mm / 1.64 kg/m |
2.77 mm / 2.67 kg/m |
3.56 mm / 3.37 kg/m |
4.85 mm / 4.43 kg/m |
|
1 1/2" |
48.26 |
1.65 mm / 1.88 kg/m |
2.77 mm / 3.09 kg/m |
3.68 mm / 4.02 kg/m |
5.08 mm / 5.38 kg/m |
|
2" |
60.33 |
1.65 mm / 2.37 kg/m |
2.77 mm / 3.91 kg/m |
3.91 mm / 5.41 kg/m |
5.54 mm / 7.44 kg/m |
|
2 1/2" |
73.03 |
2.11 mm / 3.67 kg/m |
3.05 mm / 5.23 kg/m |
5.16 mm / 8.58 kg/m |
7.01 mm / 11.34 kg/m |
|
3" |
88.90 |
2.11 mm / 4.49 kg/m |
3.05 mm / 6.42 kg/m |
5.49 mm / 11.22 kg/m |
7.62 mm / 15.18 kg/m |
|
4" |
114.30 |
2.11 mm / 5.80 kg/m |
3.05 mm / 8.31 kg/m |
6.02 mm / 15.97 kg/m |
8.56 mm / 22.18 kg/m |
|
6" |
168.28 |
2.77 mm / 11.23 kg/m |
3.40 mm / 13.74 kg/m |
7.11 mm / 28.08 kg/m |
10.97 mm / 42.29 kg/m |
|
8" |
219.08 |
2.77 mm / 14.68 kg/m |
3.76 mm / 19.84 kg/m |
8.18 mm / 42.27 kg/m |
12.70 mm / 64.23 kg/m |
S32101 Tube Size Chart
| Tube OD | 20 BWG (0.89 mm) | 18 BWG (1.24 mm) | 16 BWG (1.65 mm) | 14 BWG (2.11 mm) | 12 BWG (2.77 mm) |
|---|---|---|---|---|---|
|
1/2" (12.70 mm) |
0.26 kg/m |
0.35 kg/m |
0.45 kg/m |
0.55 kg/m |
0.67 kg/m |
|
5/8" (15.88 mm) |
0.33 kg/m |
0.44 kg/m |
0.58 kg/m |
0.71 kg/m |
0.89 kg/m |
|
3/4" (19.05 mm) |
0.40 kg/m |
0.54 kg/m |
0.70 kg/m |
0.88 kg/m |
1.11 kg/m |
|
1" (25.40 mm) |
0.53 kg/m |
0.73 kg/m |
0.96 kg/m |
1.20 kg/m |
1.54 kg/m |
|
1 1/4" (31.75 mm) |
0.67 kg/m |
0.93 kg/m |
1.22 kg/m |
1.53 kg/m |
1.97 kg/m |
|
1 1/2" (38.10 mm) |
0.81 kg/m |
1.12 kg/m |
1.47 kg/m |
1.86 kg/m |
2.40 kg/m |
|
2" (50.80 mm) |
1.09 kg/m |
1.51 kg/m |
1.99 kg/m |
2.52 kg/m |
3.26 kg/m |
Applications and Industrial Uses of S32101 Pipes & Tubes
- Water Treatment Plants
- Wastewater Treatment Systems
- Storage Tanks and Tank Fabrication
- Chemical Processing Equipment
- Industrial Piping Systems
- Structural Support Systems
- Pulp and Paper Processing Equipment
- Industrial Water Distribution Systems
Frequently Asked Questions
What is UNS S32101?
UNS S32101 (lean duplex 2101, EN 1.4162) is a low-nickel lean duplex stainless steel alloyed with 21% to 22% chromium, 1.35% to 1.70% nickel, 4% to 6% manganese, and 0.20% to 0.25% nitrogen.
Which ASTM standards cover S32101 pipes and tubes?
ASTM A790 / ASME SA790 covers seamless and welded pipe, ASTM A789 / ASME SA789 covers seamless and welded tube, and ASTM A928 covers electric fusion welded (EFW) pipe.
Why does S32101 have different strength values by wall thickness?
ASTM A790 mandates higher minimum strength values for wall thicknesses up to 5 mm (700 MPa tensile, 530 MPa yield) than for heavier wall thicknesses over 5 mm (650 MPa tensile, 450 MPa yield) due to cooling rate dynamics during processing.
Can S32101 replace 304L?
Yes. In water, storage tank, and structural applications, S32101 provides superior pitting resistance, elevated resistance to stress corrosion cracking, and more than double the yield strength of 304L.
What is the difference between S32101 and S32304?
S32304 contains higher nickel (3% to 5.5%) and lower manganese. S32101 replaces most nickel content with manganese and nitrogen while maintaining a higher minimum yield strength.
Is S32101 magnetic?
Yes. Due to its dual-phase microstructure containing approximately 50% ferrite, S32101 exhibits strong magnetic properties.
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