Physical properties
| Density | 7.7 | g/cm³ |
| Modulus E | 205 / 200 / 190 / 180 | GPa @ 20 / 100 / 200 / 300 °C |
| Thermal conductivity | 15 | W/(m·K) @ 20 °C |
| Thermal expansion | 13.0 / 14.0 / 14.5 | 10⁻⁶/K, mean 20-100 / 20-200 / 20-300 °C |
| Specific heat | 500 | J/(kg·K) @ 20 °C |
| Resistivity | 0.75 | Ω·mm²/m @ 20 °C |
Informative values: they vary with composition, condition and test method. Use the governing standard or measured mill data for pressure and heat-transfer calculations.
Values are taken from EN 1.4162 (the same alloy) and are informative.
Duplex grades are magnetic.
Chemical composition
Nominal: mid-range where both limits are given, the cap where only a maximum is, balance takes the remainder. Exact specified ranges below.
| Element | Name | Content % | |
|---|---|---|---|
| Main elements7 elements | |||
| Fe | Iron | Bal. | |
| Cr | Chromium | 21 – 22% | |
| Mn | Manganese | 4 – 6% | |
| Ni | Nickel | 1.35 – 1.7% | |
| Mo | Molybdenum | 0.1 – 0.8% | |
| Cu | Copper | 0.1 – 0.8% | |
| N | Nitrogen | 0.2 – 0.25% | |
| Element | Name | Content % | |
|---|---|---|---|
| Minor & residual4 elements | |||
| C | Carbon | ≤ 0.04% | |
| Si | Silicon | ≤ 1% | |
| P | Phosphorus | ≤ 0.04% | |
| S | Sulphur | ≤ 0.03% | |
Mechanical minima by form
Guaranteed values differ by form, size and delivery condition; quotations confirm the specification, form, size and condition.
| Form | Condition | Rm MPa | Rp0.2 MPa | A ≥ % | Other requirements and notes |
|---|---|---|---|---|---|
| Bar and forgings | |||||
| Bar and shapes | Condition A (hot or cold finished, all sizes); A479 annealed | ≥ 650 (94 ksi) | ≥ 450 (65 ksi) | ≥ 30 | Also specified: Hardness ≤ 290 HBW |
| Forgings, flanges and valve parts (F69) | Solution treated at not less than 1870 °F [1021 °C], liquid quenched below 500 °F [260 °C] | ≥ 650 (94 ksi) | ≥ 450 (65 ksi) | ≥ 30 | |
| Bars (EN 10088-3, ≤160 mm) | +AT (solution annealed) | 650 – 900 | ≥ 400 | ≥ 25 | Also specified: Hardness ≤ 290 HBW KV ≥ 60 J longitudinal. |
| Plate, sheet and strip | |||||
| Plate, sheet and strip (t≤5.00 mm) | Solution treated | ≥ 700 (102 ksi) | ≥ 530 (77 ksi) | ≥ 30 | Also specified: Hardness ≤ 290 HBW / 31 HRC |
| Plate (t>5.00 mm) | Solution treated | ≥ 650 (94 ksi) | ≥ 450 (65 ksi) | ≥ 30 | Also specified: Hardness ≤ 290 HBW / 31 HRC |
| Cold-rolled strip (EN 10088-2, ≤8 mm) | +AT (solution annealed) | 700 – 900 | ≥ 530 | ≥ 25 | 3 mm and over: A ≥ 30 %. |
| Hot-rolled plate (EN 10088-2, ≤75 mm) | +AT (solution annealed) | 650 – 850 | ≥ 450 | ≥ 30 | Hot-rolled strip (≤13.5 mm): Rp0.2 ≥ 480 MPa, Rm 680–900 MPa. KV over 10 mm: strip ≥ 80/80 J, plate ≥ 60/60 J (long./transv.). |
| Tube and pipe | |||||
| Heat-exchanger and instrument tubing (wall ≤5.00 mm) | Solution treated at not less than 1870 °F[1020 °C], water quenched or otherwise rapidly cooled | ≥ 700 (102 ksi) | ≥ 530 (77 ksi) | ≥ 30 | Also specified: Hardness ≤ 290 HBW (290 HV) / 30 HRC |
| Heat-exchanger and instrument tubing (wall >5.00 mm) | Solution treated at not less than 1870 °F[1020 °C], water quenched or otherwise rapidly cooled | ≥ 650 (94 ksi) | ≥ 450 (65 ksi) | ≥ 30 | Also specified: Hardness ≤ 290 HBW (290 HV) / 30 HRC |
| Seamless and welded pipe (wall ≤5.00 mm) | 1870 °F [1020 °C] minimum, rapid cooling in water or by other means | ≥ 700 (102 ksi) | ≥ 530 (77 ksi) | ≥ 30 | Also specified: Hardness ≤ 290 HBW H₂S service: with FPREN below 30, this grade is not in the NACE MR0175 / ISO 15156-3 duplex tables; qualification testing to the standard's annex is required first. |
| Seamless and welded pipe (wall >5.00 mm) | 1870 °F [1020 °C] minimum, rapid cooling in water or by other means | ≥ 650 (94 ksi) | ≥ 450 (65 ksi) | ≥ 30 | Also specified: Hardness ≤ 290 HBW As above |
| Electric-fusion-welded pipe with filler metal | All classes; by default solution treated after welding at not less than 1870 °F [1020 °C] and rapidly cooled in air or water | ≥ 650 (94 ksi) | ≥ 450 (65 ksi) | ≥ 30 | |
| Fittings and flanges | |||||
| Factory-made fittings (WPS32101/CRS32101) | Solution treated at not less than 1870 °F [1021 °C], water quenched or otherwise rapidly cooled | ≥ 650 (94 ksi) | ≥ 450 (65 ksi) | ≥ 30 | Also specified: Hardness ≤ 290 HBW |
Where this grade is recommended
Matched in 3 service conditions; ranks and scores computed from the condition-scoring matrix.
| Service condition | Industry | Temperature | Rank | Score |
|---|---|---|---|---|
| Ballast & tank systems | Marine & Offshore | ≤ 40 °C | 6 / 10 | 86 |
| Platform structures & clamps | Marine & Offshore | Atmospheric & splash | 5 / 7 | 85 |
| Flowlines (chlorides) | Oil & Gas | 80 – 150 °C | 6 / 9 | 84 |
Designations & equivalents
| W.Nr. (Germany) | 1.4162 |
| EN designation | X2CrMnNiN21-5-1 |
| Trade name(s) | LDX 2101 |
| ASTM / AISI | A182 / A240 / A276 / A479 / A484 / A789 / A790 / A815 / A928 |
Cross-references are common near-equivalents for search and shortlisting; substitution across standards requires clause-by-clause verification. All grades in one cross-reference table →
Applicable standards
11 specifications. Name the standard and its edition on the order.
Guaranteed values and required tests differ between specifications — see Mechanical minima by form for the figures per form.
Frequently asked questions
What is LDX 2101 Lean Duplex · UNS S32101?
LDX 2101 Lean Duplex · UNS S32101 — Duplex stainless steel. Lean duplex — a cost-driven replacement for 304/316 in structural and pressure parts
What is the maximum service temperature of S32101?
Typically about 250 °C; the practical limit depends on media, stress and design life — acceptance per the governing standard.
What is the tensile strength of S32101?
The specified minimum tensile strength is 650 MPa for the main product form. Minima for other forms and sizes are listed under "Mechanical minima by form" on this page.
Which standards cover S32101?
ASTM A240/A240M, ASTM A182/A182M, ASTM A276/A276M, ASTM A479/A479M, ASTM A484/A484M, ASTM A789/A789M, ASTM A790/A790M, ASTM A815/A815M, ASTM A928/A928M, EN 10088-2 (sheet, plate, strip), EN 10088-3 (bar, rod, wire, sections)
Where is S32101 typically used?
Ballast & tank systems (Marine & Offshore); Platform structures & clamps (Marine & Offshore); Flowlines (chlorides) (Oil & Gas)
In which forms is S32101 available?
Tube, plate, strip, bar, forgings, wire and other forms — sizes and delivery condition confirmed per order, with EN 10204 3.1 / 3.2 certification.
Same series
Download PDF datasheet
This grade’s datasheet as an A4 PDF — for filing, printing or forwarding to colleagues.
Download PDF datasheetSupply & enquiry
Tube & pipeφ1 – 219 × 0.25 – 25 mm
Plate4.76 – 80 mm
Barφ8 – 300 mm
Wire & filler metalsφ0.01 – 8 mmFor this grade we can supply, against your service conditions:
- Tube, plate, strip, bar, forgings, wire and more — with size range and lead time
- Chemistry and mechanical test report (EN 10204 3.1 / 3.2)
- Like-for-like alternatives and selection advice
- Applicable standards and inspection scope
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