UNS S32001 welded pipes and tubes are a lean duplex stainless steel grade suited to applications that need higher strength with lower nickel content. Also known as 19D, UNS S32001 contains about 20% chromium and 1% to 3% nickel, with manganese and nitrogen used in place of much of the nickel found in conventional stainless steels. Its 450 MPa minimum yield strength is significantly higher than 304L, while its corrosion resistance is at or above that of 304L. Amardeep Steel supplies UNS S32001 welded pipes and tubes to ASTM A789 and A790. Compare them with our UNS S32101 welded pipes and tubes and SS 304L pipes and tubes, or browse all duplex steel pipes and tubes. Every order includes an EN 10204 3.1 mill test certificate and full heat traceability.
What Are UNS S32001 Welded Pipes and Tubes?
S32001 was developed as a low cost duplex for uses that would otherwise take 304L. Its low nickel and molybdenum make its price far less sensitive to nickel prices, while its duplex structure doubles the strength and improves resistance to chloride stress corrosion cracking. It is not meant for strong acids or high chloride service, where 2205 is the better choice.
Supply Standards for S32001 Tube
Welded S32001 tube is supplied to ASTM A789 and welded pipe to ASTM A790, with strip to ASTM A240. Tube and pipe are solution annealed after welding. Confirm the standard and edition on your order.
S32001 Welded Pipe Specifications
Parameter | Details |
|---|---|
Grade | Lean Duplex S32001 (19D) |
UNS | S32001 |
Standards | ASTM A789 / ASME SA789 (tube), ASTM A790 / ASME SA790 (pipe) |
Type | Welded tube and pipe, longitudinal seam, TIG or plasma welded; larger bores as EFW pipe with filler |
Size Range | Tube and pipe sizes to the purchase specification |
Schedules | SCH 5S, 10S, 40S, 80S and specified wall |
Length | Random, fixed and cut lengths |
Ends | Plain end and bevelled end |
Heat Treatment | Solution annealed and rapidly cooled after welding |
Test Certificate | EN 10204 3.1, with 3.2 available on request |
S32001 Chemical Composition
Element | Content (%) |
|---|---|
Carbon (C) | 0.030 max |
Manganese (Mn) | 4.00 to 6.00 |
Phosphorus (P) | 0.040 max |
Sulfur (S) | 0.030 max |
Silicon (Si) | 1.00 max |
Nickel (Ni) | 1.00 to 3.00 |
Chromium (Cr) | 19.5 to 21.5 |
Molybdenum (Mo) | 0.60 max |
Nitrogen (N) | 0.05 to 0.17 |
Copper (Cu) | 1.00 max |
S32001 Mechanical Properties
Property | Value |
|---|---|
Tensile Strength, min | 620 MPa (90 ksi) |
Yield Strength (0.2% offset), min | 450 MPa (65 ksi) |
Elongation in 50 mm, min | 25% |
Hardness, max | 290 HBW |
S32001 Equivalent Grades
Standard | Designation |
|---|---|
UNS | S32001 |
Common name | 19D, Duplex 2001 |
Closest EN grade | 1.4482 (X2CrMnNiMoN21-5-3), a close match, not identical |
ASTM pipe / tube | A790 / A789 |
Equivalent grades are close matches, not direct substitutes. Check the drawing before switching standards.
304L vs S32001 vs S32101
Property | 304L | S32001 | S32101 |
|---|---|---|---|
Chromium | 18 to 20% | 19.5 to 21.5% | 21.0 to 22.0% |
Nickel | 8 to 13% | 1.0 to 3.0% | 1.35 to 1.70% |
Molybdenum | Not specified | 0.60 max | 0.10 to 0.80% |
Nitrogen | Not specified | 0.05 to 0.17% | 0.20 to 0.25% |
Min. yield strength | 170 MPa | 450 MPa | 450 MPa (530 MPa thin wall) |
PREN (spec range) | 18.0 to 20.0 | 20.3 to 26.2 | 24.5 to 28.6 |
PREN is worked out as Cr + 3.3 Mo + 16 N, using the minimum and maximum of each specified range. Yield values are ASTM A790 and ASTM A312 minimums.
For higher nitrogen and better pitting resistance, see our UNS S32101 welded pipes and tubes. For more nickel, see our UNS S32304 welded pipes and tubes.
Applications of S32001 Welded Pipes and Tubes
- Potable water and utility piping
- Storage tank and process lines in place of 304L
- Structural and architectural tube
- Equipment frames and handling systems in mild environments
Testing and Documentation
Every order of S32001 welded pipe and tube goes through the checks below at our testing facility or approved third party labs.
- Chemical analysis and PMI
- Tension and hardness tests
- Flattening test, with flange test on tube
- Hydrostatic or eddy current test on every length
- Ferrite content check on weld and base metal on request
- Visual and dimensional inspection, including weld bead height
Mill test certificates are issued to EN 10204 3.1, with 3.2 available on request. You can view our approvals on the certificates page.
Packing and Marking
Each length is marked with the standard, UNS S32001, size, heat number and manufacturer name. Ends are capped, and pipes are kept apart from carbon steel and packed in bundles or wooden boxes. Read more about our packing and despatch process.
Request a Quote for UNS S32001 Welded Pipes & Tubes
Send us the OD or NB, wall or schedule, standard, length and quantity, and our team will reply with price and delivery. Use the enquiry form or reach us through the contact page.
Frequently Asked Questions
What is UNS S32001?
UNS S32001 (19D) is a lean duplex stainless steel with 19.5% to 21.5% chromium, 1% to 3% nickel, 4% to 6% manganese and 0.05% to 0.17% nitrogen.
What is the difference between S32001 and S32101?
Both are low nickel lean duplex grades. S32101 has more chromium and nitrogen, which gives better pitting resistance. S32001 allows more nickel but less nitrogen.
Which standards cover S32001 welded tube?
ASTM A789 covers welded tube and ASTM A790 covers welded pipe. Strip is supplied to ASTM A240.
What is the minimum yield strength of S32001?
S32001 has a 450 MPa (65 ksi) minimum yield strength and 620 MPa (90 ksi) minimum tensile strength.
