Stainless Steel 2101 As Welded
Finish state
UNS S32101 · EN 1.4162, X2CrMnNiN21-5-1 · also LDX 2101
Typical fabricated-joint condition using 2209/25.10.4L type filler; strength matches base metal but weld-zone toughness and pitting resistance are somewhat lower.
Values for the As Welded condition
Other 2101 tempers and conditions
2101 is listed in 4 conditions; see the grade overview at 2101.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
As WeldedThis page welded joint, no post-weld heat treatment | Typical fabricated-joint condition using 2209/25.10.4L type filler; strength matches base metal but weld-zone toughness and pitting resistance are somewhat lower. | 520 | 730 | 25 | 240 HB | 2.7 % IACS |
Solution AnnealedDefault 1000–1100 °C anneal + rapid quench (plate/coil/bar, default stock) | Default stocked condition for plate, coil, bar and tube — balanced 50/50 duplex structure with optimum corrosion resistance and toughness. | 530 | 750 | 38 | 230 HB | — |
cold drawn / cold finished bar and wire | Choose for bar, wire and fasteners needing higher strength and tighter tolerance than annealed bar. | 700 | 870 | 20 | 28 HRC | 2.7 % IACS |
temper-rolled / cold-worked strip and tube (high strength) | Use where maximum strength per unit weight is needed (springs, clamps, reinforcement strip); ductility and formability are much reduced. | 800 | 950 | 12 | 33 HRC | 2.7 % IACS |
What is 2101 As Welded?
2101 As Welded is 2101 supplied in the As Welded condition — typical fabricated-joint condition using 2209/25.10.4L type filler; strength matches base metal but weld-zone toughness and pitting resistance are somewhat lower. 2101 As Welded has a yield strength of 520 MPa (75.4 ksi) and a tensile strength of 730 MPa (106 ksi) — stronger than 79% of stainless steel grades. Elongation at break is 25% and the elastic modulus is 200 GPa (29 Msi). 2101 As Welded has a density of 7.8 g/cm³ (0.282 lb/in³), heavier than 50% of stainless steel grades. It melts at 1,420°C (2,588 °F). Solution Annealed is the default condition FabDigit quotes; As Welded is available on request or by drawing note.
Advantages
- Low embodied carbon — 3.5 kg CO₂/kg, better than 88% of stainless steel grades
- High strength — 520 MPa (75.4 ksi), better than 79% of stainless steel grades
- High electrical conductivity — 2.7 % IACS, better than 78% of stainless steel grades
Limitations
- Limited service temperature — 300°C (572 °F), worse than 90% of stainless steel grades
- Low fracture toughness — 90 MPa·√m (81.9 ksi·√in), worse than 75% of stainless steel grades
2101 As Welded properties
Typical room-temperature values for 2101 As Welded; 22 are specific to this condition. Other listed values are 2101 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
2101 As Welded has a density of 7.8 g/cm³ (0.282 lb/in³), heavier than 50% of stainless steel grades. It melts at 1,420°C (2,588 °F).
Mechanical16
2101 As Welded has a yield strength of 520 MPa (75.4 ksi) and a tensile strength of 730 MPa (106 ksi) — stronger than 79% of stainless steel grades. Elongation at break is 25% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
2101 As Welded is rated for continuous service to 300°C (572 °F). It conducts heat at 15 W/m·K (8.67 BTU/hr·ft·°F), worse than 59% of stainless steel grades. Thermal expansion is 13 µm/m·K (7.22 µin/in·°F).
Electrical3
2101 As Welded conducts electricity at 2.7 % IACS, better than 78% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (60/100), worse than 58% of stainless steel grades.
Sustainability4
Producing a kilogram of 2101 As Welded takes about 48 MJ of energy and emits 3.5 kg of CO₂ — less than 85% of stainless steel grades. Typical recycled content is 65%.
Manufacturability7
2101 As Welded's machinability is poor (34/100, worse than 55% of stainless steel grades); weldability very good (70/100); formability fair (40/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 2101 As Welded
Is 2101 easy to machine?
Machine like a duplex: rigid setup, ~30–50 % of 304 cutting speed, heavy positive feed to cut under the work-hardened layer, sharp coated carbide and generous flood coolant.
Can 2101 be welded?
Weldable by GTAW/GMAW/SMAW/SAW with 2209 (22.9.3L) or 23.7.N filler, low-to-moderate heat input, interpass < 150 °C and no PWHT; avoid autogenous welding of thicker sections to keep ferrite/austenite balance.
Can 2101 be formed, bent or molded?
Cold formable but needs ~2× the press force and larger bend radii than 304, with noticeable springback; hot form 950–1150 °C then re-solution anneal and quench.
What surface finishes work on 2101?
Pickle and passivate after welding to restore the passive film; takes a good brushed or mirror polish, no anodizing (ferrous).
2101 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| C | ≤ 0.04 | 0.03 |
| Si | ≤ 1 | 0.6 |
| Mnaustenite stabiliser replacing Ni | 4 – 6 | 5 |
| P | ≤ 0.04 | — |
| Smax (0.015 max in EN 1.4162) | ≤ 0.03 | — |
| Cr | 21 – 22 | 21.5 |
| Nilean-Ni | 1.35 – 1.7 | 1.5 |
| Mo | 0.1 – 0.8 | 0.3 |
| Cu | 0.1 – 0.8 | 0.3 |
| Nkey strengthener / austenite stabiliser | 0.2 – 0.25 | 0.22 |
| Fe | balance | — |
2101 As Welded — frequently asked
What is 2101 As Welded used for?
2101 As Welded is typically used for bridges, storage tanks and architectural cladding. In short: lean duplex stainless plate.
What is the yield strength of 2101 As Welded?
2101 As Welded has a typical yield strength of 520 MPa (75.4 ksi) and a tensile strength of 730 MPa (106 ksi) — stronger than 79% of stainless steel grades. Strength varies by condition: see the 4 listed tempers.
Is 2101 As Welded easy to machine?
Not especially — machinability is rated poor (34/100, worse than 55% of stainless steel grades). Machine like a duplex: rigid setup, ~30–50 % of 304 cutting speed, heavy positive feed to cut under the work-hardened layer, sharp coated carbide and generous flood coolant.
Can 2101 As Welded be welded?
Yes — weldability is rated very good (70/100). Weldable by GTAW/GMAW/SMAW/SAW with 2209 (22.9.3L) or 23.7.N filler, low-to-moderate heat input, interpass < 150 °C and no PWHT; avoid autogenous welding of thicker sections to keep ferrite/austenite balance.
What surface finishes work on 2101 As Welded?
Pickle and passivate after welding to restore the passive film; takes a good brushed or mirror polish, no anodizing (ferrous).
Can 2101 As Welded be formed, bent or molded?
Cold formable but needs ~2× the press force and larger bend radii than 304, with noticeable springback; hot form 950–1150 °C then re-solution anneal and quench.
What is the maximum service temperature of 2101 As Welded?
2101 As Welded is rated for continuous use to about 300°C (572 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Can FabDigit make parts in 2101 As Welded?
Yes — 2101 As Welded is available for CNC machining and sheet metal; every part is priced by an engineer rather than instantly. Upload a STEP file to get a price and a DFM check.
Sources
- ASTM A240/A240M — Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip (S32101) — ASTM International (2024)
- EN 10088-2 — Stainless steels: technical delivery conditions for sheet/plate and strip (1.4162) — CEN (2014)
- Forta LDX 2101 / duplex stainless datasheet — Outokumpu (2023)
- Sandvik SAF 2101 / lean duplex tube data — Alleima (Sandvik Materials Technology) (2022)
- ASM Specialty Handbook: Stainless Steels — ASM International (1994)
- Practical Guidelines for the Fabrication of Duplex Stainless Steels — IMOA (2014)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.