Stainless Steel 1.4460
EN 1.4460
EN 1.4460 (X3CrNiMoN27-5-2, AISI 329, S31260) is a first-generation duplex stainless with roughly 27% Cr, 5% Ni and 2% Mo plus a nitrogen addition, supplied to EN plate, sheet, bar, forging and tube standards.
Reference datasheet — 1.4460 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the AT condition
1.4460 tempers and conditions
1.4460 is supplied in 5 conditions, soft to hard. AT is the default FabDigit quotes; the values on this page are for it.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
As-welded deposit | Condition of fabricated joints when re-solution annealing is impossible; expect lower HAZ toughness and reduced pitting resistance versus the parent plate. | 480 | 690 | 18 | 25 HRC | 2.2 % IACS |
Hot finished / hot rolled bar, solution annealed | Large-diameter bar for machined valve bodies and stems where cold drawing is impractical. | 490 | 700 | 25 | 22 HRC | 2.2 % IACS |
Forged, solution annealed and quenched | Flanges, tube sheets and heavy fittings; requires full re-solution after forging to dissolve σ/intermetallics formed in the 600–950 °C range. | 490 | 700 | 24 | 23 HRC | 2.2 % IACS |
ATDefault solution annealed (1020–1100 °C) and rapidly quenched | Standard delivery condition for plate, bar, forgings and tube — balanced 50/50 ferrite/austenite with best corrosion resistance and toughness. | 500 | 720 | 25 | 23 HRC | 2.2 % IACS |
solution annealed then cold drawn bar/wire | Cold drawn round bar for shafts, fasteners and pump parts needing closer tolerance and higher strength; ductility and toughness fall with the cold work. | 680 | 850 | 15 | 29 HRC | 2.2 % IACS |
Supply forms, finishes and certifications
Ways 1.4460 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
TUBE+AT | Seamless / welded tube, solution annealed | Supply form |
1D | Hot rolled plate, solution annealed and pickled | Surface finish |
2B | Cold rolled sheet, annealed, pickled and skin-passed | Surface finish |
What is 1.4460?
EN 1.4460 (X3CrNiMoN27-5-2, AISI 329, S31260) is a first-generation duplex stainless with roughly 27% Cr, 5% Ni and 2% Mo plus a nitrogen addition, supplied to EN plate, sheet, bar, forging and tube standards. It was used for heavy-wall pressure equipment needing 500 MPa yield, 720 MPa tensile and 25% elongation with better chloride resistance (score 76) than 316L; stock forms include AT plate, 1D/2B sheet, forged and solution-annealed bar and tube. Service is limited to about 280 °C, machinability is poor (28) and formability moderate (45). EN 1.4462 (2205) is the modern equivalent and is far easier to source. 1.4460 has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,350°C (2,462 °F). 1.4460 has a yield strength of 500 MPa (72.5 ksi) and a tensile strength of 720 MPa (104 ksi) — stronger than 77% of stainless steel grades. Elongation at break is 25% and the elastic modulus is 200 GPa (29 Msi).
What is 1.4460 used for?
- pressure vessels
- pump and valve components
- chemical processing equipment
Advantages
- Good corrosion resistance — 76/100, better than 80% of stainless steel grades
- High strength — 500 MPa (72.5 ksi), better than 77% of stainless steel grades
Limitations
- Limited service temperature — 280°C (536 °F), worse than 96% of stainless steel grades
1.4460 properties
Typical room-temperature values for 1.4460-AT; bars are the position among stainless steel grades.
Physical3
1.4460 has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,350°C (2,462 °F).
Mechanical17
1.4460 has a yield strength of 500 MPa (72.5 ksi) and a tensile strength of 720 MPa (104 ksi) — stronger than 77% of stainless steel grades. Elongation at break is 25% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
1.4460 is rated for continuous service to 280°C (536 °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 12.5 µm/m·K (6.94 µin/in·°F).
Electrical3
1.4460 conducts electricity at 2.2 % IACS, worse than 61% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is very good (76/100), better than 80% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4460 takes about 62 MJ of energy and emits 4.6 kg of CO₂ — more than 75% of stainless steel grades. Typical recycled content is 70%.
Manufacturability8
1.4460's machinability is poor (28/100, worse than 79% of stainless steel grades); weldability good (55/100); formability fair (45/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the stainless steel family
Yield strength against density for every stainless steel grade FabDigit runs. 1.4460 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1.4460
Is 1.4460 easy to machine?
Machine like 2205 but tougher: rigid setups, sharp coated carbide, ~30–40 % lower cutting speed than 316L, heavy positive feed to cut under the work-hardened layer, plenty of coolant.
Can 1.4460 be welded?
GTAW/GMAW/SMAW with over-alloyed filler (ER2209 / 25.9.4L), interpass max ~150 °C, moderate heat input to keep a balanced ferrite/austenite ratio; no post-weld stress relief in the 600–950 °C range — re-solution anneal and quench if possible.
Can 1.4460 be formed, bent or molded?
Cold forming needs roughly twice the force of 304 with large springback allowance; hot work at 1000–1150 °C followed by full solution anneal and water quench.
1.4460 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 |
|---|---|---|
| Clow carbon to limit carbide precipitation | ≤ 0.05 | 0.03 |
| Si | ≤ 1 | 0.5 |
| Mn | ≤ 2 | 1 |
| P | ≤ 0.04 | — |
| S | ≤ 0.02 | — |
| Cr | 25 – 28 | 26.5 |
| Ni | 4.5 – 6.5 | 5.5 |
| Mo | 1.3 – 2 | 1.7 |
| Nlow compared with 2205 (0.14–0.20) | 0.05 – 0.2 | 0.12 |
| Fe | balance | — |
What surface finishes work on 1.4460?
Pickle and passivate (or electropolish) after welding to restore the passive film; grinds and polishes to a bright finish but is ferromagnetic, so magnetic-particle inspection and magnetic clamping both work.
Surface treatments FabDigit runs on stainless steel parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Passivation
Organic Coating
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Stainless Steel 1.4460 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
How much does 1.4460 cost?
1.4460 is a high-cost stainless steel ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
1.4460 — frequently asked
What is 1.4460 used for?
1.4460 is typically used for pressure vessels, pump and valve components and chemical processing equipment. In short: higher-chromium first-generation duplex; AISI 329 equivalent; heavy-wall pressure grade.
What is the yield strength of 1.4460?
1.4460 has a typical yield strength of 500 MPa (72.5 ksi) and a tensile strength of 720 MPa (104 ksi) — stronger than 77% of stainless steel grades. Strength varies by condition: see the 5 listed tempers.
Is 1.4460 easy to machine?
Not especially — machinability is rated poor (28/100, worse than 79% of stainless steel grades). Machine like 2205 but tougher: rigid setups, sharp coated carbide, ~30–40 % lower cutting speed than 316L, heavy positive feed to cut under the work-hardened layer, plenty of coolant.
Can 1.4460 be welded?
Yes — weldability is rated good (55/100). GTAW/GMAW/SMAW with over-alloyed filler (ER2209 / 25.9.4L), interpass max ~150 °C, moderate heat input to keep a balanced ferrite/austenite ratio; no post-weld stress relief in the 600–950 °C range — re-solution anneal and quench if possible.
What surface finishes work on 1.4460?
Pickle and passivate (or electropolish) after welding to restore the passive film; grinds and polishes to a bright finish but is ferromagnetic, so magnetic-particle inspection and magnetic clamping both work.
Can 1.4460 be formed, bent or molded?
Cold forming needs roughly twice the force of 304 with large springback allowance; hot work at 1000–1150 °C followed by full solution anneal and water quench.
What is the maximum service temperature of 1.4460?
1.4460 is rated for continuous use to about 280°C (536 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 1.4460-AT and 1.4460-AW?
AT is the default condition — standard delivery condition for plate, bar, forgings and tube — balanced 50/50 ferrite/austenite with best corrosion resistance and toughness. AW: condition of fabricated joints when re-solution annealing is impossible; expect lower HAZ toughness and reduced pitting resistance versus the parent plate. Yield strength is 500 MPa in AT versus 480 MPa in AW.
How much does 1.4460 cost?
1.4460 is a high-cost stainless steel ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- EN 10088-1: Stainless steels — List of stainless steels — CEN (2014)
- EN 10088-2/-3: Stainless steel sheet/plate and semi-finished/bar products — CEN (2014)
- ASTM A240 / A276 (UNS S32900, type 329) — ASTM (2023)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels — ASM International (1990)
- ASM Handbook Vol. 13B — Corrosion: Materials — ASM International (2005)
- Duplex stainless steel data sheets (2205/329 family) — Outokumpu / Sandvik (2023)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.