Stainless Steel 1.4511
EN 1.4511
1.4511 (X3CrNb17, supplied to the 439 designation) is a niobium-stabilized 17 % Cr ferritic stainless in which Nb ties up carbon and nitrogen so the weld zone keeps its corrosion resistance and ductility.
Reference datasheet — 1.4511 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 Annealed condition
1.4511 tempers and conditions
1.4511 is supplied in 3 conditions, soft to hard. Annealed is the default FabDigit quotes; the values on this page are for it.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
AnnealedDefault Annealed (+A, 2B cold-rolled sheet/strip) | Standard stocked condition for cold-rolled sheet and strip: maximum formability and weldability. | 300 | 470 | 30 | 165 HB | — |
Temper rolled / lightly cold-worked strip | Skin-passed or lightly rolled strip when extra stiffness/flatness is wanted and only mild forming follows. | 440 | 550 | 14 | 11 HRC | 2.9 % IACS |
cold drawn / cold finished bar and wire | Pick for bar and wire needing higher strength, closer tolerances and better surface than hot-rolled. | 480 | 600 | 15 | 13 HRC | 2.9 % IACS |
Supply forms, finishes and certifications
Ways 1.4511 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
Welded Tube Annealed | Welded tube, bright/annealed condition | Supply form |
1D | Hot rolled, annealed and pickled plate/sheet | Surface finish |
2R | Bright annealed cold-rolled sheet/strip | Surface finish |
What is 1.4511?
1.4511 (X3CrNb17, supplied to the 439 designation) is a niobium-stabilized 17 % Cr ferritic stainless in which Nb ties up carbon and nitrogen so the weld zone keeps its corrosion resistance and ductility. It is available as annealed, 2R, 1D, cold-drawn and temper-rolled sheet, strip and welded tube, with 300 MPa yield, 470 MPa tensile, 30 % elongation and service to 815 °C. It contains no molybdenum, so chloride pitting resistance is below 316, and its lower n-value limits heavy stretch forming. Titanium-stabilized ferritics are the nearest alternative. 1.4511 has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,450°C (2,642 °F). 1.4511 has a yield strength of 300 MPa (43.5 ksi) and a tensile strength of 470 MPa (68.2 ksi) — weaker than 68% of stainless steel grades. Elongation at break is 30% and the elastic modulus is 220 GPa (31.9 Msi).
What is 1.4511 used for?
- exhaust components
- architectural trim
- tubing
- welded assemblies
Advantages
- Low embodied carbon — 3 kg CO₂/kg, better than 97% of stainless steel grades
- Conducts heat well — 25 W/m·K (14.4 BTU/hr·ft·°F), better than 93% of stainless steel grades
- Easy to machine — 52/100, better than 91% of stainless steel grades
- High electrical conductivity — 2.9 % IACS, better than 87% of stainless steel grades
- Forms and bends easily — 75/100, better than 87% of stainless steel grades
1.4511 properties
Typical room-temperature values for 1.4511-Annealed; bars are the position among stainless steel grades.
Physical3
1.4511 has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,450°C (2,642 °F).
Mechanical14
1.4511 has a yield strength of 300 MPa (43.5 ksi) and a tensile strength of 470 MPa (68.2 ksi) — weaker than 68% of stainless steel grades. Elongation at break is 30% and the elastic modulus is 220 GPa (31.9 Msi).
Thermal6
1.4511 is rated for continuous service to 815°C (1,499 °F). It conducts heat at 25 W/m·K (14.4 BTU/hr·ft·°F), better than 93% of stainless steel grades. Thermal expansion is 10 µm/m·K (5.56 µin/in·°F).
Electrical3
1.4511 conducts electricity at 2.9 % IACS, better than 87% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (55/100), worse than 71% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4511 takes about 47 MJ of energy and emits 3 kg of CO₂ — less than 87% of stainless steel grades. Typical recycled content is 65%.
Manufacturability7
1.4511's machinability is fair (52/100, better than 91% of stainless steel grades); weldability very good (75/100); formability very good (75/100).
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. 1.4511 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1.4511
Is 1.4511 easy to machine?
Machines like 430 (~55 % of 1212): use sharp positive-rake carbide, rigid setup, generous coolant and avoid dwelling to prevent work-hardened glaze; free-machining versions are not available.
Can 1.4511 be welded?
Excellent as-welded corrosion resistance thanks to Nb stabilization — GTAW/GMAW/laser with 430Nb/309L filler or autogenous; keep heat input low to limit grain coarsening and weld-metal embrittlement.
Can 1.4511 be formed, bent or molded?
Good deep-drawing and roll-forming behaviour with low springback versus austenitics; use larger bend radii than 304 and avoid heavy stretch forming due to lower n-value.
1.4511 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, Nb-stabilized | ≤ 0.05 | 0.02 |
| Si | ≤ 1 | 0.4 |
| Mn | ≤ 1 | 0.4 |
| P | ≤ 0.04 | 0.03 |
| S | ≤ 0.02 | 0 |
| Cr | 16 – 18 | 17 |
| NbNb ≥ 12×C; stabilizer | 0.3 – 1 | 0.5 |
| Fe | balance |
What surface finishes work on 1.4511?
Passivate or electropolish after pickling for best surface; takes brushed, 2B or BA finishes well, can be plated or PVD-coated, but cannot be anodized.
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 1.4511 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- X3CrNb17
- Similar grades
- 439
How much does 1.4511 cost?
1.4511 is a standard-cost stainless steel ($$), cheaper than about 71% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
1.4511 — frequently asked
What is 1.4511 used for?
1.4511 is typically used for exhaust components, architectural trim, tubing and welded assemblies. In short: nb-stabilized 17Cr ferritic; ductile as-welded HAZ; exhaust-grade ferritic.
What is the yield strength of 1.4511?
1.4511 has a typical yield strength of 300 MPa (43.5 ksi) and a tensile strength of 470 MPa (68.2 ksi) — weaker than 68% of stainless steel grades. Strength varies by condition: see the 3 listed tempers.
Is 1.4511 easy to machine?
Reasonably — machinability is rated fair (52/100, better than 91% of stainless steel grades). Machines like 430 (~55 % of 1212): use sharp positive-rake carbide, rigid setup, generous coolant and avoid dwelling to prevent work-hardened glaze; free-machining versions are not available.
Can 1.4511 be welded?
Yes — weldability is rated very good (75/100). Excellent as-welded corrosion resistance thanks to Nb stabilization — GTAW/GMAW/laser with 430Nb/309L filler or autogenous; keep heat input low to limit grain coarsening and weld-metal embrittlement.
What surface finishes work on 1.4511?
Passivate or electropolish after pickling for best surface; takes brushed, 2B or BA finishes well, can be plated or PVD-coated, but cannot be anodized.
Can 1.4511 be formed, bent or molded?
Good deep-drawing and roll-forming behaviour with low springback versus austenitics; use larger bend radii than 304 and avoid heavy stretch forming due to lower n-value.
What is the maximum service temperature of 1.4511?
1.4511 is rated for continuous use to about 815°C (1,499 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does 1.4511 cost?
1.4511 is a standard-cost stainless steel ($$), cheaper than about 71% 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/-2 Stainless steels — technical delivery conditions for sheet/plate/strip — CEN (2014)
- ASTM A240/A240M (UNS S43035 / Type 439 family) — ASTM (2023)
- ASM Handbook Vol.1: Properties and Selection — Irons, Steels and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol.13B: Corrosion — Materials — ASM International (2005)
- Ferritic stainless steel 1.4511/1.4510 data sheet — Outokumpu (2022)
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.