Stainless Steel 1.4941
EN 1.4941
1.4941 (X6CrNiTiB18-10) is a titanium-stabilised 18-10 austenitic stainless with a boron addition, combining as-welded intergranular corrosion resistance with neutron absorption for nuclear work.
Reference datasheet — 1.4941 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
1.4941 tempers and conditions
1.4941 is supplied in 6 conditions, soft to hard. AT is the default FabDigit quotes; the values on this page are for it.
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Hot finished + solution annealed | Choose for large-diameter seamless pipe and heavy bar where cold drawing is impractical; slightly coarser grain and scaled surface. | 230 | 560 | 45 | 155 HB | 2.4 % IACS |
ATDefault solution annealed (1020–1080 °C, rapid quench) | Standard delivery condition for tube, pipe and plate; maximum ductility and intergranular corrosion resistance. | 240 | 580 | 45 | 160 HB | — |
As-welded deposit | Property level to assume for weld joints when no post-weld solution anneal is performed. | 300 | 550 | 30 | 175 HB | 2.4 % IACS |
Cold drawn | Use for precision tube and bright bar needing tighter tolerances and higher yield than the annealed state. | 480 | 700 | 25 | 220 HB | — |
Quarter hard | Pick when a moderate strength increase is needed while retaining useful bending ductility. | 550 | 780 | 18 | 25 HRC | 2.4 % IACS |
Half hard | For flat springs, clamps and strapping where high strength matters more than formability. | 680 | 900 | 12 | 30 HRC | 2.4 % IACS |
What is 1.4941?
1.4941 (X6CrNiTiB18-10) is a titanium-stabilised 18-10 austenitic stainless with a boron addition, combining as-welded intergranular corrosion resistance with neutron absorption for nuclear work. Typical forms are solution-annealed plate and bar, hot-finished sections and cold-drawn product; annealed properties are 240 MPa yield, 580 MPa tensile, 45 % elongation and 160 HB, with service to 700 °C. Boron increases hot-cracking sensitivity, machining is gummy, and titanium carbonitride stringers can mark polished surfaces. Standard 1.4541 (321) is the alternative when boron is not required. 1.4941 has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 68% of stainless steel grades. It melts at 1,400°C (2,552 °F). 1.4941 has a yield strength of 240 MPa (34.8 ksi) and a tensile strength of 580 MPa (84.1 ksi) — weaker than 96% of stainless steel grades. Elongation at break is 45% and the elastic modulus is 200 GPa (29 Msi).
What is 1.4941 used for?
- nuclear reactor components
- control rod cladding
- neutron absorber elements
- high-temperature welded assemblies
Advantages
- Forms and bends easily — 80/100, better than 93% of stainless steel grades
- Tough — resists crack growth — 200 MPa·√m (182 ksi·√in), better than 86% of stainless steel grades
- Readily welded — 82/100, better than 84% of stainless steel grades
- Ductile — tolerates forming and impact — 45%, better than 76% of stainless steel grades
Limitations
- Low strength — 240 MPa (34.8 ksi), worse than 96% of stainless steel grades
1.4941 properties
Typical room-temperature values for 1.4941-AT; bars are the position among stainless steel grades.
Physical3
1.4941 has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 68% of stainless steel grades. It melts at 1,400°C (2,552 °F).
Mechanical16
1.4941 has a yield strength of 240 MPa (34.8 ksi) and a tensile strength of 580 MPa (84.1 ksi) — weaker than 96% of stainless steel grades. Elongation at break is 45% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
1.4941 is rated for continuous service to 700°C (1,292 °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 16.5 µm/m·K (9.17 µin/in·°F).
Electrical3
1.4941 conducts electricity at 2.4 % IACS, better than 67% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (65/100), better than 56% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4941 takes about 55 MJ of energy and emits 4.5 kg of CO₂ — more than 50% of stainless steel grades. Typical recycled content is 45%.
Manufacturability8
1.4941's machinability is fair (38/100, better than 63% of stainless steel grades); weldability very good (82/100); formability very good (80/100).
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. 1.4941 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1.4941
Is 1.4941 easy to machine?
Gummy and work-hardening like 321 — use rigid setups, positive-rake carbide, heavy depth of cut, 60–100 m/min and flood coolant; avoid dwelling.
Can 1.4941 be welded?
TIG/MIG/SAW with Ti- or Nb-stabilized filler (ER321/ER347); keep heat input low and interpass < 150 °C because boron increases hot-cracking risk; no post-weld anneal required for IGC resistance.
Can 1.4941 be formed, bent or molded?
Excellent cold formability in the +AT condition but high springback and rapid work hardening; interstage annealing at 1020–1080 °C with rapid cooling for severe draws.
1.4941 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 |
|---|---|---|
| Ckept low for stabilization ratio | ≤ 0.08 | 0.06 |
| Si | ≤ 1 | 0.5 |
| Mn | ≤ 2 | 1.2 |
| P | ≤ 0.05 | 0.03 |
| S | ≤ 0.02 | 0.01 |
| Cr | 17 – 19 | 18 |
| Ni | 9 – 12 | 10.5 |
| Ti≥ 5×C for stabilization against intergranular attack | 0.3 – 0.8 | 0.5 |
| Bmicro-addition; strengthens grain boundaries and raises creep-rupture strength | 0 – 0.01 | 0 |
| Fe | balance |
What surface finishes work on 1.4941?
Pickle and passivate (nitric or citric per ASTM A967) or electropolish; not anodizable; Ti-carbonitride stringers can leave fine streaks on mirror-polished surfaces.
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 1.4941 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- X6CrNiTiB18-10
How much does 1.4941 cost?
1.4941 is a premium-cost stainless steel ($$$), cheaper than about 51% 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.
1.4941 — frequently asked
What is 1.4941 used for?
1.4941 is typically used for nuclear reactor components, control rod cladding, neutron absorber elements and high-temperature welded assemblies. In short: ti-stabilised boron-bearing 18-10; as-welded IGC resistance; nuclear-grade 321 variant.
What is the yield strength of 1.4941?
1.4941 has a typical yield strength of 240 MPa (34.8 ksi) and a tensile strength of 580 MPa (84.1 ksi) — weaker than 96% of stainless steel grades. Strength varies by condition: see the 6 listed tempers.
Is 1.4941 easy to machine?
Not especially — machinability is rated fair (38/100, better than 63% of stainless steel grades). Gummy and work-hardening like 321 — use rigid setups, positive-rake carbide, heavy depth of cut, 60–100 m/min and flood coolant; avoid dwelling.
Can 1.4941 be welded?
Yes — weldability is rated very good (82/100). TIG/MIG/SAW with Ti- or Nb-stabilized filler (ER321/ER347); keep heat input low and interpass < 150 °C because boron increases hot-cracking risk; no post-weld anneal required for IGC resistance.
What surface finishes work on 1.4941?
Pickle and passivate (nitric or citric per ASTM A967) or electropolish; not anodizable; Ti-carbonitride stringers can leave fine streaks on mirror-polished surfaces.
Can 1.4941 be formed, bent or molded?
Excellent cold formability in the +AT condition but high springback and rapid work hardening; interstage annealing at 1020–1080 °C with rapid cooling for severe draws.
What is the maximum service temperature of 1.4941?
1.4941 is rated for continuous use to about 700°C (1,292 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 1.4941-AT and 1.4941-CD?
AT is the default condition — standard delivery condition for tube, pipe and plate; maximum ductility and intergranular corrosion resistance. CD: use for precision tube and bright bar needing tighter tolerances and higher yield than the annealed state. Yield strength is 240 MPa in AT versus 480 MPa in CD.
How much does 1.4941 cost?
1.4941 is a premium-cost stainless steel ($$$), cheaper than about 51% 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
- DIN 17459 — Seamless circular tubes of heat-resisting steels — DIN (1992)
- VdTÜV-Werkstoffblatt 432 — X6CrNiTiB18-10 (1.4941) — VdTÜV (2010)
- EN 10088-1/-3 — Stainless steels: list of grades, technical delivery conditions — CEN (2014)
- 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)
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.