Stainless Steel 1.4910
EN 1.4910
1.4910 (X3CrNiMoBN17-13-3) is a low-carbon, nitrogen- and boron-alloyed 17-13-3 molybdenum austenitic stainless developed for nuclear absorber and control-rod duty, where boron provides neutron capture alongside molybdenum-grade corrosion resistance.
Reference datasheet — 1.4910 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 SA condition
1.4910 tempers and conditions
1.4910 is supplied in 5 conditions, soft to hard. SA 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 |
|---|---|---|---|---|---|---|
Forged + solution annealed (EN 10222-5 pressure-vessel forging) | Heavy flanges, valve bodies and turbine bolting bodies where through-thickness impact and creep data are required. | 290 | 600 | 42 | 165 HB | 2.3 % IACS |
SADefault Solution annealed | Standard supply condition for plate, bar, tube and forgings — maximum corrosion resistance, ductility and creep design allowables. | 300 | 620 | 45 | 170 HB | — |
Solution annealed + cold drawn bar | Bright cold-drawn bar for machined fasteners and shafts — higher yield and better surface, slightly reduced ductility. | 480 | 720 | 25 | 18 HRC | 2.3 % IACS |
1/4 hard | Light cold work for spring-back or higher-strength sheet parts still needing forming capability. | 540 | 760 | 22 | 22 HRC | 2.3 % IACS |
1/2 hard | Choose when high yield strength at room temperature outweighs formability and creep design allowables. | 790 | 900 | 14 | 30 HRC | 2.2 % IACS |
Supply forms, finishes and certifications
Ways 1.4910 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
BA-TUBE | Bright annealed seamless tube | Supply form |
What is 1.4910?
1.4910 (X3CrNiMoBN17-13-3) is a low-carbon, nitrogen- and boron-alloyed 17-13-3 molybdenum austenitic stainless developed for nuclear absorber and control-rod duty, where boron provides neutron capture alongside molybdenum-grade corrosion resistance. It is supplied as solution-annealed bar and forgings, cold-drawn sections and bright-annealed tube, with 300 MPa yield, 620 MPa tensile, 45 % elongation, 170 HB and service to 620 °C. Boron narrows the hot-working window and raises weld hot-cracking sensitivity, and machinability is low (38). For non-nuclear service, 316LN offers the same corrosion behaviour without the boron restrictions. 1.4910 has a density of 7.95 g/cm³ (0.287 lb/in³), heavier than 81% of stainless steel grades. It melts at 1,390°C (2,534 °F). 1.4910 has a yield strength of 300 MPa (43.5 ksi) and a tensile strength of 620 MPa (89.9 ksi) — weaker than 68% of stainless steel grades. Elongation at break is 45% and the elastic modulus is 197 GPa (28.6 Msi).
What is 1.4910 used for?
- nuclear control rod components
- neutron absorber assemblies
- reactor internals
- spent fuel storage racks
Advantages
- Tough — resists crack growth — 220 MPa·√m (200.2 ksi·√in), better than 97% of stainless steel grades
- Forms and bends easily — 72/100, better than 84% of stainless steel grades
- Ductile — tolerates forming and impact — 45%, better than 76% of stainless steel grades
1.4910 properties
Typical room-temperature values for 1.4910-SA; bars are the position among stainless steel grades.
Physical3
1.4910 has a density of 7.95 g/cm³ (0.287 lb/in³), heavier than 81% of stainless steel grades. It melts at 1,390°C (2,534 °F).
Mechanical16
1.4910 has a yield strength of 300 MPa (43.5 ksi) and a tensile strength of 620 MPa (89.9 ksi) — weaker than 68% of stainless steel grades. Elongation at break is 45% and the elastic modulus is 197 GPa (28.6 Msi).
Thermal6
1.4910 is rated for continuous service to 620°C (1,148 °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 µm/m·K (8.89 µin/in·°F).
Electrical3
1.4910 conducts electricity at 2.3 % IACS, better than 55% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is very good (72/100), better than 73% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4910 takes about 54 MJ of energy and emits 4.6 kg of CO₂ — less than 59% of stainless steel grades. Typical recycled content is 55%.
Manufacturability8
1.4910's machinability is fair (38/100, better than 63% of stainless steel grades); weldability very good (70/100); formability very good (72/100).
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. 1.4910 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1.4910
Is 1.4910 easy to machine?
Machine like 316LN — rigid setup, positive-rake sharp carbide, 40–80 m/min, heavy flood coolant and constant feed to avoid work-hardened glazing; nitrogen raises cutting forces about 15 % over 316L.
Can 1.4910 be welded?
GTAW/GMAW/SAW with 316L or 19-13-4 N-bearing filler, low heat input and interpass < 150 °C; the boron addition increases hot-cracking sensitivity, so restrict dilution, avoid wide weave and keep S+P low.
Can 1.4910 be formed, bent or molded?
Hot work 1150–1200 °C with a narrow window (boron lowers incipient-melting margin, avoid > 1200 °C); cold forms well but work-hardens fast — allow interstage solution anneal at 1050–1100 °C with rapid cooling.
1.4910 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 for weldability and creep stability | 0.02 – 0.04 | 0.03 |
| Si | ≤ 0.5 | 0.35 |
| Mn | ≤ 2 | 1.4 |
| P | ≤ 0.04 | 0.02 |
| S | ≤ 0.02 | 0 |
| Cr | 16.5 – 18.5 | 17.5 |
| Ni | 12 – 14 | 13 |
| Mo | 2 – 3 | 2.5 |
| Nsolid-solution strengthening | 0.1 – 0.18 | 0.14 |
| B15–50 ppm boron for creep-rupture strength | 0 – 0.01 | 0 |
| Nbrestricted in some deliveries | ≤ 0.1 | |
| Fe | balance |
What surface finishes work on 1.4910?
Pickle and passivate (ASTM A967 citric/nitric) after hot work or welding; electropolishing gives the best surface for steam and nuclear cleanliness; anodizing is not applicable.
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 1.4910 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- X3CrNiMoBN17-13-3
How much does 1.4910 cost?
1.4910 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.
1.4910 — frequently asked
What is 1.4910 used for?
1.4910 is typically used for nuclear control rod components, neutron absorber assemblies, reactor internals and spent fuel storage racks. In short: boron-bearing nuclear austenitic; neutron absorption plus 316-class corrosion; nitrogen-strengthened over 316L.
What is the yield strength of 1.4910?
1.4910 has a typical yield strength of 300 MPa (43.5 ksi) and a tensile strength of 620 MPa (89.9 ksi) — weaker than 68% of stainless steel grades. Strength varies by condition: see the 5 listed tempers.
Is 1.4910 easy to machine?
Not especially — machinability is rated fair (38/100, better than 63% of stainless steel grades). Machine like 316LN — rigid setup, positive-rake sharp carbide, 40–80 m/min, heavy flood coolant and constant feed to avoid work-hardened glazing; nitrogen raises cutting forces about 15 % over 316L.
Can 1.4910 be welded?
Yes — weldability is rated very good (70/100). GTAW/GMAW/SAW with 316L or 19-13-4 N-bearing filler, low heat input and interpass < 150 °C; the boron addition increases hot-cracking sensitivity, so restrict dilution, avoid wide weave and keep S+P low.
What surface finishes work on 1.4910?
Pickle and passivate (ASTM A967 citric/nitric) after hot work or welding; electropolishing gives the best surface for steam and nuclear cleanliness; anodizing is not applicable.
Can 1.4910 be formed, bent or molded?
Hot work 1150–1200 °C with a narrow window (boron lowers incipient-melting margin, avoid > 1200 °C); cold forms well but work-hardens fast — allow interstage solution anneal at 1050–1100 °C with rapid cooling.
What is the maximum service temperature of 1.4910?
1.4910 is rated for continuous use to about 620°C (1,148 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 1.4910-SA and 1.4910 SA-CD?
SA is the default condition — standard supply condition for plate, bar, tube and forgings — maximum corrosion resistance, ductility and creep design allowables. SA-CD: bright cold-drawn bar for machined fasteners and shafts — higher yield and better surface, slightly reduced ductility. Yield strength is 300 MPa in SA versus 480 MPa in SA-CD.
How much does 1.4910 cost?
1.4910 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 10302 — Creep resisting steels, nickel and cobalt alloys — CEN (2008)
- EN 10222-5 — Steel forgings for pressure purposes, martensitic/austenitic and austenitic-ferritic stainless steels — CEN (2017)
- EN 10088-1 — Stainless steels: list of stainless steels — CEN (2014)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- Outokumpu Corrosion Handbook — Outokumpu (2015)
- Austenitic creep-resistant stainless (316LN/boron-modified) data sheets — Sandvik / Böhler (2020)
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.