Stainless Steel 1.4910-SA (Solution annealed)
Heat-treated state · default condition
EN 1.4910
Standard supply condition for plate, bar, tube and forgings — maximum corrosion resistance, ductility and creep design allowables.
Values for the SA condition
Other 1.4910 tempers and conditions
1.4910 is listed in 5 conditions; see the grade overview at 1.4910.
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 |
SADefaultThis page 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 |
What is 1.4910-SA?
1.4910-SA is 1.4910 heat treated to SA — standard supply condition for plate, bar, tube and forgings — maximum corrosion resistance, ductility and creep design allowables. 1.4910-SA 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). 1.4910-SA 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).
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-SA properties
Typical room-temperature values for 1.4910-SA; 14 are specific to this condition. Other listed values are 1.4910 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
1.4910-SA 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-SA 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-SA 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-SA 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-SA 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-SA'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. Confirm any required mill or lot documentation when quoting.
Working with 1.4910-SA
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.
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.
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 | — |
1.4910-SA — frequently asked
What is 1.4910-SA used for?
1.4910-SA 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-SA?
1.4910-SA 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-SA 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-SA 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-SA?
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-SA 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-SA?
1.4910-SA 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.
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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.