Stainless Steel 1.4945
EN 1.4945
Tungsten and niobium alloyed, nitrogen-strengthened austenitic stainless designed for high creep strength and oxidation resistance at elevated temperatures, used in power generation and turbine applications.
Reference datasheet — 1.4945 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
1.4945 tempers and conditions
1.4945 is supplied in 3 conditions, soft to hard. +AT 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 |
|---|---|---|---|---|---|---|
+ATDefault Solution annealed | Standard stocked condition for tube, pipe and bar: maximum ductility, best weld and bend behaviour, adequate creep strength for service up to ~700 °C. | 320 | 680 | 40 | 175 HB | — |
Warm worked | Choose for superheater/reheater tubing where the substructure introduced by warm working gives markedly higher creep rupture strength at 600–700 °C. | 470 | 780 | 28 | 21 HRC | — |
Solution annealed then cold drawn bar/tube | Cold-drawn bar and small-diameter tube for machined turbine and fastener parts where dimensional accuracy and higher room-temperature strength matter more than ductility. | 600 | 830 | 20 | 24 HRC | — |
What is 1.4945?
Tungsten and niobium alloyed, nitrogen-strengthened austenitic stainless designed for high creep strength and oxidation resistance at elevated temperatures, used in power generation and turbine applications. 1.4945 has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 68% of stainless steel grades. It melts at 1,390°C (2,534 °F). 1.4945 has a yield strength of 320 MPa (46.4 ksi) and a tensile strength of 680 MPa (98.6 ksi) — weaker than 60% of stainless steel grades. Elongation at break is 40% and the elastic modulus is 197 GPa (28.6 Msi).
What is 1.4945 used for?
- gas turbine components
- power plant superheater tubing
- high-temperature fasteners
- boiler components
Advantages
- Tough — resists crack growth — 200 MPa·√m (182 ksi·√in), better than 86% of stainless steel grades
Limitations
- Needs corrosion protection — 50/100, worse than 78% of stainless steel grades
- Low electrical conductivity — 2 % IACS, worse than 77% of stainless steel grades
1.4945 properties
Typical room-temperature values for 1.4945-+AT; bars are the position among stainless steel grades.
Physical3
1.4945 has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 68% of stainless steel grades. It melts at 1,390°C (2,534 °F).
Mechanical16
1.4945 has a yield strength of 320 MPa (46.4 ksi) and a tensile strength of 680 MPa (98.6 ksi) — weaker than 60% of stainless steel grades. Elongation at break is 40% and the elastic modulus is 197 GPa (28.6 Msi).
Thermal6
1.4945 is rated for continuous service to 700°C (1,292 °F). It conducts heat at 14.5 W/m·K (8.38 BTU/hr·ft·°F), worse than 72% of stainless steel grades. Thermal expansion is 16 µm/m·K (8.89 µin/in·°F).
Electrical3
1.4945 conducts electricity at 2 % IACS, worse than 77% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is fair (50/100), worse than 78% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4945 takes about 57 MJ of energy and emits 5.2 kg of CO₂ — more than 62% of stainless steel grades. Typical recycled content is 55%.
Manufacturability7
1.4945's machinability is poor (32/100, worse than 62% of stainless steel grades); weldability good (65/100); formability good (60/100).
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. 1.4945 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1.4945
Is 1.4945 easy to machine?
Machine like a nitrogen-alloyed austenitic: rigid setups, sharp positive-rake carbide, heavy positive feed to cut under the work-hardened layer, generous high-pressure coolant, ~30–40 % of AISI 1212 speeds.
Can 1.4945 be welded?
Weld with GTAW/SMAW using matching or Nb-stabilised high-Ni filler, low heat input and interpass below ~150 °C; post-weld solution annealing restores properties for warm-worked tubing.
Can 1.4945 be formed, bent or molded?
Hot work at roughly 1150–1200 °C and solution anneal at ~1150–1200 °C with rapid cooling; cold and warm forming need high forces and generous allowance for springback due to strong work hardening.
1.4945 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 |
|---|---|---|
| CX6 designation | 0.04 – 0.08 | 0.06 |
| Si | ≤ 0.6 | 0.4 |
| Mn | ≤ 2 | 1.2 |
| Pimpurity limit | ≤ 0.04 | |
| Simpurity limit | ≤ 0.02 | |
| Cr | 15.5 – 17.5 | 16 |
| Ni | 15.5 – 17.5 | 16 |
| Wsolid-solution creep strengthener | 1 – 2 | 1.5 |
| NbMX carbonitride precipitation, stabilisation | 0.4 – 1 | 0.7 |
| Nnitrogen strengthening | 0.05 – 0.15 | 0.1 |
| Fe | balance |
What surface finishes work on 1.4945?
Pickle and passivate (or electropolish) after hot work and welding to restore the oxide-free passive film; no anodising — protective Cr₂O₃/oxide scale forms in service.
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 1.4945 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- X6CrNiWNbN16-16
How much does 1.4945 cost?
1.4945 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.
1.4945 — frequently asked
What is 1.4945 used for?
1.4945 is typically used for gas turbine components, power plant superheater tubing, high-temperature fasteners and boiler components. In short: W and Nb creep-resistant austenitic; 700 °C turbine grade; limited mill availability.
What is the yield strength of 1.4945?
1.4945 has a typical yield strength of 320 MPa (46.4 ksi) and a tensile strength of 680 MPa (98.6 ksi) — weaker than 60% of stainless steel grades. Strength varies by condition: see the 3 listed tempers.
Is 1.4945 easy to machine?
Not especially — machinability is rated poor (32/100, worse than 62% of stainless steel grades). Machine like a nitrogen-alloyed austenitic: rigid setups, sharp positive-rake carbide, heavy positive feed to cut under the work-hardened layer, generous high-pressure coolant, ~30–40 % of AISI 1212 speeds.
Can 1.4945 be welded?
Yes — weldability is rated good (65/100). Weld with GTAW/SMAW using matching or Nb-stabilised high-Ni filler, low heat input and interpass below ~150 °C; post-weld solution annealing restores properties for warm-worked tubing.
What surface finishes work on 1.4945?
Pickle and passivate (or electropolish) after hot work and welding to restore the oxide-free passive film; no anodising — protective Cr₂O₃/oxide scale forms in service.
Can 1.4945 be formed, bent or molded?
Hot work at roughly 1150–1200 °C and solution anneal at ~1150–1200 °C with rapid cooling; cold and warm forming need high forces and generous allowance for springback due to strong work hardening.
What is the maximum service temperature of 1.4945?
1.4945 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.
How much does 1.4945 cost?
1.4945 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 10088-1 — Stainless steels: list of stainless steels — CEN (2014)
- EN 10216-5 — Seamless steel tubes for pressure purposes: stainless steel tubes — CEN (2021)
- 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)
- SMM / Mysteel (2025)
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.