Stainless Steel 1.4606
EN 1.4606
1.4606 (X5NiCrTiMoVB25-15-2, S66286) is an austenitic Ni-Cr-Ti-Mo-V-B precipitation-hardening stainless in the A-286 family, hardened by Ti/Al-bearing precipitates rather than martensite.
Reference datasheet — 1.4606 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 +P880 condition
1.4606 tempers and conditions
1.4606 is supplied in 4 conditions, soft to hard. +P880 is the default FabDigit quotes; the values on this page are for it.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Solution annealed | Soft supply condition for machining, cold forming or forging before the customer ages the part. | 300 | 690 | 45 | 180 HB | — |
Solution treated ~965–985 °C + precipitation hardened ~720 °C/16 h | Coarser-grain creep-optimised condition for long-term service above ~600 °C (turbine discs, hot bolting) at slightly lower RT strength. | 640 | 960 | 22 | 30 HRC | — |
+P880Default Solution treated ~880–900 °C + precipitation hardened ~720 °C/16 h | Standard high-strength condition for bolts, studs and rotating parts up to ~650 °C where room-temperature yield and fatigue matter most. | 700 | 1,010 | 20 | 32 HRC | — |
Cold drawn/cold worked, then precipitation hardened | Fastener wire and small bar where extra cold work before ageing raises strength beyond the standard aged level. | 950 | 1,200 | 12 | 38 HRC | — |
What is 1.4606?
1.4606 (X5NiCrTiMoVB25-15-2, S66286) is an austenitic Ni-Cr-Ti-Mo-V-B precipitation-hardening stainless in the A-286 family, hardened by Ti/Al-bearing precipitates rather than martensite. It is used where elevated-temperature strength and creep resistance are needed together with corrosion resistance: 700 MPa yield, 1010 MPa tensile, 20 % elongation and 32 HRC (310 HB) in the default condition, with service to 650 °C and +AT, +P880, +P980 and CD+P conditions on file as bar, wire and forgings. Machinability (25/100) and formability (20/100) are poor and welded joints need re-solution and re-aging. 1.4980 is the same alloy under its other EN number. 1.4606 has a density of 7.94 g/cm³ (0.287 lb/in³), heavier than 78% of stainless steel grades. It melts at 1,370°C (2,498 °F). 1.4606 has a yield strength of 700 MPa (102 ksi) and a tensile strength of 1,010 MPa (146 ksi) — stronger than 92% of stainless steel grades. Elongation at break is 20% and the elastic modulus is 201 GPa (29.2 Msi).
What is 1.4606 used for?
- turbine fasteners
- gas turbine hardware
- high-temperature bolting
Advantages
- High strength — 700 MPa (102 ksi), better than 92% of stainless steel grades
Limitations
- High embodied carbon — 6.5 kg CO₂/kg, worse than 93% of stainless steel grades
- Difficult to machine — 25/100, worse than 88% of stainless steel grades
- Limited formability — 20/100, worse than 86% of stainless steel grades
- Low electrical conductivity — 1.9 % IACS, worse than 84% of stainless steel grades
- Limited ductility — 20%, worse than 79% of stainless steel grades
1.4606 properties
Typical room-temperature values for 1.4606-+P880; bars are the position among stainless steel grades.
Physical3
1.4606 has a density of 7.94 g/cm³ (0.287 lb/in³), heavier than 78% of stainless steel grades. It melts at 1,370°C (2,498 °F).
Mechanical16
1.4606 has a yield strength of 700 MPa (102 ksi) and a tensile strength of 1,010 MPa (146 ksi) — stronger than 92% of stainless steel grades. Elongation at break is 20% and the elastic modulus is 201 GPa (29.2 Msi).
Thermal6
1.4606 is rated for continuous service to 650°C (1,202 °F). It conducts heat at 14 W/m·K (8.09 BTU/hr·ft·°F), worse than 80% of stainless steel grades. Thermal expansion is 16.4 µm/m·K (9.11 µin/in·°F).
Electrical3
1.4606 conducts electricity at 1.9 % IACS, worse than 84% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (60/100), worse than 58% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4606 takes about 100 MJ of energy and emits 6.5 kg of CO₂ — more than 98% of stainless steel grades. Typical recycled content is 30%.
Manufacturability7
1.4606's machinability is poor (25/100, worse than 88% of stainless steel grades); weldability fair (45/100); formability poor (20/100).
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. 1.4606 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1.4606
Is 1.4606 easy to machine?
Machine preferably in +AT condition with rigid setups, positive-rake carbide or ceramic tools, heavy constant feed and flood coolant; the alloy work-hardens fast and rubbing/dwell instantly glazes the surface.
Can 1.4606 be welded?
GTAW/EBW with matching A-286 filler in the solution-annealed state, low heat input and no preheat; re-solution + re-age after welding to avoid strain-age (HAZ) cracking in thick or restrained joints.
Can 1.4606 be formed, bent or molded?
Hot work 1090–980 °C then water quench; cold forming (thread rolling, heading) only in the +AT condition with high forming loads and interstage anneals — aged material is essentially non-formable.
1.4606 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 |
|---|---|---|
| C | 0.03 – 0.08 | 0.05 |
| Si | ≤ 1 | 0.4 |
| Mn | ≤ 2 | 1.2 |
| P | ≤ 0.03 | |
| S | ≤ 0.02 | |
| Cr | 13.5 – 16 | 14.8 |
| Ni | 24 – 27 | 25.5 |
| Mo | 1 – 1.5 | 1.25 |
| Tiγ′ (Ni3(Ti,Al)) former | 1.9 – 2.35 | 2.1 |
| V | 0.1 – 0.5 | 0.3 |
| Al | ≤ 0.35 | 0.2 |
| Bgrain-boundary strengthening | 0 – 0.01 | 0.01 |
| Febalance ≈ 53 % | balance |
What surface finishes work on 1.4606?
Passivate per ASTM A967 after machining; grinding/electropolishing gives a bright finish, and silver, MoS2 or Cd-free dry-film coatings are used on fasteners to stop galling at temperature.
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 1.4606 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- X5NiCrTiMoVB25-15-2
- Similar grades
- 1.4980S66286
How much does 1.4606 cost?
1.4606 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.
1.4606 — frequently asked
What is 1.4606 used for?
1.4606 is typically used for turbine fasteners, gas turbine hardware and high-temperature bolting. In short: austenitic PH, 650 °C; creep-resistant fastener alloy; non-magnetic when aged.
What is the yield strength of 1.4606?
1.4606 has a typical yield strength of 700 MPa (102 ksi) and a tensile strength of 1,010 MPa (146 ksi) — stronger than 92% of stainless steel grades. Strength varies by condition: see the 4 listed tempers.
Is 1.4606 easy to machine?
Not especially — machinability is rated poor (25/100, worse than 88% of stainless steel grades). Machine preferably in +AT condition with rigid setups, positive-rake carbide or ceramic tools, heavy constant feed and flood coolant; the alloy work-hardens fast and rubbing/dwell instantly glazes the surface.
Can 1.4606 be welded?
With care — weldability is rated fair (45/100). GTAW/EBW with matching A-286 filler in the solution-annealed state, low heat input and no preheat; re-solution + re-age after welding to avoid strain-age (HAZ) cracking in thick or restrained joints.
What surface finishes work on 1.4606?
Passivate per ASTM A967 after machining; grinding/electropolishing gives a bright finish, and silver, MoS2 or Cd-free dry-film coatings are used on fasteners to stop galling at temperature.
Can 1.4606 be formed, bent or molded?
Hot work 1090–980 °C then water quench; cold forming (thread rolling, heading) only in the +AT condition with high forming loads and interstage anneals — aged material is essentially non-formable.
What is the maximum service temperature of 1.4606?
1.4606 is rated for continuous use to about 650°C (1,202 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does 1.4606 cost?
1.4606 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 10269 — Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties (X5NiCrTiMoVB25-15-2) — CEN (2013)
- ASTM A453/A453M Grade 660 — Bolting with Expansion Coefficients Comparable to Austenitic Stainless Steels — ASTM (2021)
- AMS 5737 / AMS 5525 — Alloy A-286 bars and sheet — SAE International (2019)
- ASM Specialty Handbook: Heat-Resistant Materials — ASM International (1997)
- MMPDS — Metallic Materials Properties Development and Standardization, A-286 chapter — Battelle/FAA (2023)
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.