Stainless Steel 1.4806 Aged
Heat-treated state
EN 1.4806
Aged = thermally aged / service-exposed
Reference condition for life assessment: secondary carbide precipitation raises hardness and strength but strongly reduces room-temperature ductility and impact energy.
Values for the Aged condition
Other 1.4806 tempers and conditions
1.4806 is listed in 3 conditions; see the grade overview at 1.4806.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Solution annealed ~1050–1150 °C, air cooled | Optional homogenising/stress-relief treatment used when machining allowance is large or dimensional stability before service is required. | 235 | 450 | 14 | 170 HB | 1.7 % IACS |
ACDefault Spheroidize annealed | Standard supply condition for furnace fixtures, trays and baskets — heat-resistant castings are normally used as-cast. | 250 | 470 | 10 | 180 HB | 1.7 % IACS |
AgedThis page Thermally aged / service-exposed | Reference condition for life assessment: secondary carbide precipitation raises hardness and strength but strongly reduces room-temperature ductility and impact energy. | 300 | 500 | 4 | 15 HRC | 1.8 % IACS |
What is 1.4806 Aged?
1.4806 Aged is 1.4806 heat treated to Aged — reference condition for life assessment: secondary carbide precipitation raises hardness and strength but strongly reduces room-temperature ductility and impact energy. 1.4806 Aged has a yield strength of 300 MPa (43.5 ksi) and a tensile strength of 500 MPa (72.5 ksi) — weaker than 68% of stainless steel grades. Elongation at break is 4% and the elastic modulus is 170 GPa (24.7 Msi). 1.4806 Aged has a density of 7.95 g/cm³ (0.287 lb/in³), heavier than 81% of stainless steel grades. It melts at 1,330°C (2,426 °F). AC is the default condition FabDigit quotes; Aged is available on request or by drawing note.
Advantages
- High service temperature — 1,050°C (1,922 °F), better than 91% of stainless steel grades
Limitations
- Low stiffness — 170 GPa (24.7 Msi), worse than 100% of stainless steel grades
- Limited ductility — 4%, worse than 100% of stainless steel grades
- Limited formability — 3/100, worse than 100% of stainless steel grades
- Low fracture toughness — 35 MPa·√m (31.9 ksi·√in), worse than 98% of stainless steel grades
- Difficult to machine — 20/100, worse than 98% of stainless steel grades
1.4806 Aged properties
Typical room-temperature values for 1.4806 Aged; 22 are specific to this condition. Other listed values are 1.4806 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
1.4806 Aged has a density of 7.95 g/cm³ (0.287 lb/in³), heavier than 81% of stainless steel grades. It melts at 1,330°C (2,426 °F).
Mechanical16
1.4806 Aged has a yield strength of 300 MPa (43.5 ksi) and a tensile strength of 500 MPa (72.5 ksi) — weaker than 68% of stainless steel grades. Elongation at break is 4% and the elastic modulus is 170 GPa (24.7 Msi).
Thermal6
1.4806 Aged is rated for continuous service to 1,050°C (1,922 °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 15 µm/m·K (8.33 µin/in·°F).
Electrical3
1.4806 Aged conducts electricity at 1.8 % IACS, worse than 87% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is fair (45/100), worse than 85% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4806 Aged takes about 72 MJ of energy and emits 5.5 kg of CO₂ — more than 83% of stainless steel grades. Typical recycled content is 70%.
Manufacturability8
1.4806 Aged's machinability is poor (20/100, worse than 98% of stainless steel grades); weldability poor (20/100); formability not recommended (3/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1.4806 Aged
Is 1.4806 easy to machine?
Difficult: hard eutectic carbides and a work-hardening austenite matrix — use rigid setups, positive-rake carbide or ceramic inserts, 15–35 m/min, heavy feed, flood coolant and avoid dwelling.
Can 1.4806 be welded?
Weld with matching 35Ni-17Cr or Ni-base (ERNiCr-3/AWS ENiCrFe) filler, preheat 150–300 °C, low heat input and slow cooling; service-aged parts are highly crack-prone and should be buttered or locally solution treated.
Can 1.4806 be formed, bent or molded?
Cast-only grade: sand, shell or investment cast for fixtures and centrifugally cast for tubes; design generous fillets and uniform sections because low RT ductility offers little tolerance for casting stress.
What surface finishes work on 1.4806?
Normally supplied shot-blasted or as-cast with the protective Cr/Si oxide scale intact; grind only where dimensionally needed, avoid plating or painting, and never use S-containing marking or cutting compounds before high-temperature service.
1.4806 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 |
|---|---|---|
| CASTM HT allows 0.35–0.75 | 0.3 – 0.5 | 0.4 |
| SiSi improves oxidation/carburization resistance | 1 – 2.5 | 1.8 |
| Mn | ≤ 2 | 1 |
| P | ≤ 0.04 | — |
| S | ≤ 0.03 | — |
| Cr | 16 – 19 | 17.5 |
| Ni | 33 – 37 | 35 |
| Moresidual limit | ≤ 0.5 | — |
| Fe | balance | — |
1.4806 Aged — frequently asked
What is 1.4806 Aged used for?
1.4806 Aged is typically used for furnace rollers and fixtures, heat-treatment trays and radiant tube supports. In short: 35Ni carburization resistance; thermal cycling furnace castings; cast only, low ductility.
What is the yield strength of 1.4806 Aged?
1.4806 Aged has a typical yield strength of 300 MPa (43.5 ksi) and a tensile strength of 500 MPa (72.5 ksi) — weaker than 68% of stainless steel grades. Strength varies by condition: see the 3 listed tempers.
Is 1.4806 Aged easy to machine?
Not especially — machinability is rated poor (20/100, worse than 98% of stainless steel grades). Difficult: hard eutectic carbides and a work-hardening austenite matrix — use rigid setups, positive-rake carbide or ceramic inserts, 15–35 m/min, heavy feed, flood coolant and avoid dwelling.
Can 1.4806 Aged be welded?
Not readily — weldability is rated poor (20/100). Weld with matching 35Ni-17Cr or Ni-base (ERNiCr-3/AWS ENiCrFe) filler, preheat 150–300 °C, low heat input and slow cooling; service-aged parts are highly crack-prone and should be buttered or locally solution treated.
What surface finishes work on 1.4806 Aged?
Normally supplied shot-blasted or as-cast with the protective Cr/Si oxide scale intact; grind only where dimensionally needed, avoid plating or painting, and never use S-containing marking or cutting compounds before high-temperature service.
Can 1.4806 Aged be formed, bent or molded?
Cast-only grade: sand, shell or investment cast for fixtures and centrifugally cast for tubes; design generous fillets and uniform sections because low RT ductility offers little tolerance for casting stress.
What is the maximum service temperature of 1.4806 Aged?
1.4806 Aged is rated for continuous use to about 1,050°C (1,922 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 1.4806-AC and 1.4806 Aged?
AC is the default condition — standard supply condition for furnace fixtures, trays and baskets — heat-resistant castings are normally used as-cast. Aged: reference condition for life assessment: secondary carbide precipitation raises hardness and strength but strongly reduces room-temperature ductility and impact energy. Yield strength is 250 MPa in AC versus 300 MPa in Aged.
Sources
- EN 10295 — Heat resistant steel castings — CEN (2002)
- ASTM A297/A297M — Steel Castings, Iron-Chromium-Nickel, Heat Resistant, for General Application — ASTM (2019)
- ASTM A608/A608M — Centrifugally Cast Iron-Chromium-Nickel High-Alloy Tubing for Pressure Application at High Temperatures — ASTM (2018)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys (heat-resistant castings) — ASM International (1990)
- Steel Castings Handbook — Steel Founders' Society of America (1995)
- Heat-resistant furnace alloy castings (HT / GX40NiCrSi35-17) datasheets — various foundries (2023)
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.