Stainless Steel 1.4806
EN 1.4806
1.4806 (GX40NiCrSi35-17, ASTM A297 HT) is a very high nickel (35Ni-17Cr) silicon-bearing cast heat-resistant austenitic steel, supplied as-cast, solution annealed, centrifugally cast or aged.
Reference datasheet — 1.4806 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 AC condition
1.4806 tempers and conditions
1.4806 is supplied in 3 conditions, soft to hard. AC 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 |
|---|---|---|---|---|---|---|
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 |
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 |
Supply forms, finishes and certifications
Ways 1.4806 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
CC | Centrifugally cast tube / cylinder, as-cast | Surface finish |
What is 1.4806?
1.4806 (GX40NiCrSi35-17, ASTM A297 HT) is a very high nickel (35Ni-17Cr) silicon-bearing cast heat-resistant austenitic steel, supplied as-cast, solution annealed, centrifugally cast or aged. The high nickel content gives resistance to carburization and thermal cycling, so it is used for furnace rollers, trays and radiant tube supports at temperatures up to 1050 °C. Room-temperature properties are 250 MPa yield, 470 MPa tensile, only 10 % elongation and 180 HB, so parts have little tolerance for impact or casting stress, and machinability is about 25. Where higher creep strength is needed, the niobium-stabilized 1.4807 is the direct alternative. 1.4806 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). 1.4806 has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 470 MPa (68.2 ksi) — weaker than 91% of stainless steel grades. Elongation at break is 10% and the elastic modulus is 168 GPa (24.4 Msi).
What is 1.4806 used for?
- furnace rollers and fixtures
- heat-treatment trays
- radiant tube supports
Advantages
- High service temperature — 1,050°C (1,922 °F), better than 91% of stainless steel grades
Limitations
- Low stiffness — 168 GPa (24.4 Msi), worse than 100% of stainless steel grades
- Limited ductility — 10%, worse than 98% of stainless steel grades
- Low fracture toughness — 35 MPa·√m (31.9 ksi·√in), worse than 98% of stainless steel grades
- Hard to polish — 45/100, worse than 96% of stainless steel grades
- Limited formability — 10/100, worse than 95% of stainless steel grades
1.4806 properties
Typical room-temperature values for 1.4806-AC; bars are the position among stainless steel grades.
Physical3
1.4806 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 has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 470 MPa (68.2 ksi) — weaker than 91% of stainless steel grades. Elongation at break is 10% and the elastic modulus is 168 GPa (24.4 Msi).
Thermal6
1.4806 is rated for continuous service to 1,050°C (1,922 °F). It conducts heat at 13 W/m·K (7.51 BTU/hr·ft·°F), worse than 85% of stainless steel grades. Thermal expansion is 15 µm/m·K (8.33 µin/in·°F).
Electrical3
1.4806 conducts electricity at 1.7 % IACS, worse than 93% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (55/100), worse than 71% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4806 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's machinability is poor (25/100, worse than 88% of stainless steel grades); weldability fair (40/100); formability not recommended (10/100).
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. 1.4806 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1.4806
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.
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 |
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.
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 1.4806 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- GX40NiCrSi35-17
- Similar grades
- A297 HT
How much does 1.4806 cost?
1.4806 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.
1.4806 — frequently asked
What is 1.4806 used for?
1.4806 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?
1.4806 has a typical yield strength of 250 MPa (36.3 ksi) and a tensile strength of 470 MPa (68.2 ksi) — weaker than 91% of stainless steel grades. Strength varies by condition: see the 3 listed tempers.
Is 1.4806 easy to machine?
Not especially — machinability is rated poor (25/100, worse than 88% 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 be welded?
With care — weldability is rated fair (40/100). 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?
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 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?
1.4806 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.
How much does 1.4806 cost?
1.4806 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 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; 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.