Stainless Steel 1.4859
EN 1.4859
Low-carbon, niobium-stabilized 32Ni-20Cr cast austenitic alloy offering good weldability and resistance to intergranular corrosion and thermal cycling, used for glass-industry and chemical-process castings.
Reference datasheet — 1.4859 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 ST condition
1.4859 tempers and conditions
1.4859 is supplied in 3 conditions, soft to hard. ST 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 |
|---|---|---|---|---|---|---|
STDefault Solution annealed | Standard supply condition for pressure-containing and welded castings; dissolves carbide networks and gives best ductility, toughness and intergranular-corrosion resistance. | 235 | 480 | 28 | 150 HB | — |
Spheroidize annealed | Chosen for purely high-temperature furnace/glass-plant parts where the service temperature itself re-solutions the structure and cost matters more than as-delivered ductility. | 245 | 470 | 20 | 160 HB | 1.7 % IACS |
As-welded deposit | Condition of weld-repaired or fabricated assemblies where re-solution annealing is impractical; Nb stabilization keeps the HAZ resistant to sensitization. | 250 | 460 | 18 | 165 HB | 1.7 % IACS |
Supply forms, finishes and certifications
Ways 1.4859 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-ST | Centrifugally cast tube, solution annealed | Surface finish |
What is 1.4859?
Low-carbon, niobium-stabilized 32Ni-20Cr cast austenitic alloy offering good weldability and resistance to intergranular corrosion and thermal cycling, used for glass-industry and chemical-process castings. 1.4859 has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 68% of stainless steel grades. It melts at 1,330°C (2,426 °F). 1.4859 has a yield strength of 235 MPa (34.1 ksi) and a tensile strength of 480 MPa (69.6 ksi) — weaker than 98% of stainless steel grades. Elongation at break is 28% and the elastic modulus is 172 GPa (24.9 Msi).
What is 1.4859 used for?
- glass manufacturing rollers and molds
- chemical process vessel internals
- high-temperature valve and pump bodies
Advantages
- High service temperature — 1,050°C (1,922 °F), better than 91% of stainless steel grades
Limitations
- Low stiffness — 172 GPa (24.9 Msi), worse than 99% of stainless steel grades
- Low strength — 235 MPa (34.1 ksi), worse than 98% of stainless steel grades
- Low electrical conductivity — 1.7 % IACS, worse than 93% of stainless steel grades
- Limited formability — 15/100, worse than 91% of stainless steel grades
- Hard to polish — 55/100, worse than 89% of stainless steel grades
1.4859 properties
Typical room-temperature values for 1.4859-ST; bars are the position among stainless steel grades.
Physical3
1.4859 has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 68% of stainless steel grades. It melts at 1,330°C (2,426 °F).
Mechanical14
1.4859 has a yield strength of 235 MPa (34.1 ksi) and a tensile strength of 480 MPa (69.6 ksi) — weaker than 98% of stainless steel grades. Elongation at break is 28% and the elastic modulus is 172 GPa (24.9 Msi).
Thermal6
1.4859 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
1.4859 conducts electricity at 1.7 % IACS, worse than 93% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (68/100), better than 63% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4859 takes about 78 MJ of energy and emits 5.8 kg of CO₂ — more than 87% of stainless steel grades. Typical recycled content is 55%.
Manufacturability7
1.4859's machinability is poor (28/100, worse than 79% of stainless steel grades); weldability very good (72/100); formability poor (15/100).
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. 1.4859 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1.4859
Is 1.4859 easy to machine?
Machine like a high-Ni austenitic: rigid setup, sharp positive-rake carbide, low speed (~30–60 m/min) and heavy positive feed to cut under the work-hardened skin, with flood coolant.
Can 1.4859 be welded?
Very good for a heat-resistant cast grade — GTAW/SMAW with matching 32-20Nb or Ni-base (ERNiCr-3) filler, no preheat needed, keep interpass below ~150 °C and avoid post-weld holding in the 650–900 °C range.
Can 1.4859 be formed, bent or molded?
Supplied only as sand, investment or centrifugal castings; provide generous risering for the wide freezing range and design uniform sections to limit hot tearing.
1.4859 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 | 0.05 – 0.15 | 0.1 |
| Siraises oxidation/carburization resistance | 1 – 2 | 1.5 |
| Mn | ≤ 1.5 | 1 |
| Pimpurity limit | ≤ 0.04 | — |
| Simpurity limit | ≤ 0.03 | — |
| Cr | 19 – 21 | 20 |
| Ni | 31 – 33 | 32 |
| Nbstabilizer against intergranular corrosion; A351 CT15C uses 0.5–1.5 | 0.8 – 1.8 | 1.2 |
| Fe | balance | — |
What surface finishes work on 1.4859?
Blast plus pickle/passivate to remove casting scale; ground and polished surfaces improve oxidation life, and no plating or anodizing is used 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 1.4859 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- GX10NiCrSiNb32-20
How much does 1.4859 cost?
1.4859 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.
1.4859 — frequently asked
What is 1.4859 used for?
1.4859 is typically used for glass manufacturing rollers and molds, chemical process vessel internals and high-temperature valve and pump bodies. In short: most weldable of family; highest ductility cast grade; low-carbon Nb-stabilized.
What is the yield strength of 1.4859?
1.4859 has a typical yield strength of 235 MPa (34.1 ksi) and a tensile strength of 480 MPa (69.6 ksi) — weaker than 98% of stainless steel grades. Strength varies by condition: see the 3 listed tempers.
Is 1.4859 easy to machine?
Not especially — machinability is rated poor (28/100, worse than 79% of stainless steel grades). Machine like a high-Ni austenitic: rigid setup, sharp positive-rake carbide, low speed (~30–60 m/min) and heavy positive feed to cut under the work-hardened skin, with flood coolant.
Can 1.4859 be welded?
Yes — weldability is rated very good (72/100). Very good for a heat-resistant cast grade — GTAW/SMAW with matching 32-20Nb or Ni-base (ERNiCr-3) filler, no preheat needed, keep interpass below ~150 °C and avoid post-weld holding in the 650–900 °C range.
What surface finishes work on 1.4859?
Blast plus pickle/passivate to remove casting scale; ground and polished surfaces improve oxidation life, and no plating or anodizing is used in service.
Can 1.4859 be formed, bent or molded?
Supplied only as sand, investment or centrifugal castings; provide generous risering for the wide freezing range and design uniform sections to limit hot tearing.
What is the maximum service temperature of 1.4859?
1.4859 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 1.4859-ST and 1.4859-AW?
ST is the default condition — standard supply condition for pressure-containing and welded castings; dissolves carbide networks and gives best ductility, toughness and intergranular-corrosion resistance. AW: condition of weld-repaired or fabricated assemblies where re-solution annealing is impractical; Nb stabilization keeps the HAZ resistant to sensitization. Yield strength is 235 MPa in ST versus 250 MPa in AW.
How much does 1.4859 cost?
1.4859 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 A351/A351M — Castings, Austenitic, for Pressure-Containing Parts (grade CT15C) — ASTM International (2018)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels, and High-Performance Alloys (heat-resistant castings) — ASM International (1990)
- ASM Handbook Vol. 13B — Corrosion: Materials — ASM International (2005)
- Heat-resistant cast alloy 32Ni-20Cr-Nb data sheets — foundry producers (2022)
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.