Stainless Steel 1.4887
EN 1.4887
EN 1.4887 (X10NiCrSiNb35-22) is a niobium-stabilized 35Ni-22Cr heat-resistant alloy with elevated silicon, supplied mainly as static and centrifugal castings and also in wrought bar and tube.
Reference datasheet — 1.4887 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 SA condition
1.4887 tempers and conditions
1.4887 is supplied in 5 conditions, soft to hard. SA is the default FabDigit quotes; the values on this page are for it.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
As-Cast, statically (sand/investment) cast | For furnace rolls, trays, burner parts and fittings where section geometry rules out centrifugal casting. | 230 | 450 | 10 | 180 HB | 1.7 % IACS |
As-Cast, centrifugally cast tube | Pick for reformer/cracking furnace tubes and radiant tubes — columnar as-cast structure gives the best creep-rupture life. | 240 | 480 | 12 | 185 HB | 1.7 % IACS |
SADefault Solution Annealed | Standard wrought delivery condition — best ductility and toughness for formed and welded furnace parts. | 250 | 560 | 35 | 170 HB | 1.7 % IACS |
As-welded deposit | Property set for weld repairs and tube-to-tube joints made with matching Nb-bearing 35/22 filler, used without PWHT. | 260 | 470 | 15 | 180 HB | 1.7 % IACS |
Cold drawn | Use where close tolerance and higher room-temperature strength are needed; strength advantage disappears above ~600 °C. | 420 | 680 | 20 | 18 HRC | 1.7 % IACS |
What is 1.4887?
EN 1.4887 (X10NiCrSiNb35-22) is a niobium-stabilized 35Ni-22Cr heat-resistant alloy with elevated silicon, supplied mainly as static and centrifugal castings and also in wrought bar and tube. Engineers specify it for severe high-temperature oxidizing and carburizing service up to 1100 °C, with typical solution-annealed properties of 250 MPa yield, 560 MPa tensile, 35 % elongation and 170 HB. Room-temperature strength is modest, the high nickel content makes it expensive, and heavy cast sections need restraint control to avoid hot cracking during welding; lower-nickel HK-type castings are the usual step down where carburization is less severe. 1.4887 has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 68% of stainless steel grades. It melts at 1,340°C (2,444 °F). 1.4887 has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 560 MPa (81.2 ksi) — weaker than 91% of stainless steel grades. Elongation at break is 35% and the elastic modulus is 190 GPa (27.6 Msi).
What is 1.4887 used for?
- radiant tubes
- furnace fittings
- petrochemical cracking components
Advantages
- High service temperature — 1,100°C (2,012 °F), better than 96% of stainless steel grades
Limitations
- Low electrical conductivity — 1.7 % IACS, worse than 93% of stainless steel grades
- Low strength — 250 MPa (36.3 ksi), worse than 91% of stainless steel grades
- Difficult to machine — 25/100, worse than 88% of stainless steel grades
- High embodied carbon — 6 kg CO₂/kg, worse than 88% of stainless steel grades
- Poor heat conductor — 13 W/m·K (7.51 BTU/hr·ft·°F), worse than 85% of stainless steel grades
1.4887 properties
Typical room-temperature values for 1.4887-SA; bars are the position among stainless steel grades.
Physical3
1.4887 has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 68% of stainless steel grades. It melts at 1,340°C (2,444 °F).
Mechanical14
1.4887 has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 560 MPa (81.2 ksi) — weaker than 91% of stainless steel grades. Elongation at break is 35% and the elastic modulus is 190 GPa (27.6 Msi).
Thermal5
1.4887 is rated for continuous service to 1,100°C (2,012 °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 15.5 µm/m·K (8.61 µin/in·°F).
Electrical3
1.4887 conducts electricity at 1.7 % IACS, worse than 93% of stainless steel grades.
Chemical & Environmental2
Corrosion resistance is good (55/100), worse than 71% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4887 takes about 72 MJ of energy and emits 6 kg of CO₂ — more than 83% of stainless steel grades. Typical recycled content is 45%.
Manufacturability7
1.4887's machinability is poor (25/100, worse than 88% of stainless steel grades); weldability good (65/100); formability good (55/100).
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. 1.4887 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1.4887
Is 1.4887 easy to machine?
Gummy, work-hardening and abrasive from Nb carbides — use rigid setups, positive-rake carbide or ceramic inserts, low speed with heavy positive feed, flood coolant, and never dwell in the cut.
Can 1.4887 be welded?
Weld with matching Nb-bearing 35/22 filler (GTAW/SMAW), low heat input, no preheat needed on wrought; high-carbon cast sections need buttering/careful restraint control to avoid hot cracking.
Can 1.4887 be formed, bent or molded?
Wrought product cold-forms like a 310-type austenitic but with higher forces and springback; cast product is not formable — hot work 1100–1180 °C and re-solution anneal ~1100 °C with rapid cooling.
1.4887 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 |
|---|---|---|
| Chigher (0.35–0.45) in the cast GX40 variant | 0.05 – 0.15 | 0.1 |
| Siraises oxidation/carburization resistance | 1 – 2 | 1.5 |
| Mn | ≤ 2 | 1 |
| P | ≤ 0.03 | — |
| S | ≤ 0.02 | — |
| Cr | 20 – 23 | 21.5 |
| Ni | 33 – 37 | 35 |
| Nbstabilizer, boosts creep-rupture strength | 0.6 – 1.4 | 1 |
| Fe | balance | — |
What surface finishes work on 1.4887?
Grind/pickle in HNO3-HF to remove the tenacious Cr-Si scale after hot work or welding; polishes to a satin finish, no anodizing, and a self-healing chromia/silica 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 1.4887 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- X10NiCrSiNb35-22
How much does 1.4887 cost?
1.4887 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.
1.4887 — frequently asked
What is 1.4887 used for?
1.4887 is typically used for radiant tubes, furnace fittings and petrochemical cracking components. In short: 1100 °C service capability; carburization-resistant cast alloy; nb-stabilized 35/22 chemistry.
What is the yield strength of 1.4887?
1.4887 has a typical yield strength of 250 MPa (36.3 ksi) and a tensile strength of 560 MPa (81.2 ksi) — weaker than 91% of stainless steel grades. Strength varies by condition: see the 5 listed tempers.
Is 1.4887 easy to machine?
Not especially — machinability is rated poor (25/100, worse than 88% of stainless steel grades). Gummy, work-hardening and abrasive from Nb carbides — use rigid setups, positive-rake carbide or ceramic inserts, low speed with heavy positive feed, flood coolant, and never dwell in the cut.
Can 1.4887 be welded?
Yes — weldability is rated good (65/100). Weld with matching Nb-bearing 35/22 filler (GTAW/SMAW), low heat input, no preheat needed on wrought; high-carbon cast sections need buttering/careful restraint control to avoid hot cracking.
What surface finishes work on 1.4887?
Grind/pickle in HNO3-HF to remove the tenacious Cr-Si scale after hot work or welding; polishes to a satin finish, no anodizing, and a self-healing chromia/silica scale forms in service.
Can 1.4887 be formed, bent or molded?
Wrought product cold-forms like a 310-type austenitic but with higher forces and springback; cast product is not formable — hot work 1100–1180 °C and re-solution anneal ~1100 °C with rapid cooling.
What is the maximum service temperature of 1.4887?
1.4887 is rated for continuous use to about 1,100°C (2,012 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 1.4887-SA and 1.4887-CD?
SA is the default condition — standard wrought delivery condition — best ductility and toughness for formed and welded furnace parts. CD: use where close tolerance and higher room-temperature strength are needed; strength advantage disappears above ~600 °C. Yield strength is 250 MPa in SA versus 420 MPa in CD.
How much does 1.4887 cost?
1.4887 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 10095 — Heat resisting steels and nickel alloys — CEN (2018)
- EN 10295 — Heat resistant steel castings — CEN (2002)
- 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)
- Heat-resistant Fe-Ni-Cr cast tube alloy datasheets (HP/HT-Nb class) — Various foundries (2023)
- SMM nickel & heat-resistant alloy price indications — SMM (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.