Nickel Alloy Incoloy 800
UNS N08800 · EN 1.4876, X10NiCrAlTi32-21 · JIS NCF800
Incoloy 800 (N08800, 1.4876, X10NiCrAlTi32-21, NCF800) is a solid-solution iron-nickel-chromium alloy with small aluminium and titanium additions, the base grade of the 800 family.
Reference datasheet — Incoloy 800 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 ANN condition
Incoloy 800 tempers and conditions
Incoloy 800 is supplied in 6 conditions, soft to hard. ANN is the default FabDigit quotes; the values on this page are for it.
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Solution Annealed | Pick when creep and stress-rupture life above 600 °C matter (equivalent practice to 800H heat treatment). | 215 | 550 | 48 | 125 HB | 1.7 % IACS |
ANNDefault Annealed | Standard stocked condition for fabrication, forming and welding; best ductility and corrosion resistance below ~600 °C. | 250 | 600 | 45 | 140 HB | — |
Cold Drawn + Annealed | Standard heat-exchanger and boiler tubing condition: close tolerances, bright oxide-free surface, fully soft. | 260 | 610 | 43 | 145 HB | 1.7 % IACS |
Cold Drawn + Stress Relieved | For machined or bent cold-drawn parts where residual stress and distortion must be reduced while keeping most of the cold-work strength. | 430 | 670 | 30 | 185 HB | 1.7 % IACS |
Cold drawn | Use where higher room-temperature strength, straightness and better chip control are needed for machined parts and fasteners. | 500 | 720 | 25 | 200 HB | — |
Cold Worked, Hard | Select for springs, thermocouple sheathing and clips needing maximum room-temperature strength; not for service above ~500 °C. | 680 | 850 | 12 | 24 HRC | 1.7 % IACS |
Supply forms, finishes and certifications
Ways Incoloy 800 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
WLD | As-Welded | Supply form |
HRA | Hot-Rolled Annealed | Surface finish |
What is Incoloy 800?
Incoloy 800 (N08800, 1.4876, X10NiCrAlTi32-21, NCF800) is a solid-solution iron-nickel-chromium alloy with small aluminium and titanium additions, the base grade of the 800 family. It is specified for oxidation and carburization resistance to about 815 °C at lower cost than nickel-base alloys, in tube, pipe, plate, sheet and bar. Annealed strength is roughly 250 MPa yield, 600 MPa tensile, 45% elongation and 140 HB, with good weldability (score 78) and formability (score 80). Carbon and grain size are not controlled for creep, so use 800H or 800HT where code stress-rupture credit is needed above 600 °C. Incoloy 800 has a density of 7.94 g/cm³ (0.287 lb/in³), lighter than 88% of nickel alloy grades. It melts at 1,357°C (2,475 °F). Incoloy 800 has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 600 MPa (87 ksi) — weaker than 87% of nickel alloy grades. Elongation at break is 45% and the elastic modulus is 196 GPa (28.4 Msi).
What is Incoloy 800 used for?
- furnace muffles/baskets
- heat exchanger tubing
- petrochemical piping
- radiant tubes
Advantages
- Low embodied carbon — 7 kg CO₂/kg, better than 98% of nickel alloy grades
- Forms and bends easily — 80/100, better than 91% of nickel alloy grades
- Easy to machine — 30/100, better than 90% of nickel alloy grades
- High electrical conductivity — 1.7 % IACS, better than 80% of nickel alloy grades
Limitations
- Low strength — 250 MPa (36.3 ksi), worse than 87% of nickel alloy grades
Incoloy 800 properties
Typical room-temperature values for Incoloy 800-ANN; bars are the position among nickel alloy grades.
Physical3
Incoloy 800 has a density of 7.94 g/cm³ (0.287 lb/in³), lighter than 88% of nickel alloy grades. It melts at 1,357°C (2,475 °F).
Mechanical14
Incoloy 800 has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 600 MPa (87 ksi) — weaker than 87% of nickel alloy grades. Elongation at break is 45% and the elastic modulus is 196 GPa (28.4 Msi).
Thermal6
Incoloy 800 is rated for continuous service to 815°C (1,499 °F). It conducts heat at 11.5 W/m·K (6.64 BTU/hr·ft·°F), better than 57% of nickel alloy grades. Thermal expansion is 14.4 µm/m·K (8 µin/in·°F).
Electrical3
Incoloy 800 conducts electricity at 1.7 % IACS, better than 80% of nickel alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (72/100), worse than 71% of nickel alloy grades.
Sustainability4
Producing a kilogram of Incoloy 800 takes about 95 MJ of energy and emits 7 kg of CO₂ — less than 97% of nickel alloy grades. Typical recycled content is 40%.
Manufacturability8
Incoloy 800's machinability is poor (30/100, better than 90% of nickel alloy grades); weldability very good (78/100); formability very good (80/100).
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 nickel alloy family
Yield strength against density for every nickel alloy grade FabDigit runs. Incoloy 800 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with Incoloy 800
Is Incoloy 800 easy to machine?
Machine like a tough austenitic alloy: rigid setup, positive-rake sharp carbide, 20–40 m/min, heavy constant feed to cut under the work-hardened layer, flood emulsion or sulfochlorinated oil.
Can Incoloy 800 be welded?
Readily welded by GTAW/GMAW/SMAW with ERNiCr-3 (82) or ENiCrFe-2/3 filler; keep interpass below ~150 °C, low heat input, no preheat and no PWHT normally required.
Can Incoloy 800 be formed, bent or molded?
Excellent cold formability but rapid work hardening — allow ~50% more press force than 304 and interstage anneal at 980 °C; hot work 900–1200 °C, finish above 900 °C.
Incoloy 800 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 |
|---|---|---|
| Niper ASTM B409 / UNS N08800 | 30 – 35 | 32.5 |
| Cr | 19 – 23 | 21 |
| C | ≤ 0.1 | 0.05 |
| Mn | ≤ 1.5 | 0.8 |
| Si | ≤ 1 | 0.5 |
| S | ≤ 0.02 | 0.01 |
| Cu | ≤ 0.75 | 0.3 |
| Al | 0.15 – 0.6 | 0.38 |
| Ti | 0.15 – 0.6 | 0.38 |
| Fe39.5 % min, remainder | ≥ 39.5 (balance) |
What surface finishes work on Incoloy 800?
Pickle in HNO3-HF or grit-blast then passivate to remove the tenacious Cr/Ti oxide before service; can be electropolished or mechanically polished, but not anodized.
Surface treatments FabDigit runs on nickel alloy 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).
Plating
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Nickel Alloy Incoloy 800 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- N08800
- EN / DIN / Werkstoff-Nr.
- 1.4876X10NiCrAlTi32-21
- JIS
- NCF800
- Other
- B407/B408/B409Incoloy800
How much does Incoloy 800 cost?
Incoloy 800 is a high-cost nickel alloy ($$$$), 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.
Incoloy 800 — frequently asked
What is Incoloy 800 used for?
Incoloy 800 is typically used for furnace muffles/baskets, heat exchanger tubing, petrochemical piping and radiant tubes. In short: cost-effective 800-family base; carburization-resistant Fe-Ni-Cr; no creep grain-size control.
What is the yield strength of Incoloy 800?
Incoloy 800 has a typical yield strength of 250 MPa (36.3 ksi) and a tensile strength of 600 MPa (87 ksi) — weaker than 87% of nickel alloy grades. Strength varies by condition: see the 6 listed tempers.
Is Incoloy 800 easy to machine?
Not especially — machinability is rated poor (30/100, better than 90% of nickel alloy grades). Machine like a tough austenitic alloy: rigid setup, positive-rake sharp carbide, 20–40 m/min, heavy constant feed to cut under the work-hardened layer, flood emulsion or sulfochlorinated oil.
Can Incoloy 800 be welded?
Yes — weldability is rated very good (78/100). Readily welded by GTAW/GMAW/SMAW with ERNiCr-3 (82) or ENiCrFe-2/3 filler; keep interpass below ~150 °C, low heat input, no preheat and no PWHT normally required.
What surface finishes work on Incoloy 800?
Pickle in HNO3-HF or grit-blast then passivate to remove the tenacious Cr/Ti oxide before service; can be electropolished or mechanically polished, but not anodized.
Can Incoloy 800 be formed, bent or molded?
Excellent cold formability but rapid work hardening — allow ~50% more press force than 304 and interstage anneal at 980 °C; hot work 900–1200 °C, finish above 900 °C.
What is the maximum service temperature of Incoloy 800?
Incoloy 800 is rated for continuous use to about 815°C (1,499 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between Incoloy 800-ANN and Incoloy 800 CW-H?
ANN is the default condition — standard stocked condition for fabrication, forming and welding; best ductility and corrosion resistance below ~600 °C. CW-H: select for springs, thermocouple sheathing and clips needing maximum room-temperature strength; not for service above ~500 °C. Yield strength is 250 MPa in ANN versus 680 MPa in CW-H.
How much does Incoloy 800 cost?
Incoloy 800 is a high-cost nickel alloy ($$$$), 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
- ASTM B409 / B408 / B407 (Alloy 800 plate, bar, tube) — ASTM International (2021)
- EN 10095 / DIN 17460 — X10NiCrAlTi32-21 (1.4876) — CEN (2018)
- INCOLOY alloys 800, 800H, 800HT technical bulletin — Special Metals Corporation (2004)
- ASM Handbook Vol.2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials — ASM International (1990)
- GB/T 15007 (NS1101) — SAC (2017)
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.