Stainless Steel 1.4876-ANN (Annealed)
Heat-treated state · default condition
EN 1.4876 · UNS N08800 · ASTM B408/B409 · also Incoloy 800
Standard stocked condition for plate, sheet, bar and tube where corrosion resistance and formability matter more than creep strength.
Values for the ANN condition
Other 1.4876 tempers and conditions
1.4876 is listed in 8 conditions; see the grade overview at 1.4876.
Compare all 8 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
High-carbon, solution annealed ≥1150 °C, coarse grain | Dual-certified high-temperature version for ASME Code service above 600 °C where creep-rupture strength governs (furnace tubes, headers). | 220 | 520 | 45 | 130 HB | 1.7 % IACS |
Controlled C+N and Al+Ti, solution annealed coarse grain | Pick when the highest and most reproducible creep-rupture life in the 760–980 °C range is required (ethylene pyrolysis coils, reformer pigtails). | 230 | 530 | 45 | 135 HB | 1.7 % IACS |
ANNDefaultThis page Annealed | Standard stocked condition for plate, sheet, bar and tube where corrosion resistance and formability matter more than creep strength. | 250 | 550 | 43 | 140 HB | — |
Hot rolled / hot finished and annealed | Heavy plate and forged/hot-rolled bar supplied descaled and annealed; slightly coarser grain and marginally higher strength scatter than cold-finished stock. | 270 | 570 | 40 | 150 HB | 1.7 % IACS |
As-welded deposit | Typical properties of a full-penetration weldment used as-welded; no post-weld heat treatment is normally required. | 300 | 560 | 35 | 165 HB | 1.7 % IACS |
Stress relieved | For cold-formed or machined parts needing dimensional stability and reduced SCC risk while keeping part of the cold-work strength. | 450 | 660 | 28 | 11 HRC | 1.7 % IACS |
Cold drawn | Higher strength, closer tolerance and better chip control for machined fittings and fasteners; reduced ductility and residual stresses. | 480 | 690 | 25 | 200 HB | — |
Cold worked, 1/4 hard | Use where springback/strength is needed in thin strip or tube while retaining some formability. | 560 | 760 | 15 | 21 HRC | 1.7 % IACS |
What is 1.4876-ANN?
1.4876-ANN is 1.4876 heat treated to ANN — standard stocked condition for plate, sheet, bar and tube where corrosion resistance and formability matter more than creep strength. 1.4876-ANN has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 550 MPa (79.8 ksi) — weaker than 91% of stainless steel grades. Elongation at break is 43% and the elastic modulus is 196 GPa (28.4 Msi). 1.4876-ANN has a density of 7.94 g/cm³ (0.287 lb/in³), heavier than 78% of stainless steel grades. It melts at 1,357°C (2,475 °F).
Advantages
- Forms and bends easily — 72/100, better than 84% of stainless steel grades
- High service temperature — 850°C (1,562 °F), better than 80% of stainless steel grades
- Readily welded — 80/100, better than 80% of stainless steel grades
Limitations
- Poor heat conductor — 11.5 W/m·K (6.64 BTU/hr·ft·°F), worse than 97% of stainless steel grades
- High embodied carbon — 6.8 kg CO₂/kg, worse than 95% of stainless steel grades
- Low strength — 250 MPa (36.3 ksi), worse than 91% of stainless steel grades
- Low electrical conductivity — 1.7 % IACS, worse than 88% of stainless steel grades
1.4876-ANN properties
Typical room-temperature values for 1.4876-ANN; 15 are specific to this condition. Other listed values are 1.4876 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
1.4876-ANN has a density of 7.94 g/cm³ (0.287 lb/in³), heavier than 78% of stainless steel grades. It melts at 1,357°C (2,475 °F).
Mechanical15
1.4876-ANN has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 550 MPa (79.8 ksi) — weaker than 91% of stainless steel grades. Elongation at break is 43% and the elastic modulus is 196 GPa (28.4 Msi).
Thermal5
1.4876-ANN is rated for continuous service to 850°C (1,562 °F). It conducts heat at 11.5 W/m·K (6.64 BTU/hr·ft·°F), worse than 97% of stainless steel grades. Thermal expansion is 14.4 µm/m·K (8 µin/in·°F).
Electrical3
1.4876-ANN conducts electricity at 1.7 % IACS, worse than 88% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (68/100), better than 63% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4876-ANN takes about 100 MJ of energy and emits 6.8 kg of CO₂ — more than 98% of stainless steel grades. Typical recycled content is 35%.
Manufacturability7
1.4876-ANN's machinability is poor (30/100, worse than 70% of stainless steel grades); weldability very good (80/100); formability very good (72/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1.4876-ANN
Is 1.4876 easy to machine?
Machine like a tough austenitic: rigid setup, positive-rake sharp carbide, 20–40 m/min, heavy constant feed to cut under the work-hardened layer, and copious sulphurised/emulsion coolant.
Can 1.4876 be welded?
Readily welded by GTAW/GMAW/SMAW with ERNiCr-3 (Alloy 82) or ENiCrFe-3; keep heat input and interpass low, no preheat or PWHT needed, avoid sulphur-bearing contaminants on hot surfaces.
Can 1.4876 be formed, bent or molded?
Good cold formability (deep drawing, spinning, tube bending) but ~50 % higher forces and springback than 304; hot work at 900–1200 °C and anneal at ~980 °C (or ≥1150 °C for 800H/HT grain size).
What surface finishes work on 1.4876?
Pickle in HNO₃–HF or grit-blast plus passivation to remove Cr/Al-rich scale; not anodizable, mechanical polish or electropolish for hygienic and high-vacuum surfaces.
1.4876 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 |
|---|---|---|
| Ni | 30 – 35 | 32.5 |
| Cr | 19 – 23 | 21 |
| CEN 10095 X10NiCrAlTi32-21; ASTM B409 allows 0.10 max | 0.05 – 0.1 | 0.08 |
| Mn | ≤ 1.5 | 0.8 |
| Si | ≤ 1 | 0.5 |
| Al | 0.15 – 0.6 | 0.4 |
| Ti | 0.15 – 0.6 | 0.4 |
| Cu | ≤ 0.75 | 0.3 |
| S | ≤ 0.02 | 0.01 |
| PEN limit | ≤ 0.03 | 0.02 |
| Febalance, 39.5 % min per ASTM B409 | ≥ 39.5 (balance) | — |
1.4876-ANN — frequently asked
What is 1.4876-ANN used for?
1.4876-ANN is typically used for heat exchanger tubing, furnace muffles, chemical processing equipment and petrochemical reformer tubes. In short: baseline Alloy 800 grade; carburization-resistant to 850 °C; readily weldable heat-resistant alloy.
What is the yield strength of 1.4876-ANN?
1.4876-ANN has a typical yield strength of 250 MPa (36.3 ksi) and a tensile strength of 550 MPa (79.8 ksi) — weaker than 91% of stainless steel grades. Strength varies by condition: see the 8 listed tempers.
Is 1.4876-ANN easy to machine?
Not especially — machinability is rated poor (30/100, worse than 70% of stainless steel grades). Machine like a tough austenitic: rigid setup, positive-rake sharp carbide, 20–40 m/min, heavy constant feed to cut under the work-hardened layer, and copious sulphurised/emulsion coolant.
Can 1.4876-ANN be welded?
Yes — weldability is rated very good (80/100). Readily welded by GTAW/GMAW/SMAW with ERNiCr-3 (Alloy 82) or ENiCrFe-3; keep heat input and interpass low, no preheat or PWHT needed, avoid sulphur-bearing contaminants on hot surfaces.
What surface finishes work on 1.4876-ANN?
Pickle in HNO₃–HF or grit-blast plus passivation to remove Cr/Al-rich scale; not anodizable, mechanical polish or electropolish for hygienic and high-vacuum surfaces.
Can 1.4876-ANN be formed, bent or molded?
Good cold formability (deep drawing, spinning, tube bending) but ~50 % higher forces and springback than 304; hot work at 900–1200 °C and anneal at ~980 °C (or ≥1150 °C for 800H/HT grain size).
What is the maximum service temperature of 1.4876-ANN?
1.4876-ANN is rated for continuous use to about 850°C (1,562 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 1.4876-ANN and 1.4876-CD?
ANN is the default condition — standard stocked condition for plate, sheet, bar and tube where corrosion resistance and formability matter more than creep strength. CD: higher strength, closer tolerance and better chip control for machined fittings and fasteners; reduced ductility and residual stresses. Yield strength is 250 MPa in ANN versus 480 MPa in CD.
Sources
- ASTM B409 / B408 — UNS N08800 Plate, Sheet, Strip and Bar — ASTM International (2023)
- EN 10095 — Heat resisting steels and nickel alloys (X10NiCrAlTi32-21, 1.4876) — CEN (2018)
- INCOLOY alloy 800 technical bulletin — Special Metals Corporation (2004)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- ASME BPVC Section II Part D — allowable stresses for N08800/N08810/N08811 — ASME (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.