Stainless Steel 1.4864-ANN (Annealed)
Heat-treated state · default condition
EN 1.4864
Standard stocked condition for plate, sheet, bar and tube used in furnace hardware; maximum ductility and freedom from residual carbide networks.
Values for the ANN condition
Other 1.4864 tempers and conditions
1.4864 is listed in 4 conditions; see the grade overview at 1.4864.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Hot rolled | Heavy plate and hot-finished bar for welded furnace retorts and grates where surface finish is unimportant. | 245 | 570 | 42 | 155 HB | 1.7 % IACS |
ANNDefaultThis page Annealed | Standard stocked condition for plate, sheet, bar and tube used in furnace hardware; maximum ductility and freedom from residual carbide networks. | 255 | 585 | 43 | 150 HB | 1.7 % IACS |
Cold drawn | Choose for close-tolerance bar, bolting and fixture pins where higher room-temperature strength and better surface finish are needed. | 450 | 700 | 28 | 14 HRC | 1.7 % IACS |
Cold Worked, 1/4 Hard | Light temper strip and wire for springy furnace clips and mesh; strength reverts to annealed values after the first high-temperature exposure. | 520 | 760 | 20 | 20 HRC | 1.7 % IACS |
What is 1.4864-ANN?
1.4864-ANN is 1.4864 heat treated to ANN — standard stocked condition for plate, sheet, bar and tube used in furnace hardware; maximum ductility and freedom from residual carbide networks. 1.4864-ANN has a yield strength of 255 MPa (37 ksi) and a tensile strength of 585 MPa (84.8 ksi) — weaker than 87% of stainless steel grades. Elongation at break is 43% and the elastic modulus is 196 GPa (28.4 Msi). 1.4864-ANN has a density of 7.94 g/cm³ (0.287 lb/in³), heavier than 78% of stainless steel grades. It melts at 1,360°C (2,480 °F).
Advantages
- High service temperature — 1,050°C (1,922 °F), better than 91% of stainless steel grades
Limitations
- Low electrical conductivity — 1.7 % IACS, worse than 93% of stainless steel grades
- High embodied carbon — 6.5 kg CO₂/kg, worse than 93% of stainless steel grades
- Poor heat conductor — 12.6 W/m·K (7.28 BTU/hr·ft·°F), worse than 88% of stainless steel grades
- Low strength — 255 MPa (37 ksi), worse than 87% of stainless steel grades
1.4864-ANN properties
Typical room-temperature values for 1.4864-ANN; 23 are specific to this condition. Other listed values are 1.4864 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
1.4864-ANN has a density of 7.94 g/cm³ (0.287 lb/in³), heavier than 78% of stainless steel grades. It melts at 1,360°C (2,480 °F).
Mechanical16
1.4864-ANN has a yield strength of 255 MPa (37 ksi) and a tensile strength of 585 MPa (84.8 ksi) — weaker than 87% of stainless steel grades. Elongation at break is 43% and the elastic modulus is 196 GPa (28.4 Msi).
Thermal6
1.4864-ANN is rated for continuous service to 1,050°C (1,922 °F). It conducts heat at 12.6 W/m·K (7.28 BTU/hr·ft·°F), worse than 88% of stainless steel grades. Thermal expansion is 14.9 µm/m·K (8.28 µin/in·°F).
Electrical3
1.4864-ANN conducts electricity at 1.7 % IACS, worse than 93% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (58/100), worse than 62% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4864-ANN takes about 85 MJ of energy and emits 6.5 kg of CO₂ — more than 92% of stainless steel grades. Typical recycled content is 50%.
Manufacturability7
1.4864-ANN's machinability is poor (28/100, worse than 79% of stainless steel grades); weldability very good (70/100); formability good (60/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1.4864-ANN
Is 1.4864 easy to machine?
Rigid setups, positive-rake carbide, heavy constant feed and flood coolant; the high-Si austenite work-hardens fast so avoid dwelling and rubbing.
Can 1.4864 be welded?
GTAW/GMAW/SMAW with matching 330 filler or ERNiCr-3/ENiCrFe-3; no preheat needed, keep interpass below ~150 °C and heat input low to limit hot-cracking from the high Si.
Can 1.4864 be formed, bent or molded?
Cold forms like a stiff 310S — allow extra springback and interstage anneals at 1050–1100 °C; hot work between 1150 and 950 °C then rapid cool.
What surface finishes work on 1.4864?
Pickle and passivate after hot work or welding; for service, a first firing in clean air builds the protective Cr-Si oxide — avoid sulphur-bearing marking paints and lubricants.
1.4864 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 |
|---|---|---|
| CEN 10095; N08330 allows 0.08 max in some tube specs | 0.05 – 0.15 | 0.1 |
| Sikey for scale adherence | 1 – 2 | 1.5 |
| Mn | ≤ 2 | 1 |
| P | ≤ 0.05 | — |
| S | ≤ 0.02 | — |
| CrN08330 runs 17–20 Cr | 15 – 17 | 16 |
| Ni | 33 – 37 | 35 |
| Fe | balance | — |
1.4864-ANN — frequently asked
What is 1.4864-ANN used for?
1.4864-ANN is typically used for furnace parts, heat-treatment fixtures, carburizing baskets and annealing boxes. In short: scaling resistant to 1050 °C; high-silicon 330-type grade; built for thermal cycling.
What is the yield strength of 1.4864-ANN?
1.4864-ANN has a typical yield strength of 255 MPa (37 ksi) and a tensile strength of 585 MPa (84.8 ksi) — weaker than 87% of stainless steel grades. Strength varies by condition: see the 4 listed tempers.
Is 1.4864-ANN easy to machine?
Not especially — machinability is rated poor (28/100, worse than 79% of stainless steel grades). Rigid setups, positive-rake carbide, heavy constant feed and flood coolant; the high-Si austenite work-hardens fast so avoid dwelling and rubbing.
Can 1.4864-ANN be welded?
Yes — weldability is rated very good (70/100). GTAW/GMAW/SMAW with matching 330 filler or ERNiCr-3/ENiCrFe-3; no preheat needed, keep interpass below ~150 °C and heat input low to limit hot-cracking from the high Si.
What surface finishes work on 1.4864-ANN?
Pickle and passivate after hot work or welding; for service, a first firing in clean air builds the protective Cr-Si oxide — avoid sulphur-bearing marking paints and lubricants.
Can 1.4864-ANN be formed, bent or molded?
Cold forms like a stiff 310S — allow extra springback and interstage anneals at 1050–1100 °C; hot work between 1150 and 950 °C then rapid cool.
What is the maximum service temperature of 1.4864-ANN?
1.4864-ANN 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 1.4864-ANN and 1.4864-CD?
ANN is the default condition — standard stocked condition for plate, sheet, bar and tube used in furnace hardware; maximum ductility and freedom from residual carbide networks. CD: choose for close-tolerance bar, bolting and fixture pins where higher room-temperature strength and better surface finish are needed. Yield strength is 255 MPa in ANN versus 450 MPa in CD.
Sources
- EN 10095 — Heat resisting steels and nickel alloys — CEN (2018)
- ASTM B536 / B511 — UNS N08330 plate, sheet, strip and bar — ASTM International (2019)
- Alloy 330 (UNS N08330) heat-resistant alloy datasheet — Rolled Alloys / Sandvik (2022)
- 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)
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.