Stainless Steel 1.4865-AC (Spheroidize annealed)
Heat-treated state · default condition
EN 1.4865
Standard supply condition for furnace fixtures, trays and radiant-tube parts; no heat treatment is specified in EN 10295 for this grade.
Values for the AC condition
Other 1.4865 tempers and conditions
1.4865 is listed in 3 conditions; see the grade overview at 1.4865.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
As-cast plus stress-relief anneal | Pick for large or heavily welded/machined castings where casting and welding residual stresses would cause distortion or cracking on first heat-up. | 230 | 460 | 11 | 170 HB | 1.7 % IACS |
ACDefaultThis page Spheroidize annealed | Standard supply condition for furnace fixtures, trays and radiant-tube parts; no heat treatment is specified in EN 10295 for this grade. | 240 | 470 | 10 | 175 HB | 1.7 % IACS |
Service-exposed / thermally aged | Reference condition for design of parts already in long-term high-temperature service — secondary carbide precipitation raises hardness and strength but collapses room-temperature ductility and impact toughness. | 290 | 480 | 3 | 200 HB | 1.8 % IACS |
What is 1.4865-AC?
1.4865-AC is 1.4865 heat treated to AC — standard supply condition for furnace fixtures, trays and radiant-tube parts; no heat treatment is specified in EN 10295 for this grade. 1.4865-AC has a yield strength of 240 MPa (34.8 ksi) and a tensile strength of 470 MPa (68.2 ksi) — weaker than 96% of stainless steel grades. Elongation at break is 10% and the elastic modulus is 160 GPa (23.2 Msi). 1.4865-AC has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 68% of stainless steel grades. It melts at 1,310°C (2,390 °F).
Advantages
- High service temperature — 1,100°C (2,012 °F), better than 96% of stainless steel grades
Limitations
- Low stiffness — 160 GPa (23.2 Msi), worse than 100% of stainless steel grades
- Limited formability — 5/100, worse than 99% of stainless steel grades
- Limited ductility — 10%, worse than 98% of stainless steel grades
- Low strength — 240 MPa (34.8 ksi), worse than 96% of stainless steel grades
- Hard to polish — 45/100, worse than 96% of stainless steel grades
1.4865-AC properties
Typical room-temperature values for 1.4865-AC; 21 are specific to this condition. Other listed values are 1.4865 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
1.4865-AC has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 68% of stainless steel grades. It melts at 1,310°C (2,390 °F).
Mechanical15
1.4865-AC has a yield strength of 240 MPa (34.8 ksi) and a tensile strength of 470 MPa (68.2 ksi) — weaker than 96% of stainless steel grades. Elongation at break is 10% and the elastic modulus is 160 GPa (23.2 Msi).
Thermal6
1.4865-AC is rated for continuous service to 1,100°C (2,012 °F). It conducts heat at 13.5 W/m·K (7.8 BTU/hr·ft·°F), worse than 83% of stainless steel grades. Thermal expansion is 15.5 µm/m·K (8.61 µin/in·°F).
Electrical3
1.4865-AC 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 1.4865-AC takes about 100 MJ of energy and emits 7 kg of CO₂ — more than 98% of stainless steel grades. Typical recycled content is 65%.
Manufacturability8
1.4865-AC's machinability is poor (22/100, worse than 95% of stainless steel grades); weldability fair (40/100); formability not recommended (5/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1.4865-AC
Is 1.4865 easy to machine?
Difficult: use rigid setups, sharp positive-rake carbide (or ceramic for finishing), low speed and heavy positive feed to cut under the work-hardened skin, plenty of coolant; avoid dwelling and grind rather than turn on aged/embrittled parts.
Can 1.4865 be welded?
Weldable with matching 38Ni-19Cr or Ni-base (ERNiCr-3 / 82) filler; preheat 150–250 °C, low heat input, hammer-peen and post-weld stress relieve — aged material must be locally solution-annealed or ground back before repair to avoid cracking.
Can 1.4865 be formed, bent or molded?
Cast only — sand, investment and centrifugal casting all work well; provide generous fillets and directional feeding because solidification shrinkage and hot-tear sensitivity are high with the coarse austenitic grain.
What surface finishes work on 1.4865?
Normally supplied shot-blasted and as-cast; machined sealing faces can be ground or lapped, and a self-forming Cr₂O₃/SiO₂ scale is the working surface — no coating or plating is needed or recommended for furnace service.
1.4865 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 |
|---|---|---|
| C | 0.3 – 0.5 | 0.4 |
| Siraises scaling resistance | 1 – 2.5 | 1.6 |
| Mn | ≤ 2 | 1 |
| Pimpurity | ≤ 0.04 | — |
| Simpurity | ≤ 0.03 | — |
| Cr | 18 – 21 | 19 |
| Ni | 36 – 39 | 37.5 |
| Moresidual, restricted by most specs | ≤ 0.5 | — |
| Fe | balance | — |
1.4865-AC — frequently asked
What is 1.4865-AC used for?
1.4865-AC is typically used for furnace fixtures and trays, kiln rollers and radiant tube supports. In short: high-nickel carburization resistance; 1100 °C cast service; cast forms only.
What is the yield strength of 1.4865-AC?
1.4865-AC has a typical yield strength of 240 MPa (34.8 ksi) and a tensile strength of 470 MPa (68.2 ksi) — weaker than 96% of stainless steel grades. Strength varies by condition: see the 3 listed tempers.
Is 1.4865-AC easy to machine?
Not especially — machinability is rated poor (22/100, worse than 95% of stainless steel grades). Difficult: use rigid setups, sharp positive-rake carbide (or ceramic for finishing), low speed and heavy positive feed to cut under the work-hardened skin, plenty of coolant; avoid dwelling and grind rather than turn on aged/embrittled parts.
Can 1.4865-AC be welded?
With care — weldability is rated fair (40/100). Weldable with matching 38Ni-19Cr or Ni-base (ERNiCr-3 / 82) filler; preheat 150–250 °C, low heat input, hammer-peen and post-weld stress relieve — aged material must be locally solution-annealed or ground back before repair to avoid cracking.
What surface finishes work on 1.4865-AC?
Normally supplied shot-blasted and as-cast; machined sealing faces can be ground or lapped, and a self-forming Cr₂O₃/SiO₂ scale is the working surface — no coating or plating is needed or recommended for furnace service.
Can 1.4865-AC be formed, bent or molded?
Cast only — sand, investment and centrifugal casting all work well; provide generous fillets and directional feeding because solidification shrinkage and hot-tear sensitivity are high with the coarse austenitic grain.
What is the maximum service temperature of 1.4865-AC?
1.4865-AC 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 1.4865-AC and 1.4865 Aged?
AC is the default condition — standard supply condition for furnace fixtures, trays and radiant-tube parts; no heat treatment is specified in EN 10295 for this grade. Aged: reference condition for design of parts already in long-term high-temperature service — secondary carbide precipitation raises hardness and strength but collapses room-temperature ductility and impact toughness. Yield strength is 240 MPa in AC versus 290 MPa in Aged.
Sources
- EN 10295 — Heat resistant steel castings — CEN (2002)
- ASTM A297/A297M — Steel Castings, Iron-Chromium and Iron-Chromium-Nickel, Heat Resistant, for General Application (Grade HT) — ASTM (2020)
- 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 (High-temperature carburization and oxidation) — 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.