Stainless Steel 1.4823-AC (Spheroidize annealed)
Heat-treated state · default condition
EN 1.4823 · UNS J93403 · ASTM A297 Grade HD
Default supply condition for furnace hardware — heat-resistant castings are normally used as-cast because service temperature exceeds any heat-treatment benefit.
Values for the AC condition
Other 1.4823 tempers and conditions
1.4823 is listed in 3 conditions; see the grade overview at 1.4823.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Solution annealed | Occasionally specified to homogenise the carbide network and restore some ductility before heavy machining or on castings that saw low-temperature ordering embrittlement. | 265 | 490 | 9 | 190 HB | 1.9 % IACS |
Stress relieved | Pick when thick, complex castings must be machined to tight tolerance or welded, to relieve solidification stresses without changing the carbide structure. | 275 | 505 | 7 | 195 HB | 1.9 % IACS |
ACDefaultThis page Spheroidize annealed | Default supply condition for furnace hardware — heat-resistant castings are normally used as-cast because service temperature exceeds any heat-treatment benefit. | 285 | 520 | 6 | 200 HB | 1.9 % IACS |
What is 1.4823-AC?
1.4823-AC is 1.4823 heat treated to AC — default supply condition for furnace hardware — heat-resistant castings are normally used as-cast because service temperature exceeds any heat-treatment benefit. 1.4823-AC has a yield strength of 285 MPa (41.3 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 74% of stainless steel grades. Elongation at break is 6% and the elastic modulus is 195 GPa (28.3 Msi). 1.4823-AC has a density of 7.6 g/cm³ (0.275 lb/in³), lighter than 98% of stainless steel grades. It melts at 1,370°C (2,498 °F).
Advantages
- High service temperature — 1,050°C (1,922 °F), better than 91% of stainless steel grades
- Low embodied carbon — 3.6 kg CO₂/kg, better than 83% of stainless steel grades
Limitations
- Limited ductility — 6%, worse than 99% of stainless steel grades
- Limited formability — 5/100, worse than 99% of stainless steel grades
- Hard to polish — 40/100, worse than 99% of stainless steel grades
- Low fracture toughness — 35 MPa·√m (31.9 ksi·√in), worse than 98% of stainless steel grades
- Difficult to machine — 22/100, worse than 95% of stainless steel grades
1.4823-AC properties
Typical room-temperature values for 1.4823-AC; 23 are specific to this condition. Other listed values are 1.4823 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
1.4823-AC has a density of 7.6 g/cm³ (0.275 lb/in³), lighter than 98% of stainless steel grades. It melts at 1,370°C (2,498 °F).
Mechanical16
1.4823-AC has a yield strength of 285 MPa (41.3 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 74% of stainless steel grades. Elongation at break is 6% and the elastic modulus is 195 GPa (28.3 Msi).
Thermal6
1.4823-AC is rated for continuous service to 1,050°C (1,922 °F). It conducts heat at 15.5 W/m·K (8.96 BTU/hr·ft·°F), better than 53% of stainless steel grades. Thermal expansion is 11.5 µm/m·K (6.39 µin/in·°F).
Electrical3
1.4823-AC conducts electricity at 1.9 % IACS, worse than 84% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is fair (52/100), worse than 76% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4823-AC takes about 50 MJ of energy and emits 3.6 kg of CO₂ — less than 80% of stainless steel grades. Typical recycled content is 75%.
Manufacturability6
1.4823-AC's machinability is poor (22/100, worse than 95% of stainless steel grades); weldability poor (25/100); 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 1.4823-AC
Is 1.4823 easy to machine?
Machine with rigid setups, negative-rake carbide or ceramic inserts, low speed and heavy feed; the interdendritic carbide network is abrasive and work-hardens, so grinding is often preferred for finish surfaces.
Can 1.4823 be welded?
Treat as repair welding only: preheat 200–300 °C, use matching high-Cr or 25-20 (ER310) filler, minimise heat input and slow-cool to avoid cracking; expect reduced ductility in the HAZ.
Can 1.4823 be formed, bent or molded?
Supplied exclusively as sand, shell or investment castings — not cold formable; design generous fillets, uniform wall thickness and adequate risering to avoid hot tears in the high-carbon alloy.
What surface finishes work on 1.4823?
Shot blast or pickle to remove casting scale; surfaces develop a tenacious protective Cr-rich oxide in service, so paint or plating is unnecessary and generally not applied.
1.4823 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 |
|---|---|---|
| Chigh carbon gives the carbide network and creep strength | 0.3 – 0.5 | 0.4 |
| Siboosts scaling resistance; some standards allow up to 2.5 % | 0.5 – 2 | 1.5 |
| Mn | ≤ 1 | 0.7 |
| Pimpurity limit | ≤ 0.04 | — |
| Simpurity limit | ≤ 0.03 | — |
| Crprimary oxidation/sulphidation resistance | 25 – 28 | 27 |
| Nipartial austenite stabiliser, keeps cost low | 3.5 – 5.5 | 4.5 |
| Fe | balance | — |
1.4823-AC — frequently asked
What is 1.4823-AC used for?
1.4823-AC is typically used for furnace grates, heat-treatment fixtures, kiln components and exhaust and combustion system parts. In short: cast heat-resistant to 1050 °C; high-Cr scaling resistance; castings only, low ductility.
What is the yield strength of 1.4823-AC?
1.4823-AC has a typical yield strength of 285 MPa (41.3 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 74% of stainless steel grades. Strength varies by condition: see the 3 listed tempers.
Is 1.4823-AC easy to machine?
Not especially — machinability is rated poor (22/100, worse than 95% of stainless steel grades). Machine with rigid setups, negative-rake carbide or ceramic inserts, low speed and heavy feed; the interdendritic carbide network is abrasive and work-hardens, so grinding is often preferred for finish surfaces.
Can 1.4823-AC be welded?
Not readily — weldability is rated poor (25/100). Treat as repair welding only: preheat 200–300 °C, use matching high-Cr or 25-20 (ER310) filler, minimise heat input and slow-cool to avoid cracking; expect reduced ductility in the HAZ.
What surface finishes work on 1.4823-AC?
Shot blast or pickle to remove casting scale; surfaces develop a tenacious protective Cr-rich oxide in service, so paint or plating is unnecessary and generally not applied.
Can 1.4823-AC be formed, bent or molded?
Supplied exclusively as sand, shell or investment castings — not cold formable; design generous fillets, uniform wall thickness and adequate risering to avoid hot tears in the high-carbon alloy.
What is the maximum service temperature of 1.4823-AC?
1.4823-AC 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 1.4823-AC and 1.4823-A?
AC is the default condition — default supply condition for furnace hardware — heat-resistant castings are normally used as-cast because service temperature exceeds any heat-treatment benefit. A: occasionally specified to homogenise the carbide network and restore some ductility before heavy machining or on castings that saw low-temperature ordering embrittlement. Yield strength is 285 MPa in AC versus 265 MPa in A.
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 — ASTM International (2019)
- GB/T 8492 — Heat-resistant steel and alloy castings for general applications — SAC (2014)
- 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 Corrosion) — 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.