Stainless Steel 1.4724 +A (Annealed)
Heat-treated state · default condition
EN 1.4724
Standard supply condition for plate, bar and forgings destined for high-temperature service.
Values for the +A condition
Other 1.4724 tempers and conditions
1.4724 is listed in 3 conditions; see the grade overview at 1.4724.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Stress relieved | Post-fabrication treatment to restore ductility and relieve welding/forming stresses before service. | 290 | 545 | 21 | 172 HB | 2.5 % IACS |
+ADefaultThis page Annealed | Standard supply condition for plate, bar and forgings destined for high-temperature service. | 300 | 560 | 20 | 180 HB | 2.5 % IACS |
Cold drawn | Cold drawn condition for close tolerances and higher room-temperature strength; strength is lost after high-temperature exposure. | 550 | 700 | 10 | 220 HB | 2.5 % IACS |
What is 1.4724 +A?
1.4724 +A is 1.4724 heat treated to +A — standard supply condition for plate, bar and forgings destined for high-temperature service. 1.4724 +A has a yield strength of 300 MPa (43.5 ksi) and a tensile strength of 560 MPa (81.2 ksi) — weaker than 68% of stainless steel grades. Elongation at break is 20% and the elastic modulus is 220 GPa (31.9 Msi). 1.4724 +A has a density of 7.6 g/cm³ (0.275 lb/in³), lighter than 98% of stainless steel grades. It melts at 1,450°C (2,642 °F).
Advantages
- Low embodied carbon — 3.2 kg CO₂/kg, better than 95% of stainless steel grades
- Easy to machine — 45/100, better than 84% of stainless steel grades
- High service temperature — 850°C (1,562 °F), better than 80% of stainless steel grades
- Conducts heat well — 23 W/m·K (13.3 BTU/hr·ft·°F), better than 78% of stainless steel grades
Limitations
- Low fracture toughness — 50 MPa·√m (45.5 ksi·√in), worse than 92% of stainless steel grades
- Needs corrosion protection — 42/100, worse than 90% of stainless steel grades
- Hard to polish — 55/100, worse than 89% of stainless steel grades
- Limited ductility — 20%, worse than 79% of stainless steel grades
- Difficult to weld — 45/100, worse than 79% of stainless steel grades
1.4724 +A properties
Typical room-temperature values for 1.4724 +A; 22 are specific to this condition. Other listed values are 1.4724 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
1.4724 +A has a density of 7.6 g/cm³ (0.275 lb/in³), lighter than 98% of stainless steel grades. It melts at 1,450°C (2,642 °F).
Mechanical16
1.4724 +A has a yield strength of 300 MPa (43.5 ksi) and a tensile strength of 560 MPa (81.2 ksi) — weaker than 68% of stainless steel grades. Elongation at break is 20% and the elastic modulus is 220 GPa (31.9 Msi).
Thermal6
1.4724 +A is rated for continuous service to 850°C (1,562 °F). It conducts heat at 23 W/m·K (13.3 BTU/hr·ft·°F), better than 78% of stainless steel grades. Thermal expansion is 10.5 µm/m·K (5.83 µin/in·°F).
Electrical3
1.4724 +A conducts electricity at 2.5 % IACS, better than 75% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is fair (42/100), worse than 90% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4724 +A takes about 42 MJ of energy and emits 3.2 kg of CO₂ — less than 95% of stainless steel grades. Typical recycled content is 60%.
Manufacturability7
1.4724 +A's machinability is fair (45/100, better than 84% of stainless steel grades); weldability fair (45/100); formability fair (50/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1.4724 +A
Is 1.4724 easy to machine?
Machines like a soft ferritic stainless — rigid setups, sharp positive-rake carbide, moderate speeds and heavy feeds to avoid work hardening and the gummy Al-bearing chip.
Can 1.4724 be welded?
Weldable by TIG/MIG/SMAW with preheat 150–300 °C, low heat input and post-weld anneal ~750–800 °C; use matching Cr-Al filler or 309/310-type austenitic consumables where ductile welds are required, as the HAZ coarsens and embrittles.
Can 1.4724 be formed, bent or molded?
Cold forms with generous bend radii (≥2t) at moderate ductility; warm forming 150–300 °C helps for severe bends, hot working range roughly 1100–800 °C with slow cooling.
What surface finishes work on 1.4724?
Not anodizable; supplied pickled/annealed or ground, and normally used with its own protective high-temperature oxide, aluminised or high-temperature silicone/ceramic paint for cosmetic parts.
1.4724 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 | ≤ 0.12 | 0.09 |
| Si | 0.7 – 1.4 | 1 |
| Mn | ≤ 1 | 0.5 |
| P | ≤ 0.04 | 0.03 |
| S | ≤ 0.02 | 0.01 |
| Cr | 12 – 14 | 13 |
| Alforms protective Al-rich oxide | 0.7 – 1.2 | 1 |
| Fe | balance | — |
1.4724 +A — frequently asked
What is 1.4724 +A used for?
1.4724 +A is typically used for exhaust manifolds, heater elements and furnace components. In short: mid-cost 850 °C ferritic; higher Cr than 1.4713; needs post-weld anneal.
What is the yield strength of 1.4724 +A?
1.4724 +A has a typical yield strength of 300 MPa (43.5 ksi) and a tensile strength of 560 MPa (81.2 ksi) — weaker than 68% of stainless steel grades. Strength varies by condition: see the 3 listed tempers.
Is 1.4724 +A easy to machine?
Reasonably — machinability is rated fair (45/100, better than 84% of stainless steel grades). Machines like a soft ferritic stainless — rigid setups, sharp positive-rake carbide, moderate speeds and heavy feeds to avoid work hardening and the gummy Al-bearing chip.
Can 1.4724 +A be welded?
With care — weldability is rated fair (45/100). Weldable by TIG/MIG/SMAW with preheat 150–300 °C, low heat input and post-weld anneal ~750–800 °C; use matching Cr-Al filler or 309/310-type austenitic consumables where ductile welds are required, as the HAZ coarsens and embrittles.
What surface finishes work on 1.4724 +A?
Not anodizable; supplied pickled/annealed or ground, and normally used with its own protective high-temperature oxide, aluminised or high-temperature silicone/ceramic paint for cosmetic parts.
Can 1.4724 +A be formed, bent or molded?
Cold forms with generous bend radii (≥2t) at moderate ductility; warm forming 150–300 °C helps for severe bends, hot working range roughly 1100–800 °C with slow cooling.
What is the maximum service temperature of 1.4724 +A?
1.4724 +A 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 1.4724 +A and 1.4724-SR?
+A is the default condition — standard supply condition for plate, bar and forgings destined for high-temperature service. SR: post-fabrication treatment to restore ductility and relieve welding/forming stresses before service. Yield strength is 300 MPa in +A versus 290 MPa in SR.
Sources
- EN 10095 — Heat resisting steels and nickel alloys — CEN (2018)
- EN 10088-1 — Stainless steels: list of stainless steels — CEN (2014)
- 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)
- Heat-resisting ferritic stainless steel datasheets (X10CrAlSi7/13/18/25) — European long-product and strip mills (2022)
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.