Stainless Steel 1.4736 Annealed
Temper · default condition
EN 1.4736 · UNS S44735 · also 18SR
Standard stocked condition for exhaust and heat-exchanger fabrication; best combination of formability and oxidation resistance.
Values for the Annealed condition
Other 1.4736 tempers and conditions
1.4736 is listed in 2 conditions; see the grade overview at 1.4736.
- Annealed
- CR-1/4H
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
AnnealedDefaultThis page cold rolled sheet/strip, mill annealed (2B) | Standard stocked condition for exhaust and heat-exchanger fabrication; best combination of formability and oxidation resistance. | 320 | 510 | 28 | 170 HB | 2.2 % IACS |
1/4 Hard | Use when extra stiffness and flatness are needed for shallow-formed clamps, shields and spring-like parts; forming reserve is limited. | 480 | 590 | 10 | 15 HRC | 2.2 % IACS |
What is 1.4736 Annealed?
1.4736 Annealed is 1.4736 in the Annealed temper — standard stocked condition for exhaust and heat-exchanger fabrication; best combination of formability and oxidation resistance. 1.4736 Annealed has a yield strength of 320 MPa (46.4 ksi) and a tensile strength of 510 MPa (74 ksi) — weaker than 60% of stainless steel grades. Elongation at break is 28% and the elastic modulus is 200 GPa (29 Msi). 1.4736 Annealed has a density of 7.45 g/cm³ (0.269 lb/in³), lighter than 100% of stainless steel grades. It melts at 1,450°C (2,642 °F).
Advantages
- High service temperature — 1,050°C (1,922 °F), better than 91% of stainless steel grades
- Easy to machine — 48/100, better than 88% of stainless steel grades
- Low embodied carbon — 3.6 kg CO₂/kg, better than 83% of stainless steel grades
- Conducts heat well — 21 W/m·K (12.1 BTU/hr·ft·°F), better than 76% of stainless steel grades
Limitations
- Low fracture toughness — 45 MPa·√m (41 ksi·√in), worse than 95% of stainless steel grades
- Hard to polish — 60/100, worse than 80% of stainless steel grades
1.4736 Annealed properties
Typical room-temperature values for 1.4736 Annealed; 22 are specific to this condition. Other listed values are 1.4736 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
1.4736 Annealed has a density of 7.45 g/cm³ (0.269 lb/in³), lighter than 100% of stainless steel grades. It melts at 1,450°C (2,642 °F).
Mechanical16
1.4736 Annealed has a yield strength of 320 MPa (46.4 ksi) and a tensile strength of 510 MPa (74 ksi) — weaker than 60% of stainless steel grades. Elongation at break is 28% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
1.4736 Annealed is rated for continuous service to 1,050°C (1,922 °F). It conducts heat at 21 W/m·K (12.1 BTU/hr·ft·°F), better than 76% of stainless steel grades. Thermal expansion is 10.5 µm/m·K (5.83 µin/in·°F).
Electrical3
1.4736 Annealed conducts electricity at 2.2 % IACS, worse than 61% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (55/100), worse than 71% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4736 Annealed takes about 53 MJ of energy and emits 3.6 kg of CO₂ — less than 67% of stainless steel grades. Typical recycled content is 65%.
Manufacturability7
1.4736 Annealed's machinability is fair (48/100, better than 88% of stainless steel grades); weldability good (65/100); formability good (62/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1.4736 Annealed
Is 1.4736 easy to machine?
Machines like a soft ferritic stainless — use sharp positive-rake carbide, rigid setups, generous feed and coolant to avoid the gummy built-up edge caused by Ti carbonitrides.
Can 1.4736 be welded?
Readily GTAW/laser/resistance welded thanks to Ti stabilization; keep heat input low, avoid preheat above ~150 °C, and use 430Ti/439 or 309L filler — expect HAZ grain coarsening and reduced RT toughness.
Can 1.4736 be formed, bent or molded?
Good cold bending, roll-forming and moderate deep drawing in the annealed condition; springback is lower than austenitics but total elongation and stretch-forming limits are noticeably tighter than 304.
What surface finishes work on 1.4736?
Pickle and passivate after hot work; the alumina-forming surface is inherently scale-resistant, so no coating is normally required — avoid aluminizing on top and never anodize.
1.4736 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 |
|---|---|---|
| Clow carbon for weldability | ≤ 0.03 | 0.02 |
| Si | ≤ 1 | 0.4 |
| Mn | ≤ 1 | 0.4 |
| P | ≤ 0.04 | — |
| S | ≤ 0.02 | — |
| Cr | 17 – 18.5 | 18 |
| Alforms protective alumina-rich scale | 1.6 – 2.4 | 2 |
| Tistabilizer for C and N | 0.2 – 0.6 | 0.4 |
| N | ≤ 0.03 | — |
| Fe | balance | — |
1.4736 Annealed — frequently asked
What is 1.4736 Annealed used for?
1.4736 Annealed is typically used for automotive exhaust, high-temperature ducting and industrial furnace parts. In short: highest-temperature ferritic here; alumina-forming, 1050 °C rated; nickel-free heat-resisting sheet.
What is the yield strength of 1.4736 Annealed?
1.4736 Annealed has a typical yield strength of 320 MPa (46.4 ksi) and a tensile strength of 510 MPa (74 ksi) — weaker than 60% of stainless steel grades. Strength varies by condition: see the 2 listed tempers.
Is 1.4736 Annealed easy to machine?
Reasonably — machinability is rated fair (48/100, better than 88% of stainless steel grades). Machines like a soft ferritic stainless — use sharp positive-rake carbide, rigid setups, generous feed and coolant to avoid the gummy built-up edge caused by Ti carbonitrides.
Can 1.4736 Annealed be welded?
Yes — weldability is rated good (65/100). Readily GTAW/laser/resistance welded thanks to Ti stabilization; keep heat input low, avoid preheat above ~150 °C, and use 430Ti/439 or 309L filler — expect HAZ grain coarsening and reduced RT toughness.
What surface finishes work on 1.4736 Annealed?
Pickle and passivate after hot work; the alumina-forming surface is inherently scale-resistant, so no coating is normally required — avoid aluminizing on top and never anodize.
Can 1.4736 Annealed be formed, bent or molded?
Good cold bending, roll-forming and moderate deep drawing in the annealed condition; springback is lower than austenitics but total elongation and stretch-forming limits are noticeably tighter than 304.
What is the maximum service temperature of 1.4736 Annealed?
1.4736 Annealed 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.
Sources
- EN 10088-2 Stainless steels — Technical delivery conditions for sheet/plate and strip for general purposes (X3CrAlTi18-2, 1.4736) — CEN (2014)
- EN 10088-1 Stainless steels — List of stainless steels (physical properties) — CEN (2014)
- 18 SR alloy (18Cr-2Al-Ti heat-resisting ferritic stainless) technical data — Allegheny Ludlum / ATI (2000)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels, and High-Performance Alloys (ferritic stainless steels) — ASM International (1990)
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.