Stainless Steel S44536 Annealed
Temper · default condition
UNS S44536
Default stocked condition: maximum corrosion resistance and formability for heat-exchanger tube and sheet.
Values for the Annealed condition
Other S44536 tempers and conditions
S44536 is listed in 5 conditions; see the grade overview at S44536.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
AnnealedDefaultThis page mill annealed, pickled sheet/plate/tube | Default stocked condition: maximum corrosion resistance and formability for heat-exchanger tube and sheet. | 320 | 490 | 27 | 170 HB | 2.8 % IACS |
Stress relieved | Low-temperature stress relief after heavy forming; avoid 425–550 °C to prevent 475 °C embrittlement. | 330 | 500 | 25 | 173 HB | 2.8 % IACS |
As-welded deposit | Condition of thin-wall welded condenser tube supplied without post-weld anneal; stabilization keeps HAZ corrosion resistance but weld-zone toughness is the lowest of all conditions. | 330 | 490 | 20 | 178 HB | 2.8 % IACS |
Cold Worked 1/4 Hard | Light temper roll for extra stiffness/strength in strip where forming demand is modest. | 450 | 580 | 14 | 17 HRC | 2.8 % IACS |
Cold drawn | For close-tolerance bar and small-diameter tube; higher strength but reduced ductility. | 500 | 620 | 12 | 20 HRC | 2.8 % IACS |
What is S44536 Annealed?
S44536 Annealed is S44536 in the Annealed temper — default stocked condition: maximum corrosion resistance and formability for heat-exchanger tube and sheet. S44536 Annealed has a yield strength of 320 MPa (46.4 ksi) and a tensile strength of 490 MPa (71.1 ksi) — weaker than 60% of stainless steel grades. Elongation at break is 27% and the elastic modulus is 200 GPa (29 Msi). S44536 Annealed has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,450°C (2,642 °F).
Advantages
- Good corrosion resistance — 78/100, better than 84% of stainless steel grades
- Easy to machine — 45/100, better than 84% of stainless steel grades
- Low embodied carbon — 3.6 kg CO₂/kg, better than 83% of stainless steel grades
- High electrical conductivity — 2.8 % IACS, better than 79% of stainless steel grades
Limitations
- Low fracture toughness — 70 MPa·√m (63.7 ksi·√in), worse than 83% of stainless steel grades
- Limited service temperature — 400°C (752 °F), worse than 78% of stainless steel grades
S44536 Annealed properties
Typical room-temperature values for S44536 Annealed; 22 are specific to this condition. Other listed values are S44536 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
S44536 Annealed has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,450°C (2,642 °F).
Mechanical16
S44536 Annealed has a yield strength of 320 MPa (46.4 ksi) and a tensile strength of 490 MPa (71.1 ksi) — weaker than 60% of stainless steel grades. Elongation at break is 27% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
S44536 Annealed is rated for continuous service to 400°C (752 °F). It conducts heat at 20 W/m·K (11.6 BTU/hr·ft·°F), better than 74% of stainless steel grades. Thermal expansion is 10 µm/m·K (5.56 µin/in·°F).
Electrical3
S44536 Annealed conducts electricity at 2.8 % IACS, better than 79% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is very good (78/100), better than 84% of stainless steel grades.
Sustainability4
Producing a kilogram of S44536 Annealed takes about 55 MJ of energy and emits 3.6 kg of CO₂ — more than 50% of stainless steel grades. Typical recycled content is 60%.
Manufacturability7
S44536 Annealed's machinability is fair (45/100, better than 84% of stainless steel grades); weldability good (55/100); 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 S44536 Annealed
Is S44536 easy to machine?
Machines like a soft, gummy ferritic: use rigid setups, sharp positive-rake carbide, heavy feeds and flood coolant to avoid built-up edge and work hardening.
Can S44536 be welded?
GTAW/plasma with argon (add He for penetration), low heat input, matching stabilized filler or an over-alloyed Ni/duplex filler; keep thickness thin and interpass temperature low to limit HAZ grain coarsening and toughness loss.
Can S44536 be formed, bent or molded?
Good roll, bend and stretch forming at room temperature with generous radii; springback is higher and deep-drawability lower than austenitics, so plan for warm forming on severe parts.
What surface finishes work on S44536?
Pickle and passivate after hot work or welding to restore the Cr-Mo passive film; polishes well to a bright finish, no anodizing — protect from iron contamination during fabrication.
S44536 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 interstitial; stabilized | ≤ 0.03 | 0.02 |
| Si | ≤ 0.75 | 0.4 |
| Mn | ≤ 0.75 | 0.4 |
| P | ≤ 0.04 | — |
| S | ≤ 0.02 | — |
| Cr26Cr class | 25 – 27.5 | 26 |
| Mo | 0.75 – 1.5 | 1 |
| Nikept low for SCC immunity | ≤ 0.5 | 0.2 |
| Cu | ≤ 0.2 | — |
| N | ≤ 0.04 | 0.02 |
| Ti+Nbcombined stabilizer; the Ti/Nb split is what distinguishes this registration — verify against the governing mill certificate | 0.2 – 0.8 | 0.45 |
| Fe | balance | — |
S44536 Annealed — frequently asked
What is S44536 Annealed used for?
S44536 Annealed is typically used for exhaust manifolds and hot-end tubing, heat exchanger tubing, flue and vent components, condensate-exposed exhaust silencers, hot water equipment shells and industrial ducting sections. In short: weldability-tuned 26Cr ferritic; strong chloride resistance rating; thin-gauge tube and sheet grade.
What is the yield strength of S44536 Annealed?
S44536 Annealed has a typical yield strength of 320 MPa (46.4 ksi) and a tensile strength of 490 MPa (71.1 ksi) — weaker than 60% of stainless steel grades. Strength varies by condition: see the 5 listed tempers.
Is S44536 Annealed easy to machine?
Reasonably — machinability is rated fair (45/100, better than 84% of stainless steel grades). Machines like a soft, gummy ferritic: use rigid setups, sharp positive-rake carbide, heavy feeds and flood coolant to avoid built-up edge and work hardening.
Can S44536 Annealed be welded?
Yes — weldability is rated good (55/100). GTAW/plasma with argon (add He for penetration), low heat input, matching stabilized filler or an over-alloyed Ni/duplex filler; keep thickness thin and interpass temperature low to limit HAZ grain coarsening and toughness loss.
What surface finishes work on S44536 Annealed?
Pickle and passivate after hot work or welding to restore the Cr-Mo passive film; polishes well to a bright finish, no anodizing — protect from iron contamination during fabrication.
Can S44536 Annealed be formed, bent or molded?
Good roll, bend and stretch forming at room temperature with generous radii; springback is higher and deep-drawability lower than austenitics, so plan for warm forming on severe parts.
What is the maximum service temperature of S44536 Annealed?
S44536 Annealed is rated for continuous use to about 400°C (752 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between S44536 Annealed and S44536-CD?
Annealed is the default condition — default stocked condition: maximum corrosion resistance and formability for heat-exchanger tube and sheet. CD: for close-tolerance bar and small-diameter tube; higher strength but reduced ductility. Yield strength is 320 MPa in Annealed versus 500 MPa in CD.
Sources
- ASTM A240/A240M — Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip — ASTM International (2023)
- ASTM A268/A268M — Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing — ASTM International (2022)
- SAE J1086 / ASTM DS-56 — Metals & Alloys in the Unified Numbering System (UNS) — SAE International / ASTM (2017)
- 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)
- Superferritic 26Cr-1Mo stainless tubing and sheet data (26-1 class) — specialty stainless producers (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.