Stainless Steel S44536
UNS S44536
S44536 is a close chemistry variant of the 26Cr stabilized ferritic family, specified where a slightly different Ti/Nb stabilization ratio is required for weldability.
Reference datasheet — S44536 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the Annealed condition
S44536 tempers and conditions
S44536 is supplied in 5 conditions, soft to hard. Annealed is the default FabDigit quotes; the values on this page are for it.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
AnnealedDefault 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 |
Supply forms, finishes and certifications
Ways S44536 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
2B | Cold Rolled, Annealed, Pickled, Skin-Passed | Surface finish |
BA | Bright Annealed | Surface finish |
HRAP | Hot Rolled, Annealed & Pickled | Surface finish |
What is S44536?
S44536 is a close chemistry variant of the 26Cr stabilized ferritic family, specified where a slightly different Ti/Nb stabilization ratio is required for weldability. It is used mainly as exhaust sheet and heat-exchanger tubing in annealed, HRAP, 2B, BA, 1/4-hard, cold-drawn, stress-relieved and as-welded conditions; annealed values are 320 MPa yield, 490 MPa tensile, 27 % elongation and 170 HB (85 HRB). Corrosion resistance scores 78 but formability is only 60, so plan warm forming for severe parts or move to S44535 or Type 444 for deeper draws. S44536 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). S44536 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).
What is S44536 used for?
- Exhaust manifolds and hot-end tubing
- Heat exchanger tubing
- Flue and vent components
- Condensate-exposed exhaust silencers
- Hot water equipment shells
- Industrial ducting sections
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 properties
Typical room-temperature values for S44536-Annealed; bars are the position among stainless steel grades.
Physical3
S44536 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 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 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 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 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'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. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the stainless steel family
Yield strength against density for every stainless steel grade FabDigit runs. S44536 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with S44536
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.
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 |
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.
Surface treatments FabDigit runs on stainless steel parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Passivation
Organic Coating
Thermal Spray
How much does S44536 cost?
S44536 is a high-cost stainless steel ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
S44536 — frequently asked
What is S44536 used for?
S44536 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?
S44536 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 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 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?
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 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?
S44536 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.
How much does S44536 cost?
S44536 is a high-cost stainless steel ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
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; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.