Stainless Steel S44625
UNS S44625
S44625 is a 26Cr-1Mo titanium-stabilized ferritic stainless with good chloride pitting resistance, positioned below the super-ferritic E-Brite grade in purity and cost.
Reference datasheet — S44625 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 ANN condition
S44625 tempers and conditions
S44625 is supplied in 3 conditions, soft to hard. ANN is the default FabDigit quotes; the values on this page are for it.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
As-welded deposit | Represents joint properties when post-weld annealing is impossible; expect coarse HAZ grains and much lower notch toughness. | 370 | 490 | 15 | 185 HB | 2.9 % IACS |
ANNDefault Annealed | Standard supply condition for all product forms; best combination of corrosion resistance, ductility and formability. | 380 | 500 | 28 | 175 HB | 2.9 % IACS |
Cold drawn | Bar stock with tighter tolerance and higher strength for machined fittings, valve trim and fasteners. | 500 | 600 | 16 | 210 HB | 2.9 % IACS |
Supply forms, finishes and certifications
Ways S44625 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
Tube-Ann | Welded or seamless tube, annealed | Supply form |
CRA-2B | Cold rolled, annealed and pickled sheet | Surface finish |
HRAP | Hot rolled, annealed and pickled plate | Surface finish |
What is S44625?
S44625 is a 26Cr-1Mo titanium-stabilized ferritic stainless with good chloride pitting resistance, positioned below the super-ferritic E-Brite grade in purity and cost. It is used for heat-exchanger and chemical process tube and sheet in ANN, 2B cold-rolled, HRAP, cold-drawn and annealed tube conditions; annealed values are 380 MPa yield, 500 MPa tensile, 28 % elongation and 175 HB (88 HRB), with a corrosion score of 74. Formability is limited (60) and HAZ grain growth plus interstitial pickup restrict it to thin gauge, so choose 316L or duplex 2205 for heavy welded sections. S44625 has a density of 7.67 g/cm³ (0.277 lb/in³), lighter than 95% of stainless steel grades. It melts at 1,450°C (2,642 °F). S44625 has a yield strength of 380 MPa (55.1 ksi) and a tensile strength of 500 MPa (72.5 ksi) — stronger than 52% of stainless steel grades. Elongation at break is 28% and the elastic modulus is 200 GPa (29 Msi).
What is S44625 used for?
- heat exchangers
- brine handling equipment
- chemical process tubing
Advantages
- Easy to machine — 48/100, better than 88% of stainless steel grades
- High electrical conductivity — 2.9 % IACS, better than 87% of stainless steel grades
- Low embodied carbon — 3.6 kg CO₂/kg, better than 83% of stainless steel grades
- Good corrosion resistance — 74/100, better than 78% of stainless steel grades
- Conducts heat well — 20.5 W/m·K (11.8 BTU/hr·ft·°F), better than 75% of stainless steel grades
Limitations
- Limited service temperature — 300°C (572 °F), worse than 90% of stainless steel grades
S44625 properties
Typical room-temperature values for S44625-ANN; bars are the position among stainless steel grades.
Physical3
S44625 has a density of 7.67 g/cm³ (0.277 lb/in³), lighter than 95% of stainless steel grades. It melts at 1,450°C (2,642 °F).
Mechanical15
S44625 has a yield strength of 380 MPa (55.1 ksi) and a tensile strength of 500 MPa (72.5 ksi) — stronger than 52% of stainless steel grades. Elongation at break is 28% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
S44625 is rated for continuous service to 300°C (572 °F). It conducts heat at 20.5 W/m·K (11.8 BTU/hr·ft·°F), better than 75% of stainless steel grades. Thermal expansion is 9.9 µm/m·K (5.5 µin/in·°F).
Electrical3
S44625 conducts electricity at 2.9 % IACS, better than 87% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is very good (74/100), better than 78% of stainless steel grades.
Sustainability4
Producing a kilogram of S44625 takes about 55 MJ of energy and emits 3.6 kg of CO₂ — more than 50% of stainless steel grades. Typical recycled content is 45%.
Manufacturability7
S44625's machinability is fair (48/100, better than 88% 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. S44625 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with S44625
Is S44625 easy to machine?
Machines like a gummy ferritic — use rigid setups, sharp positive-rake carbide, heavy feeds and generous coolant; expect ~half the rate of 12L14.
Can S44625 be welded?
Autogenous GTAW/plasma or matching low-interstitial filler with very low heat input and rigorous Ar shielding/backing; grain growth and interstitial pickup in the HAZ are the main risks — no preheat, keep interpass low.
Can S44625 be formed, bent or molded?
Cold forms and roll-forms adequately in thin gauge with generous bend radii (≥1t) and allowance for springback; avoid severe deep drawing and forming below ~15 °C.
S44625 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 |
|---|---|---|
| Cr | 25 – 27.5 | 26 |
| Mo | 0.75 – 1.5 | 1 |
| Ni | ≤ 0.5 | 0.15 |
| Tistabilizer, typically ≥7×(C+N) | 0.05 – 0.4 | 0.2 |
| Clow-interstitial melt | ≤ 0.01 | 0.01 |
| NC+N generally ≤0.025 % | ≤ 0.02 | 0.01 |
| Mn | ≤ 0.4 | 0.25 |
| Si | ≤ 0.4 | 0.3 |
| Cu | ≤ 0.2 | 0.05 |
| P | ≤ 0.02 | 0.02 |
| S | ≤ 0.02 | 0.01 |
| Fe | balance |
What surface finishes work on S44625?
Passivate per ASTM A967 (nitric or citric) or electropolish after pickling; not anodizable, and the ferritic structure takes a good but slightly duller polish than austenitics.
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 S44625 cost?
S44625 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.
S44625 — frequently asked
What is S44625 used for?
S44625 is typically used for heat exchangers, brine handling equipment and chemical process tubing. In short: 26Cr-1Mo chloride-resistant ferritic; lower-cost E-Brite alternative; thin-gauge tubing grade.
What is the yield strength of S44625?
S44625 has a typical yield strength of 380 MPa (55.1 ksi) and a tensile strength of 500 MPa (72.5 ksi) — stronger than 52% of stainless steel grades. Strength varies by condition: see the 3 listed tempers.
Is S44625 easy to machine?
Reasonably — machinability is rated fair (48/100, better than 88% of stainless steel grades). Machines like a gummy ferritic — use rigid setups, sharp positive-rake carbide, heavy feeds and generous coolant; expect ~half the rate of 12L14.
Can S44625 be welded?
Yes — weldability is rated good (55/100). Autogenous GTAW/plasma or matching low-interstitial filler with very low heat input and rigorous Ar shielding/backing; grain growth and interstitial pickup in the HAZ are the main risks — no preheat, keep interpass low.
What surface finishes work on S44625?
Passivate per ASTM A967 (nitric or citric) or electropolish after pickling; not anodizable, and the ferritic structure takes a good but slightly duller polish than austenitics.
Can S44625 be formed, bent or molded?
Cold forms and roll-forms adequately in thin gauge with generous bend radii (≥1t) and allowance for springback; avoid severe deep drawing and forming below ~15 °C.
What is the maximum service temperature of S44625?
S44625 is rated for continuous use to about 300°C (572 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between S44625-ANN and S44625-CD?
ANN is the default condition — standard supply condition for all product forms; best combination of corrosion resistance, ductility and formability. CD: bar stock with tighter tolerance and higher strength for machined fittings, valve trim and fasteners. Yield strength is 380 MPa in ANN versus 500 MPa in CD.
How much does S44625 cost?
S44625 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 A268/A268M — Seamless and Welded Ferritic Stainless Steel Tubing — ASTM International (2022)
- ASTM A240/A240M — Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip — ASTM International (2023)
- Metals and Alloys in the Unified Numbering System (UNS), 13th ed. — SAE/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)
- ASM Handbook Vol.6 — Welding, Brazing and Soldering — ASM International (1993)
- 26Cr-1Mo super-ferritic stainless tubing data (26-1 family) — Specialty stainless producers (2020)
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.