Stainless Steel S44627
UNS S44627 · ASTM XM-27
S44627 (XM-27, E-Brite) is a high-purity 26Cr-1Mo super-ferritic stainless steel with extremely low interstitials, available as annealed plate, sheet and bar, cold-drawn and cold-rolled product, and welded tube.
Reference datasheet — S44627 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
S44627 tempers and conditions
S44627 is supplied in 4 conditions, soft to hard. Annealed is the default FabDigit quotes; the values on this page are for it.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
AnnealedDefault mill annealed sheet/strip/plate (ASTM A240) | Standard stocked condition for heat-exchanger and vessel plate/sheet; maximum corrosion resistance and ductility. | 345 | 490 | 30 | 160 HB | — |
autogenous GTAW joint, no post-weld anneal | Reference condition for fabricated joints: corrosion resistance is retained if shielding is clean, but weld-zone toughness and ductility drop sharply. | 350 | 490 | 12 | 175 HB | 2.9 % IACS |
2B/BA cold rolled sheet and strip | Thin gauge for tubing stock, formed parts and linings where surface finish matters. | 355 | 500 | 30 | 165 HB | 2.9 % IACS |
cold drawn / cold finished bar | Choose for higher strength, tighter tolerance and better chip control in screw-machine parts. | 520 | 620 | 15 | 18 HRC | 2.9 % IACS |
Supply forms, finishes and certifications
Ways S44627 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
Annealed Bar | Hot finished / annealed bar and forgings | Supply form |
Annealed Plate | Hot rolled, annealed and descaled plate | Supply form |
Welded Tube Annealed | Welded Tube, Annealed | Supply form |
What is S44627?
S44627 (XM-27, E-Brite) is a high-purity 26Cr-1Mo super-ferritic stainless steel with extremely low interstitials, available as annealed plate, sheet and bar, cold-drawn and cold-rolled product, and welded tube. Engineers select it for excellent resistance to chloride pitting and stress-corrosion cracking and for weldability without sensitization, at 345 MPa yield, 490 MPa tensile and 30 % elongation. Limits are a ductile-to-brittle transition near room temperature in heavier gauges, sensitivity to carbon, nitrogen and oxygen pickup when welding, and a 315 °C service ceiling. S44660 is the usual alternative for thicker sections. S44627 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). S44627 has a yield strength of 345 MPa (50 ksi) and a tensile strength of 490 MPa (71.1 ksi) — weaker than 54% of stainless steel grades. Elongation at break is 30% and the elastic modulus is 200 GPa (29 Msi).
What is S44627 used for?
- seawater heat exchangers
- pulp/paper bleach plant equipment
- chemical process piping
Advantages
- High electrical conductivity — 2.9 % IACS, better than 87% of stainless steel grades
- 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 — 3.8 kg CO₂/kg, better than 77% of stainless steel grades
Limitations
- Limited service temperature — 315°C (599 °F), worse than 85% of stainless steel grades
S44627 properties
Typical room-temperature values for S44627-Annealed; bars are the position among stainless steel grades.
Physical3
S44627 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
S44627 has a yield strength of 345 MPa (50 ksi) and a tensile strength of 490 MPa (71.1 ksi) — weaker than 54% of stainless steel grades. Elongation at break is 30% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
S44627 is rated for continuous service to 315°C (599 °F). It conducts heat at 17.5 W/m·K (10.1 BTU/hr·ft·°F), better than 72% of stainless steel grades. Thermal expansion is 9.9 µm/m·K (5.5 µin/in·°F).
Electrical3
S44627 conducts electricity at 2.9 % IACS, better than 87% 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 S44627 takes about 52 MJ of energy and emits 3.8 kg of CO₂ — less than 76% of stainless steel grades. Typical recycled content is 55%.
Manufacturability7
S44627'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. S44627 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with S44627
Is S44627 easy to machine?
Machines like 26Cr ferritic stainless — gummy and abrasive at ~50 % of 1212; use rigid setups, sharp positive-rake carbide, heavy feeds and flood coolant to avoid work hardening.
Can S44627 be welded?
Autogenous GTAW or matching high-purity filler with ultra-clean argon (backing gas mandatory); any carbon, nitrogen or oxygen pickup destroys weld ductility and corrosion resistance — keep heat input low and interpass cool.
Can S44627 be formed, bent or molded?
Cold forms and deep draws reasonably in thin gauge; avoid tight bends in heavy plate and warm-form (150–250 °C) thick sections because of the near-room-temperature ductile-brittle transition.
S44627 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 |
|---|---|---|
| CC+N ≤ 0.025 % | ≤ 0.01 | 0.01 |
| Mn | ≤ 0.4 | 0.2 |
| Si | ≤ 0.4 | 0.2 |
| P | ≤ 0.02 | 0.01 |
| S | ≤ 0.02 | 0.01 |
| Cr | 25 – 27.5 | 26 |
| Mo | 0.75 – 1.5 | 1 |
| Ni | ≤ 0.5 | 0.15 |
| Cu | ≤ 0.2 | 0.05 |
| N | ≤ 0.02 | 0.01 |
| Nbcolumbium stabilizer, ≥ 8×(C+N) | 0.05 – 0.2 | 0.1 |
| Fe | balance |
What surface finishes work on S44627?
Pickle and passivate per ASTM A967 after hot work or welding; polishes to a bright finish, not anodizable, and paints/plates only with standard stainless surface preparation.
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
Equivalent designations
Standards and trade names that resolve to Stainless Steel S44627 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- ASTM
- XM-27
- Trade names
- E-Brite
How much does S44627 cost?
S44627 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.
S44627 — frequently asked
What is S44627 used for?
S44627 is typically used for seawater heat exchangers, pulp/paper bleach plant equipment and chemical process piping. In short: high-purity 26Cr-1Mo ferritic; welds without sensitization; chloride SCC resistant.
What is the yield strength of S44627?
S44627 has a typical yield strength of 345 MPa (50 ksi) and a tensile strength of 490 MPa (71.1 ksi) — weaker than 54% of stainless steel grades. Strength varies by condition: see the 4 listed tempers.
Is S44627 easy to machine?
Reasonably — machinability is rated fair (45/100, better than 84% of stainless steel grades). Machines like 26Cr ferritic stainless — gummy and abrasive at ~50 % of 1212; use rigid setups, sharp positive-rake carbide, heavy feeds and flood coolant to avoid work hardening.
Can S44627 be welded?
Yes — weldability is rated good (55/100). Autogenous GTAW or matching high-purity filler with ultra-clean argon (backing gas mandatory); any carbon, nitrogen or oxygen pickup destroys weld ductility and corrosion resistance — keep heat input low and interpass cool.
What surface finishes work on S44627?
Pickle and passivate per ASTM A967 after hot work or welding; polishes to a bright finish, not anodizable, and paints/plates only with standard stainless surface preparation.
Can S44627 be formed, bent or molded?
Cold forms and deep draws reasonably in thin gauge; avoid tight bends in heavy plate and warm-form (150–250 °C) thick sections because of the near-room-temperature ductile-brittle transition.
What is the maximum service temperature of S44627?
S44627 is rated for continuous use to about 315°C (599 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does S44627 cost?
S44627 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 Stainless Steel Tubing — ASTM International (2022)
- ASTM A176 / A276 / A479 — Stainless Steel Bar, Shapes and Strip — ASTM International (2022)
- 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)
- E-BRITE 26-1 (UNS S44627) alloy datasheet — ATI / Allegheny Technologies (2014)
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.