Stainless Steel S44635 AS-WELDED
Other
UNS S44635
Field/fabrication condition; expect reduced HAZ toughness and slightly lower pitting resistance unless interstitials are strictly controlled.
Values for the AS-WELDED condition
Other S44635 tempers and conditions
S44635 is listed in 3 conditions; see the grade overview at S44635.
- AS-WELDED
- Annealed
- Cold Worked
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
AS-WELDEDThis page autogenous or filler weld without post-weld anneal | Field/fabrication condition; expect reduced HAZ toughness and slightly lower pitting resistance unless interstitials are strictly controlled. | 490 | 660 | 20 | 18 HRC | 2.2 % IACS |
AnnealedDefault solution annealed and quenched (plate/sheet/bar) | Standard supply condition for plate, sheet and bar; best corrosion resistance and toughness. | 500 | 680 | 27 | 16 HRC | 2.2 % IACS |
cold drawn / cold rolled, not re-annealed | Choose when higher strength and tighter dimensional tolerance are needed and severe crevice-corrosion service is not the driver. | 650 | 790 | 15 | 24 HRC | 2.2 % IACS |
What is S44635 AS-WELDED?
S44635 AS-WELDED is S44635 in the AS-WELDED condition — field/fabrication condition; expect reduced HAZ toughness and slightly lower pitting resistance unless interstitials are strictly controlled. S44635 AS-WELDED has a yield strength of 490 MPa (71.1 ksi) and a tensile strength of 660 MPa (95.7 ksi) — stronger than 76% of stainless steel grades. Elongation at break is 20% and the elastic modulus is 205 GPa (29.7 Msi). S44635 AS-WELDED has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,420°C (2,588 °F). Annealed is the default condition FabDigit quotes; AS-WELDED is available on request or by drawing note.
Advantages
- Good corrosion resistance — 74/100, better than 78% of stainless steel grades
- High strength — 490 MPa (71.1 ksi), better than 76% of stainless steel grades
Limitations
- Limited service temperature — 250°C (482 °F), worse than 99% of stainless steel grades
- Low fracture toughness — 40 MPa·√m (36.4 ksi·√in), worse than 97% of stainless steel grades
- Limited ductility — 20%, worse than 79% of stainless steel grades
- Difficult to weld — 45/100, worse than 79% of stainless steel grades
S44635 AS-WELDED properties
Typical room-temperature values for S44635 AS-WELDED; 23 are specific to this condition. Other listed values are S44635 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
S44635 AS-WELDED has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,420°C (2,588 °F).
Mechanical17
S44635 AS-WELDED has a yield strength of 490 MPa (71.1 ksi) and a tensile strength of 660 MPa (95.7 ksi) — stronger than 76% of stainless steel grades. Elongation at break is 20% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal5
S44635 AS-WELDED is rated for continuous service to 250°C (482 °F). It conducts heat at 15 W/m·K (8.67 BTU/hr·ft·°F), worse than 59% of stainless steel grades. Thermal expansion is 10.4 µm/m·K (5.78 µin/in·°F).
Electrical3
S44635 AS-WELDED conducts electricity at 2.2 % IACS, worse than 61% 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 S44635 AS-WELDED takes about 62 MJ of energy and emits 5.4 kg of CO₂ — more than 75% of stainless steel grades. Typical recycled content is 55%.
Manufacturability6
S44635 AS-WELDED's machinability is fair (40/100, better than 72% of stainless steel grades); weldability fair (45/100); formability fair (35/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with S44635 AS-WELDED
Is S44635 easy to machine?
Machines similar to 26-1 ferritics — rigid setup, sharp positive-rake carbide, moderate speed and heavy positive feed to avoid work-hardened glazing; better chip control than 316L.
Can S44635 be welded?
Weldable by GTAW/PAW with very low heat input, high-purity argon (with He) shielding and full back-purge; use matched or Ni-base filler and keep interstitial pickup minimal, no preheat, no PWHT above 300 °C.
Can S44635 be formed, bent or molded?
Cold formable in thin gauge with generous bend radii (≥2t) and springback allowance; hot work 900–1100 °C followed by anneal at ~1000–1050 °C with rapid cooling.
What surface finishes work on S44635?
Pickle and passivate in HNO3-HF after welding to restore the chromium oxide film; polishes to a bright finish and does not anodize (n/a for stainless).
S44635 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 ≤ 0.045 | ≤ 0.03 | 0.02 |
| NC+N ≤ 0.045 | ≤ 0.04 | 0.02 |
| Mn | ≤ 1 | 0.4 |
| Si | ≤ 0.75 | 0.4 |
| P | ≤ 0.04 | 0.02 |
| S | ≤ 0.03 | 0 |
| Cr | 24.5 – 26 | 25 |
| Ni | 3.5 – 4.5 | 4 |
| Mo | 3.5 – 4.5 | 4 |
| Ti+Nbmin 0.20 + 4(C+N); stabilizers | 0.2 – 0.8 | 0.4 |
| Fe | balance | — |
S44635 AS-WELDED — frequently asked
What is S44635 AS-WELDED used for?
S44635 AS-WELDED is typically used for seawater heat exchangers, desalination equipment and offshore piping. In short: nickel-toughened super-ferritic; 500 MPa yield ferritic; seawater crevice resistance.
What is the yield strength of S44635 AS-WELDED?
S44635 AS-WELDED has a typical yield strength of 490 MPa (71.1 ksi) and a tensile strength of 660 MPa (95.7 ksi) — stronger than 76% of stainless steel grades. Strength varies by condition: see the 3 listed tempers.
Is S44635 AS-WELDED easy to machine?
Not especially — machinability is rated fair (40/100, better than 72% of stainless steel grades). Machines similar to 26-1 ferritics — rigid setup, sharp positive-rake carbide, moderate speed and heavy positive feed to avoid work-hardened glazing; better chip control than 316L.
Can S44635 AS-WELDED be welded?
With care — weldability is rated fair (45/100). Weldable by GTAW/PAW with very low heat input, high-purity argon (with He) shielding and full back-purge; use matched or Ni-base filler and keep interstitial pickup minimal, no preheat, no PWHT above 300 °C.
What surface finishes work on S44635 AS-WELDED?
Pickle and passivate in HNO3-HF after welding to restore the chromium oxide film; polishes to a bright finish and does not anodize (n/a for stainless).
Can S44635 AS-WELDED be formed, bent or molded?
Cold formable in thin gauge with generous bend radii (≥2t) and springback allowance; hot work 900–1100 °C followed by anneal at ~1000–1050 °C with rapid cooling.
What is the maximum service temperature of S44635 AS-WELDED?
S44635 AS-WELDED is rated for continuous use to about 250°C (482 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
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)
- UNS S44635 alloy designation (SAE/ASTM DS-56 Metals & Alloys in the Unified Numbering System) — SAE International / ASTM (2017)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels, and High-Performance Alloys (superferritic stainless steels) — ASM International (1990)
- MONIT 25-4-4 superferritic stainless steel datasheet — Nyby / Outokumpu lineage (2010)
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.