Stainless Steel S30441
UNS S30441
S30441 is a nitrogen-strengthened 18Cr-9Ni austenitic stainless that uses interstitial nitrogen to raise strength above standard 304 while keeping austenitic weldability and formability.
Reference datasheet — S30441 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
S30441 tempers and conditions
S30441 is supplied in 7 conditions, soft to hard. Annealed is the default FabDigit quotes; the values on this page are for it.
Compare all 7 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
weld metal / HAZ, no post-weld solution treatment | Reference condition for fabricated assemblies that cannot be re-solution annealed. | 380 | 660 | 35 | 190 HB | 2.3 % IACS |
AnnealedDefault solution annealed (1040–1120 °C, water quenched) | Standard stocked condition for plate, sheet, bar and tube; maximum ductility and corrosion resistance. | 390 | 700 | 48 | 195 HB | — |
Quarter hard | Light cold work for springy sheet/strip that must still be bent and formed. | 590 | 900 | 14 | 26 HRC | 2.3 % IACS |
Cold drawn | Choose for straight, close-tolerance bar with a modest strength boost over annealed. | 620 | 820 | 25 | 24 HRC | 2.3 % IACS |
Half hard | Structural strip/sheet where high yield strength matters more than bendability. | 830 | 1,080 | 9 | 33 HRC | 2.3 % IACS |
Three-quarter hard | Near-maximum strength strip for flat springs, clamps and shims. | 1,000 | 1,240 | 5 | 37 HRC | 2.3 % IACS |
Full hard | Maximum as-rolled strength; forming limited to very large-radius bends. | 1,030 | 1,320 | 4 | 41 HRC | 2.3 % IACS |
What is S30441?
S30441 is a nitrogen-strengthened 18Cr-9Ni austenitic stainless that uses interstitial nitrogen to raise strength above standard 304 while keeping austenitic weldability and formability. Annealed material gives 390 MPa yield, 700 MPa tensile and 48 % elongation at 195 HB, allowing thinner walls in pressure parts; it is available annealed, cold drawn, in quarter- through full-hard tempers and as-welded. Maximum service temperature is 800 °C and corrosion resistance (score 60) is comparable to 304, so it is not suitable for chloride-rich service. Nitrogen loss in the arc slightly softens weld metal; use 316L or a Mo-bearing grade where pitting is the concern. S30441 has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 68% of stainless steel grades. It melts at 1,400°C (2,552 °F). S30441 has a yield strength of 390 MPa (56.6 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 54% of stainless steel grades. Elongation at break is 48% and the elastic modulus is 195 GPa (28.3 Msi).
What is S30441 used for?
- Pressure vessels and shells
- Structural members needing more strength than 304
- Cryogenic and process tank sections
- Piping and flanges for steam service
- Fasteners and shafts
- Formed sheet-metal frames and brackets
- Heat exchanger components
Advantages
- Tough — resists crack growth — 220 MPa·√m (200.2 ksi·√in), better than 97% of stainless steel grades
- Polishes to a fine finish — 80/100, better than 89% of stainless steel grades
- Ductile — tolerates forming and impact — 48%, better than 85% of stainless steel grades
- Readily welded — 80/100, better than 80% of stainless steel grades
S30441 properties
Typical room-temperature values for S30441-Annealed; bars are the position among stainless steel grades.
Physical3
S30441 has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 68% of stainless steel grades. It melts at 1,400°C (2,552 °F).
Mechanical16
S30441 has a yield strength of 390 MPa (56.6 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 54% of stainless steel grades. Elongation at break is 48% and the elastic modulus is 195 GPa (28.3 Msi).
Thermal6
S30441 is rated for continuous service to 800°C (1,472 °F). It conducts heat at 15.5 W/m·K (8.96 BTU/hr·ft·°F), better than 53% of stainless steel grades. Thermal expansion is 16.6 µm/m·K (9.22 µin/in·°F).
Electrical3
S30441 conducts electricity at 2.3 % IACS, better than 55% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (60/100), worse than 58% of stainless steel grades.
Sustainability4
Producing a kilogram of S30441 takes about 53 MJ of energy and emits 5.2 kg of CO₂ — less than 67% of stainless steel grades. Typical recycled content is 65%.
Manufacturability8
S30441's machinability is poor (33/100, worse than 57% of stainless steel grades); weldability very good (80/100); formability good (65/100).
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. S30441 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with S30441
Is S30441 easy to machine?
Gummy and strongly work-hardening — use rigid setups, positive-rake coated carbide, heavy feeds, low-to-moderate speeds and flood coolant; never dwell or rub.
Can S30441 be welded?
Readily welded by GTAW/GMAW/SMAW with 308H (or 308L for corrosive service) filler, no preheat, low interpass temperature and no PWHT; nitrogen loss in the arc slightly softens the weld metal.
Can S30441 be formed, bent or molded?
Cold forms well but with higher forming loads and springback than 304; anneal between severe draws and allow generous bend radii for hard tempers.
S30441 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 |
|---|---|---|
| Chigh-carbon (H) range for elevated-temperature strength | 0.04 – 0.1 | 0.07 |
| Mn | ≤ 2 | 1.5 |
| Si | ≤ 0.75 | 0.5 |
| P | ≤ 0.05 | |
| S | ≤ 0.03 | |
| Cr | 18 – 20 | 19 |
| Ni | 8 – 10.5 | 9 |
| Nprincipal solid-solution strengthener | 0.16 – 0.3 | 0.22 |
| Fe | balance |
What surface finishes work on S30441?
Pickle/passivate per ASTM A380/A967 after hot work or welding; takes 2B, BA, No.4 and mirror polish finishes well — electropolishing gives the best corrosion performance.
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 S30441 cost?
S30441 is a standard-cost stainless steel ($$), cheaper than about 71% 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.
S30441 — frequently asked
What is S30441 used for?
S30441 is typically used for pressure vessels and shells, structural members needing more strength than 304, cryogenic and process tank sections, piping and flanges for steam service, fasteners and shafts and formed sheet-metal frames and brackets. In short: stronger than standard 304; nitrogen-strengthened austenitic; 304-level corrosion resistance.
What is the yield strength of S30441?
S30441 has a typical yield strength of 390 MPa (56.6 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 54% of stainless steel grades. Strength varies by condition: see the 7 listed tempers.
Is S30441 easy to machine?
Not especially — machinability is rated poor (33/100, worse than 57% of stainless steel grades). Gummy and strongly work-hardening — use rigid setups, positive-rake coated carbide, heavy feeds, low-to-moderate speeds and flood coolant; never dwell or rub.
Can S30441 be welded?
Yes — weldability is rated very good (80/100). Readily welded by GTAW/GMAW/SMAW with 308H (or 308L for corrosive service) filler, no preheat, low interpass temperature and no PWHT; nitrogen loss in the arc slightly softens the weld metal.
What surface finishes work on S30441?
Pickle/passivate per ASTM A380/A967 after hot work or welding; takes 2B, BA, No.4 and mirror polish finishes well — electropolishing gives the best corrosion performance.
Can S30441 be formed, bent or molded?
Cold forms well but with higher forming loads and springback than 304; anneal between severe draws and allow generous bend radii for hard tempers.
What is the maximum service temperature of S30441?
S30441 is rated for continuous use to about 800°C (1,472 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between S30441 Annealed and S30441-FH?
Annealed is the default condition — standard stocked condition for plate, sheet, bar and tube; maximum ductility and corrosion resistance. FH: maximum as-rolled strength; forming limited to very large-radius bends. Yield strength is 390 MPa in Annealed versus 1,030 MPa in FH.
How much does S30441 cost?
S30441 is a standard-cost stainless steel ($$), cheaper than about 71% 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 A666 — Annealed or Cold-Worked Austenitic Stainless Steel Sheet, Strip, Plate and Flat Bar — ASTM International (2015)
- ASME BPVC Section II Part D — Properties (Metric) — ASME (2023)
- 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)
- SAE/ASTM Unified Numbering System for Metals and Alloys (UNS) — SAE International / ASTM (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.