Stainless Steel S35140
UNS S35140
S35140 is a high-nickel-chromium superaustenitic stainless alloy intended for elevated-temperature service requiring resistance to oxidation and carburization, in the same family as the Alloy 803/864 grades.
Reference datasheet — S35140 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
S35140 tempers and conditions
S35140 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 solution/mill annealed sheet, strip and plate | Standard stocked condition: maximum ductility for bellows/flex-hose forming, tube bending and welded fabrication. | 275 | 620 | 45 | 170 HB | — |
As-welded deposit | Property basis for welded bellows and tubing joints; no post-weld heat treatment normally required. | 300 | 590 | 30 | 185 HB | 1.7 % IACS |
Cold Rolled 1/4 Hard | Light cold work for slightly higher yield strength in formed strip parts and lightly stressed clamps. | 520 | 760 | 25 | 17 HRC | 1.7 % IACS |
Cold drawn | Cold drawn bar/tube for close tolerances and higher machined-part strength; anneal before severe bending. | 550 | 760 | 22 | 22 HRC | 1.7 % IACS |
Cold Rolled 1/2 Hard | Use where springback and higher yield strength are wanted in thin strip; forming severity must be reduced. | 690 | 900 | 12 | 27 HRC | 1.7 % IACS |
Supply forms, finishes and certifications
Ways S35140 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
HRAP | Hot Rolled, Annealed and Pickled | Surface finish |
What is S35140?
S35140 is a high-nickel-chromium superaustenitic stainless alloy intended for elevated-temperature service requiring resistance to oxidation and carburization, in the same family as the Alloy 803/864 grades. Annealed properties are 275 MPa yield, 620 MPa tensile, 45 % elongation and 170 HB, with service to about 1000 °C; product forms include annealed and hot-rolled annealed pickled sheet and plate, quarter- and half-hard cold-rolled strip, cold-drawn bar and as-welded tube. Machinability is low (score 30) and stock availability is limited. Alloy 864 is the nearest alternative for the same duty at a lower temperature ceiling. S35140 has a density of 8 g/cm³ (0.289 lb/in³), heavier than 92% of stainless steel grades. It melts at 1,350°C (2,462 °F). S35140 has a yield strength of 275 MPa (39.9 ksi) and a tensile strength of 620 MPa (89.9 ksi) — weaker than 77% of stainless steel grades. Elongation at break is 45% and the elastic modulus is 196 GPa (28.4 Msi).
What is S35140 used for?
- high-temperature furnace components
- process heater internals
- specialty thermal equipment
Advantages
- High service temperature — 1,000°C (1,832 °F), better than 88% of stainless steel grades
- Good corrosion resistance — 78/100, better than 84% of stainless steel grades
- Forms and bends easily — 70/100, better than 79% of stainless steel grades
- Ductile — tolerates forming and impact — 45%, better than 76% of stainless steel grades
Limitations
- Poor heat conductor — 11.5 W/m·K (6.64 BTU/hr·ft·°F), worse than 97% of stainless steel grades
- Low electrical conductivity — 1.7 % IACS, worse than 93% of stainless steel grades
- High embodied carbon — 6.2 kg CO₂/kg, worse than 90% of stainless steel grades
- Low strength — 275 MPa (39.9 ksi), worse than 77% of stainless steel grades
S35140 properties
Typical room-temperature values for S35140-Annealed; bars are the position among stainless steel grades.
Physical3
S35140 has a density of 8 g/cm³ (0.289 lb/in³), heavier than 92% of stainless steel grades. It melts at 1,350°C (2,462 °F).
Mechanical13
S35140 has a yield strength of 275 MPa (39.9 ksi) and a tensile strength of 620 MPa (89.9 ksi) — weaker than 77% of stainless steel grades. Elongation at break is 45% and the elastic modulus is 196 GPa (28.4 Msi).
Thermal5
S35140 is rated for continuous service to 1,000°C (1,832 °F). It conducts heat at 11.5 W/m·K (6.64 BTU/hr·ft·°F), worse than 97% of stainless steel grades. Thermal expansion is 14.5 µm/m·K (8.06 µin/in·°F).
Electrical3
S35140 conducts electricity at 1.7 % IACS, worse than 93% of stainless steel grades.
Chemical & Environmental2
Corrosion resistance is very good (78/100), better than 84% of stainless steel grades.
Sustainability4
Producing a kilogram of S35140 takes about 75 MJ of energy and emits 6.2 kg of CO₂ — more than 84% of stainless steel grades. Typical recycled content is 40%.
Manufacturability7
S35140's machinability is poor (30/100, worse than 70% of stainless steel grades); weldability very good (72/100); formability very good (70/100).
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. S35140 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with S35140
Is S35140 easy to machine?
Treat as a high-nickel austenitic: rigid setups, positive-rake sharp carbide, low speed / heavy positive feed, flood coolant and no dwelling to avoid rapid work hardening.
Can S35140 be welded?
Readily welded by GTAW/GMAW/plasma with Ni-Cr-Mo filler (ERNiCrMo-3 type) or matching wire; keep interpass temperature low, no preheat and normally no post-weld heat treatment.
Can S35140 be formed, bent or molded?
Good cold formability for bellows, convoluted hose and deep-drawn parts, but the work-hardening rate is high — allow extra press tonnage and interstage anneal at ~1050–1120 °C with rapid cooling.
S35140 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 carbon, Ti-stabilized | ≤ 0.05 | 0.02 |
| Cr | 20 – 22 | 21 |
| Ni | 33 – 36 | 34.5 |
| Mo | 3.5 – 4.5 | 4 |
| Tistabilizer | 0.15 – 0.6 | 0.35 |
| Mn | ≤ 1 | 0.5 |
| Si | ≤ 1 | 0.4 |
| P | ≤ 0.03 | |
| S | ≤ 0.02 | |
| Febalance ≈ 37–40% | balance |
What surface finishes work on S35140?
Pickle/passivate or electropolish after hot work; the alloy takes a bright polished or brushed finish. Anodizing is not applicable.
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 S35140 cost?
S35140 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.
S35140 — frequently asked
What is S35140 used for?
S35140 is typically used for high-temperature furnace components, process heater internals and specialty thermal equipment. In short: 1000 °C oxidation resistance; bellows-capable high-nickel grade; limited stock availability.
What is the yield strength of S35140?
S35140 has a typical yield strength of 275 MPa (39.9 ksi) and a tensile strength of 620 MPa (89.9 ksi) — weaker than 77% of stainless steel grades. Strength varies by condition: see the 5 listed tempers.
Is S35140 easy to machine?
Not especially — machinability is rated poor (30/100, worse than 70% of stainless steel grades). Treat as a high-nickel austenitic: rigid setups, positive-rake sharp carbide, low speed / heavy positive feed, flood coolant and no dwelling to avoid rapid work hardening.
Can S35140 be welded?
Yes — weldability is rated very good (72/100). Readily welded by GTAW/GMAW/plasma with Ni-Cr-Mo filler (ERNiCrMo-3 type) or matching wire; keep interpass temperature low, no preheat and normally no post-weld heat treatment.
What surface finishes work on S35140?
Pickle/passivate or electropolish after hot work; the alloy takes a bright polished or brushed finish. Anodizing is not applicable.
Can S35140 be formed, bent or molded?
Good cold formability for bellows, convoluted hose and deep-drawn parts, but the work-hardening rate is high — allow extra press tonnage and interstage anneal at ~1050–1120 °C with rapid cooling.
What is the maximum service temperature of S35140?
S35140 is rated for continuous use to about 1,000°C (1,832 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between S35140 Annealed and S35140-CD?
Annealed is the default condition — standard stocked condition: maximum ductility for bellows/flex-hose forming, tube bending and welded fabrication. CD: cold drawn bar/tube for close tolerances and higher machined-part strength; anneal before severe bending. Yield strength is 275 MPa in Annealed versus 550 MPa in CD.
How much does S35140 cost?
S35140 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/A480 — chromium-nickel stainless plate, sheet and strip (general requirements) — ASTM International (2023)
- SAE J1086 / ASTM DS-56 — Metals & Alloys in the Unified Numbering System (UNS) — SAE / ASTM (2017)
- Fe-35Ni-21Cr-4Mo Ti-stabilized heat- and corrosion-resistant alloy (Alloy 864 class) data sheet — specialty alloy producer (2020)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- ASM Specialty Handbook — Heat-Resistant Materials — ASM International (1997)
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.