Stainless Steel N08535
UNS N08535 · ASTM B366/B688
N08535 is a low-carbon iron-nickel-chromium-molybdenum superaustenitic stainless in the same family as 904L and Alloy 926, covered by ASTM B366/B688.
Reference datasheet — N08535 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
N08535 tempers and conditions
N08535 is supplied in 5 conditions, soft to hard. ANN 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 |
|---|---|---|---|---|---|---|
Hot Finished + Annealed | Choose for forged valve bodies, flanges and heavy bar where section size prevents cold work. | 255 | 575 | 42 | 155 HB | 1.7 % IACS |
ANNDefault Annealed | Standard supply condition for plate, sheet, pipe and fittings; maximum corrosion resistance and ductility. | 265 | 590 | 45 | 160 HB | 1.7 % IACS |
As-welded deposit | Property set for weld joints made without post-weld solution anneal; expect reduced pitting resistance in autogenous welds. | 300 | 590 | 32 | 180 HB | 1.7 % IACS |
Cold drawn | Pick for close-tolerance shafting, fasteners and instrument tubing needing higher yield strength. | 520 | 720 | 25 | 20 HRC | 1.7 % IACS |
1/4 Hard | Use where springback-tolerant sheet with elevated yield strength is needed, e.g. clamps and gaskets. | 580 | 790 | 18 | 22 HRC | 1.7 % IACS |
What is N08535?
N08535 is a low-carbon iron-nickel-chromium-molybdenum superaustenitic stainless in the same family as 904L and Alloy 926, covered by ASTM B366/B688. It is chosen for hot sulfuric, phosphoric and mixed-acid streams and is supplied as sheet, plate, tube and welded fittings in annealed, hot-finished-annealed, cold-drawn and cold-worked conditions; annealed properties are 265 MPa yield, 590 MPa tensile and 45% elongation. Machinability is low (score 28) and cold forming needs about 50% more force than 304. 904L (N08904) is the nearest and more widely available alternative. N08535 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). N08535 has a yield strength of 265 MPa (38.4 ksi) and a tensile strength of 590 MPa (85.6 ksi) — weaker than 81% of stainless steel grades. Elongation at break is 45% and the elastic modulus is 195 GPa (28.3 Msi).
What is N08535 used for?
- sulfuric acid process equipment
- phosphoric acid production
- pollution control scrubbers
- chemical process vessels
Advantages
- Good corrosion resistance — 80/100, better than 88% of stainless steel grades
- Tough — resists crack growth — 200 MPa·√m (182 ksi·√in), better than 86% of stainless steel grades
- Ductile — tolerates forming and impact — 45%, better than 76% of stainless steel grades
- Forms and bends easily — 68/100, better than 75% 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 kg CO₂/kg, worse than 88% of stainless steel grades
- Low strength — 265 MPa (38.4 ksi), worse than 81% of stainless steel grades
N08535 properties
Typical room-temperature values for N08535-ANN; bars are the position among stainless steel grades.
Physical3
N08535 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).
Mechanical15
N08535 has a yield strength of 265 MPa (38.4 ksi) and a tensile strength of 590 MPa (85.6 ksi) — weaker than 81% of stainless steel grades. Elongation at break is 45% and the elastic modulus is 195 GPa (28.3 Msi).
Thermal6
N08535 is rated for continuous service to 550°C (1,022 °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 15 µm/m·K (8.33 µin/in·°F).
Electrical3
N08535 conducts electricity at 1.7 % IACS, worse than 93% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is very good (80/100), better than 88% of stainless steel grades.
Sustainability4
Producing a kilogram of N08535 takes about 78 MJ of energy and emits 6 kg of CO₂ — more than 87% of stainless steel grades. Typical recycled content is 45%.
Manufacturability8
N08535's machinability is poor (28/100, worse than 79% of stainless steel grades); weldability very good (72/100); formability good (68/100).
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. N08535 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with N08535
Is N08535 easy to machine?
Machine like Alloy 28/904L: rigid setups, positive-rake carbide, 15–25 m/min turning speeds, heavy constant feed and flood coolant to beat rapid work hardening.
Can N08535 be welded?
GTAW/GMAW with over-alloyed Ni-base filler (ERNiCrMo-3/-4) to avoid Mo segregation in the weld; low heat input, interpass < 100 °C, no preheat or PWHT, back-purge with argon.
Can N08535 be formed, bent or molded?
Cold forms well but needs roughly 50 % more force than 304 and generous bend radii; hot work 1100–1180 °C followed by solution anneal ~1120–1180 °C and rapid water quench.
N08535 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 superaustenitic; verify limit against the governing product spec | ≤ 0.03 | 0.02 |
| Si | ≤ 1 | 0.4 |
| Mn | ≤ 2 | 1 |
| P | ≤ 0.03 | 0.02 |
| S | ≤ 0.03 | 0 |
| Crrange per UNS listing for this Fe-Ni-Cr-Mo grade | 24 – 27 | 25.5 |
| Nihigh Ni gives chloride SCC immunity | 29 – 36.5 | 32 |
| Mo | 2.5 – 4 | 3.2 |
| Cuimproves sulfuric/phosphoric acid resistance | 0.6 – 1.6 | 1 |
| Fe | balance |
What surface finishes work on N08535?
Pickle and passivate (HNO₃-HF) or electropolish after welding to restore the Cr-Mo passive film; heat tint must be fully removed for acid service.
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 N08535 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- ASTM
- B366/B688
How much does N08535 cost?
N08535 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.
N08535 — frequently asked
What is N08535 used for?
N08535 is typically used for sulfuric acid process equipment, phosphoric acid production, pollution control scrubbers and chemical process vessels. In short: hot sulfuric acid resistance; 904L-class superaustenitic; low machinability, good formability.
What is the yield strength of N08535?
N08535 has a typical yield strength of 265 MPa (38.4 ksi) and a tensile strength of 590 MPa (85.6 ksi) — weaker than 81% of stainless steel grades. Strength varies by condition: see the 5 listed tempers.
Is N08535 easy to machine?
Not especially — machinability is rated poor (28/100, worse than 79% of stainless steel grades). Machine like Alloy 28/904L: rigid setups, positive-rake carbide, 15–25 m/min turning speeds, heavy constant feed and flood coolant to beat rapid work hardening.
Can N08535 be welded?
Yes — weldability is rated very good (72/100). GTAW/GMAW with over-alloyed Ni-base filler (ERNiCrMo-3/-4) to avoid Mo segregation in the weld; low heat input, interpass < 100 °C, no preheat or PWHT, back-purge with argon.
What surface finishes work on N08535?
Pickle and passivate (HNO₃-HF) or electropolish after welding to restore the Cr-Mo passive film; heat tint must be fully removed for acid service.
Can N08535 be formed, bent or molded?
Cold forms well but needs roughly 50 % more force than 304 and generous bend radii; hot work 1100–1180 °C followed by solution anneal ~1120–1180 °C and rapid water quench.
What is the maximum service temperature of N08535?
N08535 is rated for continuous use to about 550°C (1,022 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between N08535-ANN and N08535-CD?
ANN is the default condition — standard supply condition for plate, sheet, pipe and fittings; maximum corrosion resistance and ductility. CD: pick for close-tolerance shafting, fasteners and instrument tubing needing higher yield strength. Yield strength is 265 MPa in ANN versus 520 MPa in CD.
How much does N08535 cost?
N08535 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 B366 — Factory-Made Wrought Nickel and Nickel Alloy Fittings — ASTM International (2023)
- ASTM B688 — Cr-Ni-Mo-Fe Plate, Sheet and Strip — ASTM International (2019)
- ASM Handbook Vol. 13B — Corrosion: Materials — ASM International (2005)
- ASM Specialty Handbook: Stainless Steels (superaustenitic section) — ASM International (1994)
- Superaustenitic Fe-Ni-Cr-Mo acid-service alloy datasheets (904L / Alloy 28 / Alloy 926 class) — Various mills (2023)
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.