Stainless Steel N08135
UNS N08135
A high-nickel, chromium-molybdenum austenitic alloy engineered for combined high-temperature strength and aqueous corrosion resistance, positioned between conventional stainless steels and nickel-base alloys.
Reference datasheet — N08135 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 SA condition
N08135 tempers and conditions
N08135 is supplied in 5 conditions, soft to hard. SA 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 + Solution Annealed | Heavy sections and forgings — same metallurgical state as SA but slightly coarser grain and lower strength. | 335 | 690 | 45 | 180 HB | 1.6 % IACS |
SADefault Solution Annealed | Standard supply condition for plate, tube and bar — maximum corrosion resistance and ductility. | 360 | 720 | 48 | 190 HB | — |
Cold Drawn + Solution Annealed | Precision tube and bar with tight tolerance and bright surface, fully softened for corrosion service. | 375 | 730 | 45 | 195 HB | 1.6 % IACS |
As-welded deposit | Properties of welded joints in fabricated equipment; post-weld solution annealing restores full corrosion resistance where possible. | 380 | 680 | 30 | 205 HB | 1.6 % IACS |
Cold worked | Choose when higher yield strength is required (e.g. downhole tubing, springs, fasteners); corrosion resistance slightly reduced and SCC sensitivity increases with strain. | 700 | 900 | 22 | 29 HRC | — |
What is N08135?
A high-nickel, chromium-molybdenum austenitic alloy engineered for combined high-temperature strength and aqueous corrosion resistance, positioned between conventional stainless steels and nickel-base alloys. N08135 has a density of 8 g/cm³ (0.289 lb/in³), heavier than 92% of stainless steel grades. It melts at 1,330°C (2,426 °F). N08135 has a yield strength of 360 MPa (52.2 ksi) and a tensile strength of 720 MPa (104 ksi) — weaker than 51% of stainless steel grades. Elongation at break is 48% and the elastic modulus is 195 GPa (28.3 Msi).
What is N08135 used for?
- high-temperature exhaust components
- boiler and superheater tubing
- furnace fixtures
- chemical process equipment exposed to elevated temperature
Advantages
- Good corrosion resistance — 86/100, better than 94% of stainless steel grades
- Ductile — tolerates forming and impact — 48%, better than 85% of stainless steel grades
Limitations
- Low electrical conductivity — 1.6 % IACS, worse than 99% of stainless steel grades
- Poor heat conductor — 11.5 W/m·K (6.64 BTU/hr·ft·°F), worse than 97% of stainless steel grades
- High embodied carbon — 7.5 kg CO₂/kg, worse than 97% of stainless steel grades
- Difficult to machine — 22/100, worse than 95% of stainless steel grades
N08135 properties
Typical room-temperature values for N08135-SA; bars are the position among stainless steel grades.
Physical3
N08135 has a density of 8 g/cm³ (0.289 lb/in³), heavier than 92% of stainless steel grades. It melts at 1,330°C (2,426 °F).
Mechanical14
N08135 has a yield strength of 360 MPa (52.2 ksi) and a tensile strength of 720 MPa (104 ksi) — weaker than 51% of stainless steel grades. Elongation at break is 48% and the elastic modulus is 195 GPa (28.3 Msi).
Thermal6
N08135 is rated for continuous service to 800°C (1,472 °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
N08135 conducts electricity at 1.6 % IACS, worse than 99% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is excellent (86/100), better than 94% of stainless steel grades.
Sustainability4
Producing a kilogram of N08135 takes about 90 MJ of energy and emits 7.5 kg of CO₂ — more than 94% of stainless steel grades. Typical recycled content is 35%.
Manufacturability7
N08135's machinability is poor (22/100, worse than 95% of stainless steel grades); weldability very good (70/100); formability good (55/100).
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. N08135 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with N08135
Is N08135 easy to machine?
Treat as a nickel alloy: rigid setup, sharp positive-rake carbide, low speed (15–25 m/min) with heavy positive feed to cut beneath the work-hardened layer, flood high-pressure emulsion.
Can N08135 be welded?
GTAW/GMAW or SMAW with overalloyed Ni-Cr-Mo filler (ERNiCrMo-3/-4 or -13); low heat input, interpass < 150 °C, no preheat, back-purge with Ar to protect the root.
Can N08135 be formed, bent or molded?
Cold forms well but needs 1.5–2× the force of 304 and generous springback allowance; hot working 1150–900 °C followed by solution anneal ~1150–1200 °C and rapid quench.
N08135 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 |
|---|---|---|
| Nihigh nickel content stabilises austenite and gives chloride-SCC resistance | 30 – 37 | 35 |
| Cr | 25 – 28 | 26.5 |
| Mo | 5.5 – 7 | 6.5 |
| Cu | 0 – 1 | 0.4 |
| Nsolid-solution strengthening + pitting resistance | 0.15 – 0.35 | 0.25 |
| Mn | 0 – 2 | 1 |
| Si | 0 – 0.6 | 0.3 |
| C | 0 – 0.03 | 0.02 |
| P | 0 – 0.03 | |
| S | 0 – 0.02 | |
| Febalance, approx. 28–33 % | balance |
What surface finishes work on N08135?
Pickle (HNO3-HF) or bead blast plus passivation after welding to restore the Cr-Mo passive film; electropolishing gives best pitting performance; not anodisable.
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 N08135 cost?
N08135 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.
N08135 — frequently asked
What is N08135 used for?
N08135 is typically used for high-temperature exhaust components, boiler and superheater tubing, furnace fixtures and chemical process equipment exposed to elevated temperature. In short: heat plus acid resistance; between stainless and nickel alloys; solution-annealed austenitic tubing grade.
What is the yield strength of N08135?
N08135 has a typical yield strength of 360 MPa (52.2 ksi) and a tensile strength of 720 MPa (104 ksi) — weaker than 51% of stainless steel grades. Strength varies by condition: see the 5 listed tempers.
Is N08135 easy to machine?
Not especially — machinability is rated poor (22/100, worse than 95% of stainless steel grades). Treat as a nickel alloy: rigid setup, sharp positive-rake carbide, low speed (15–25 m/min) with heavy positive feed to cut beneath the work-hardened layer, flood high-pressure emulsion.
Can N08135 be welded?
Yes — weldability is rated very good (70/100). GTAW/GMAW or SMAW with overalloyed Ni-Cr-Mo filler (ERNiCrMo-3/-4 or -13); low heat input, interpass < 150 °C, no preheat, back-purge with Ar to protect the root.
What surface finishes work on N08135?
Pickle (HNO3-HF) or bead blast plus passivation after welding to restore the Cr-Mo passive film; electropolishing gives best pitting performance; not anodisable.
Can N08135 be formed, bent or molded?
Cold forms well but needs 1.5–2× the force of 304 and generous springback allowance; hot working 1150–900 °C followed by solution anneal ~1150–1200 °C and rapid quench.
What is the maximum service temperature of N08135?
N08135 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 N08135-SA and N08135-CW?
SA is the default condition — standard supply condition for plate, tube and bar — maximum corrosion resistance and ductility. CW: choose when higher yield strength is required (e.g. downhole tubing, springs, fasteners); corrosion resistance slightly reduced and SCC sensitivity increases with strain. Yield strength is 360 MPa in SA versus 700 MPa in CW.
How much does N08135 cost?
N08135 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 B622 / B619 / B564 — Nickel and Nickel-Alloy Tube, Pipe and Forgings — ASTM International (2023)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- ASM Specialty Handbook — Heat-Resistant Materials / Nickel, Cobalt and Their Alloys — ASM International (2000)
- UNS — Metals & Alloys in the Unified Numbering System — 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.