Stainless Steel Alloy 926
UNS N08926 · ASTM A240/B625 · EN 1.4529, X1NiCrMoCuN25-20-7 · also Cronifer 1925hMo
A high-Mo (6.5%), nitrogen-alloyed superaustenitic stainless offering pitting/crevice resistance approaching some nickel alloys, used as an upgrade from 904L for very aggressive chloride and acid service.
Reference datasheet — Alloy 926 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
Alloy 926 tempers and conditions
Alloy 926 is supplied in 3 conditions, soft to hard. SA is the default FabDigit quotes; the values on this page are for it.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
SADefault Solution annealed | Standard supply condition for plate, sheet, tube, pipe and fittings — maximum corrosion resistance and ductility; use unless cold-worked strength is needed. | 360 | 700 | 45 | 180 HB | — |
Cold drawn | Choose for shafts, fasteners, pump/valve trim and instrument tubing needing higher yield strength and tight tolerance; slightly reduced ductility. | 620 | 850 | 25 | 26 HRC | — |
Heavily cold worked | Springs, screens, wire cloth and fasteners for aggressive chloride media where high strength plus 6Mo corrosion resistance is required. | 1,000 | 1,250 | 8 | 38 HRC | 1.7 % IACS |
Supply forms, finishes and certifications
Ways Alloy 926 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
CRA-2B | CRA 2B | Surface finish |
HRAP | Hot rolled, solution annealed and pickled plate | Surface finish |
What is Alloy 926?
A high-Mo (6.5%), nitrogen-alloyed superaustenitic stainless offering pitting/crevice resistance approaching some nickel alloys, used as an upgrade from 904L for very aggressive chloride and acid service. Alloy 926 has a density of 8.1 g/cm³ (0.293 lb/in³), heavier than 99% of stainless steel grades. It melts at 1,320°C (2,408 °F). Alloy 926 has a yield strength of 360 MPa (52.2 ksi) and a tensile strength of 700 MPa (102 ksi) — weaker than 51% of stainless steel grades. Elongation at break is 45% and the elastic modulus is 195 GPa (28.3 Msi).
What is Alloy 926 used for?
- FGD scrubber systems
- seawater and offshore equipment
- pulp/paper bleach plants
- sour gas and chemical processing
Advantages
- Good corrosion resistance — 86/100, better than 94% of stainless steel grades
- Polishes to a fine finish — 80/100, better than 89% of stainless steel grades
- Tough — resists crack growth — 200 MPa·√m (182 ksi·√in), better than 86% 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 — 6.5 kg CO₂/kg, worse than 93% of stainless steel grades
- Difficult to machine — 25/100, worse than 88% of stainless steel grades
- Limited service temperature — 400°C (752 °F), worse than 78% of stainless steel grades
Alloy 926 properties
Typical room-temperature values for Alloy 926-SA; bars are the position among stainless steel grades.
Physical3
Alloy 926 has a density of 8.1 g/cm³ (0.293 lb/in³), heavier than 99% of stainless steel grades. It melts at 1,320°C (2,408 °F).
Mechanical15
Alloy 926 has a yield strength of 360 MPa (52.2 ksi) and a tensile strength of 700 MPa (102 ksi) — weaker than 51% of stainless steel grades. Elongation at break is 45% and the elastic modulus is 195 GPa (28.3 Msi).
Thermal5
Alloy 926 is rated for continuous service to 400°C (752 °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 15.8 µm/m·K (8.78 µin/in·°F).
Electrical3
Alloy 926 conducts electricity at 1.7 % IACS, worse than 93% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is excellent (86/100), better than 94% of stainless steel grades.
Sustainability4
Producing a kilogram of Alloy 926 takes about 95 MJ of energy and emits 6.5 kg of CO₂ — more than 96% of stainless steel grades. Typical recycled content is 40%.
Manufacturability7
Alloy 926's machinability is poor (25/100, worse than 88% of stainless steel grades); weldability very good (75/100); 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. Alloy 926 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with Alloy 926
Is Alloy 926 easy to machine?
Gummy and highly work-hardening: use rigid setups, sharp positive-rake carbide, 25–40 % of 316L cutting speeds, heavy feeds to stay under the hardened skin, and flood high-lubricity coolant.
Can Alloy 926 be welded?
GTAW/GMAW/SMAW with over-alloyed Ni-base filler (ERNiCrMo-3/-4, ERNiCrMo-13) to prevent Mo segregation in the weld; no preheat, keep interpass below ~150 °C, low heat input, argon backing, no post-weld heat treatment.
Can Alloy 926 be formed, bent or molded?
Cold forms well but needs roughly twice the press force of 316L and generous springback allowance; hot work 1150–1200 °C with immediate solution anneal at 1100–1180 °C and rapid quench.
Alloy 926 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 for as-welded corrosion resistance | ≤ 0.02 | 0.01 |
| Si | ≤ 0.5 | 0.3 |
| Mn | ≤ 2 | 1 |
| P | ≤ 0.03 | |
| S | ≤ 0.01 | |
| Cr | 19 – 21 | 20 |
| Niaustenite stability, SCC resistance | 24 – 26 | 25 |
| Mopitting/crevice resistance | 6 – 7 | 6.5 |
| Cuimproves sulphuric/phosphoric acid resistance | 0.5 – 1.5 | 1 |
| Nraises yield strength and PREN | 0.15 – 0.25 | 0.2 |
| Feremainder, ≈ 46 % | balance |
What surface finishes work on Alloy 926?
Pickle (HNO3-HF) and passivate per ASTM A967 after welding or heat tint to restore full pitting resistance; polishes to a bright finish; not anodised, and iron contamination from carbon-steel tooling must be avoided.
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 Alloy 926 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- N08926
- ASTM
- A240/B625
- EN / DIN / Werkstoff-Nr.
- 1.4529X1NiCrMoCuN25-20-7
- Trade names
- Cronifer 1925hMo
How much does Alloy 926 cost?
Alloy 926 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.
Alloy 926 — frequently asked
What is Alloy 926 used for?
Alloy 926 is typically used for FGD scrubber systems, seawater and offshore equipment, pulp/paper bleach plants and sour gas and chemical processing. In short: 6.5 % Mo superaustenitic; upgrade from 904L; near nickel-alloy corrosion resistance.
What is the yield strength of Alloy 926?
Alloy 926 has a typical yield strength of 360 MPa (52.2 ksi) and a tensile strength of 700 MPa (102 ksi) — weaker than 51% of stainless steel grades. Strength varies by condition: see the 3 listed tempers.
Is Alloy 926 easy to machine?
Not especially — machinability is rated poor (25/100, worse than 88% of stainless steel grades). Gummy and highly work-hardening: use rigid setups, sharp positive-rake carbide, 25–40 % of 316L cutting speeds, heavy feeds to stay under the hardened skin, and flood high-lubricity coolant.
Can Alloy 926 be welded?
Yes — weldability is rated very good (75/100). GTAW/GMAW/SMAW with over-alloyed Ni-base filler (ERNiCrMo-3/-4, ERNiCrMo-13) to prevent Mo segregation in the weld; no preheat, keep interpass below ~150 °C, low heat input, argon backing, no post-weld heat treatment.
What surface finishes work on Alloy 926?
Pickle (HNO3-HF) and passivate per ASTM A967 after welding or heat tint to restore full pitting resistance; polishes to a bright finish; not anodised, and iron contamination from carbon-steel tooling must be avoided.
Can Alloy 926 be formed, bent or molded?
Cold forms well but needs roughly twice the press force of 316L and generous springback allowance; hot work 1150–1200 °C with immediate solution anneal at 1100–1180 °C and rapid quench.
What is the maximum service temperature of Alloy 926?
Alloy 926 is rated for continuous use to about 400°C (752 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between Alloy 926-SA and Alloy 926 CW-HT?
SA is the default condition — standard supply condition for plate, sheet, tube, pipe and fittings — maximum corrosion resistance and ductility; use unless cold-worked strength is needed. CW-HT: springs, screens, wire cloth and fasteners for aggressive chloride media where high strength plus 6Mo corrosion resistance is required. Yield strength is 360 MPa in SA versus 1,000 MPa in CW-HT.
How much does Alloy 926 cost?
Alloy 926 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 B625 — UNS N08926 and Related Alloys Plate, Sheet and Strip — ASTM International (2022)
- ASTM B649 / B676 / B677 — N08926 bar, tube and pipe — ASTM International (2022)
- EN 10088-1/-2 — Stainless steels, grade 1.4529 X1NiCrMoCuN25-20-7 — CEN (2014)
- Cronifer 1925 hMo / Alloy 926 (N08926) alloy data sheet — VDM Metals / ThyssenKrupp VDM (2020)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
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.