Stainless Steel 1.4501
EN 1.4501 · UNS S32760 · ASTM A240 S32760 · also Zeron 100
EN 1.4501 (S32760, X2CrNiMoCuWN25-7-4, Zeron 100, F55) is a 25Cr super duplex stainless alloyed with tungsten and copper for high pitting and crevice corrosion resistance (score 88) in seawater and produced chloride environments.
Reference datasheet — 1.4501 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
1.4501 tempers and conditions
1.4501 is supplied in 4 conditions, soft to hard. SA is the default FabDigit quotes; the values on this page are for it.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
cast equivalent CD3MWCuN, solution treated (ASTM A995/A890 Gr 5A) | Cast counterpart used for seawater pump casings and valve bodies; lower ductility and strength than wrought, requires full solution treatment and quench. | 520 | 760 | 28 | 23 HRC | 2 % IACS |
SADefault Solution annealed and water quenched | Standard stocked condition for plate, sheet and welded fabrication; solution treated ~1100 °C and rapidly quenched for optimum phase balance and corrosion resistance. | 580 | 800 | 30 | 25 HRC | 2 % IACS |
Solution annealed forging | Choose for valve bodies, flanges and subsea forgings requiring qualified ferrite content and -46 °C impact testing. | 600 | 820 | 28 | 26 HRC | 2 % IACS |
Cold drawn | Use where higher yield strength, closer tolerance and better surface are needed on small-diameter bar; ductility and impact energy are reduced. | 780 | 950 | 20 | 32 HRC | 2 % IACS |
Supply forms, finishes and certifications
Ways 1.4501 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
CW-STRIP | CW | Supply form |
SA-BAR | Solution annealed hot-rolled/hot-finished bar | Supply form |
SMLS | SMLS/WLD Pipe | Supply form |
What is 1.4501?
EN 1.4501 (S32760, X2CrNiMoCuWN25-7-4, Zeron 100, F55) is a 25Cr super duplex stainless alloyed with tungsten and copper for high pitting and crevice corrosion resistance (score 88) in seawater and produced chloride environments. It is specified for offshore and subsea duty at 580 MPa yield, 800 MPa tensile, 30% elongation and 260 HB / 25 HRC, and is available as solution-annealed plate and bar, F55 forgings, seamless pipe, cold-drawn bar, cold-worked strip and 5A castings. Cost and lead time are higher than 2205, machining is slow, and welding requires ferrite control in the 35–55% range; 1.4507 is the nearest copper-bearing alternative and 1.4462 where a lower PREN is acceptable. 1.4501 has a density of 7.84 g/cm³ (0.283 lb/in³), heavier than 58% of stainless steel grades. It melts at 1,310°C (2,390 °F). 1.4501 has a yield strength of 580 MPa (84.1 ksi) and a tensile strength of 800 MPa (116 ksi) — stronger than 86% of stainless steel grades. Elongation at break is 30% and the elastic modulus is 190 GPa (27.6 Msi).
What is 1.4501 used for?
- subsea equipment
- offshore platforms
- seawater cooling systems
- valves and pumps
Advantages
- Good corrosion resistance — 88/100, better than 97% of stainless steel grades
- High strength — 580 MPa (84.1 ksi), better than 86% of stainless steel grades
Limitations
- Limited service temperature — 280°C (536 °F), worse than 96% of stainless steel grades
- Difficult to machine — 22/100, worse than 95% of stainless steel grades
- Low electrical conductivity — 2 % IACS, worse than 77% of stainless steel grades
1.4501 properties
Typical room-temperature values for 1.4501-SA; bars are the position among stainless steel grades.
Physical3
1.4501 has a density of 7.84 g/cm³ (0.283 lb/in³), heavier than 58% of stainless steel grades. It melts at 1,310°C (2,390 °F).
Mechanical17
1.4501 has a yield strength of 580 MPa (84.1 ksi) and a tensile strength of 800 MPa (116 ksi) — stronger than 86% of stainless steel grades. Elongation at break is 30% and the elastic modulus is 190 GPa (27.6 Msi).
Thermal6
1.4501 is rated for continuous service to 280°C (536 °F). It conducts heat at 14.2 W/m·K (8.2 BTU/hr·ft·°F), worse than 76% of stainless steel grades. Thermal expansion is 12.8 µm/m·K (7.11 µin/in·°F).
Electrical3
1.4501 conducts electricity at 2 % IACS, worse than 77% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is excellent (88/100), better than 97% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4501 takes about 58 MJ of energy and emits 5 kg of CO₂ — more than 66% of stainless steel grades. Typical recycled content is 60%.
Manufacturability7
1.4501's machinability is poor (22/100, worse than 95% of stainless steel grades); weldability good (60/100); formability fair (45/100).
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. 1.4501 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1.4501
Is 1.4501 easy to machine?
Machine like a super duplex: rigid setup, sharp coated carbide, low speed and heavy positive feed to cut under the work-hardened layer, with flood coolant.
Can 1.4501 be welded?
Weldable by GTAW/GMAW/SMAW with matched 25.10.4.L (Zeron 100X) or Ni-base filler; keep interpass ≤150 °C, heat input ~0.5–1.5 kJ/mm and Ar+N₂ backing to hold ferrite 35–55%.
Can 1.4501 be formed, bent or molded?
Hot work 1000–1150 °C followed by full solution anneal ~1100 °C and water quench; cold forming is possible but needs ~2× the force of 316L with large springback.
1.4501 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 |
|---|---|---|
| C | ≤ 0.03 | 0.02 |
| Si | ≤ 1 | 0.4 |
| Mn | ≤ 1 | 0.6 |
| P | ≤ 0.03 | 0.02 |
| S | ≤ 0.01 | 0 |
| Cr | 24 – 26 | 25 |
| Ni | 6 – 8 | 7 |
| Mo | 3 – 4 | 3.6 |
| Cu | 0.5 – 1 | 0.7 |
| W | 0.5 – 1 | 0.7 |
| N | 0.2 – 0.3 | 0.25 |
| FePREN = Cr + 3.3(Mo + 0.5W) + 16N ≥ 40; ASTM A240 additionally requires Cr + 3.3Mo + 16N ≥ 40 | balance | — |
What surface finishes work on 1.4501?
Pickle and passivate after hot work or welding to remove heat tint; no anodizing — mechanical polishing or electropolishing gives the best seawater 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
Equivalent designations
Standards and trade names that resolve to Stainless Steel 1.4501 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- S32760
- ASTM
- A240 S32760
- EN / DIN / Werkstoff-Nr.
- X2CrNiMoCuWN25-7-4
- Trade names
- Zeron 100
- Also called
- Zeron100
How much does 1.4501 cost?
1.4501 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.
1.4501 — frequently asked
What is 1.4501 used for?
1.4501 is typically used for subsea equipment, offshore platforms, seawater cooling systems and valves and pumps. In short: tungsten-alloyed super duplex; seawater-grade corrosion resistance; offshore F55 standard.
What is the yield strength of 1.4501?
1.4501 has a typical yield strength of 580 MPa (84.1 ksi) and a tensile strength of 800 MPa (116 ksi) — stronger than 86% of stainless steel grades. Strength varies by condition: see the 4 listed tempers.
Is 1.4501 easy to machine?
Not especially — machinability is rated poor (22/100, worse than 95% of stainless steel grades). Machine like a super duplex: rigid setup, sharp coated carbide, low speed and heavy positive feed to cut under the work-hardened layer, with flood coolant.
Can 1.4501 be welded?
Yes — weldability is rated good (60/100). Weldable by GTAW/GMAW/SMAW with matched 25.10.4.L (Zeron 100X) or Ni-base filler; keep interpass ≤150 °C, heat input ~0.5–1.5 kJ/mm and Ar+N₂ backing to hold ferrite 35–55%.
What surface finishes work on 1.4501?
Pickle and passivate after hot work or welding to remove heat tint; no anodizing — mechanical polishing or electropolishing gives the best seawater performance.
Can 1.4501 be formed, bent or molded?
Hot work 1000–1150 °C followed by full solution anneal ~1100 °C and water quench; cold forming is possible but needs ~2× the force of 316L with large springback.
What is the maximum service temperature of 1.4501?
1.4501 is rated for continuous use to about 280°C (536 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 1.4501-SA and 1.4501-CD?
SA is the default condition — standard stocked condition for plate, sheet and welded fabrication; solution treated ~1100 °C and rapidly quenched for optimum phase balance and corrosion resistance. CD: use where higher yield strength, closer tolerance and better surface are needed on small-diameter bar; ductility and impact energy are reduced. Yield strength is 580 MPa in SA versus 780 MPa in CD.
How much does 1.4501 cost?
1.4501 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 A182/A182M — Forged or Rolled Alloy Pipe Flanges and Fittings (F55) — ASTM International (2022)
- ASTM A790/A790M — Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe — ASTM International (2023)
- ASTM A995/A995M — Castings, Austenitic-Ferritic (Duplex) Stainless Steel (Gr 5A, CD3MWCuN) — ASTM International (2020)
- EN 10088-2/-3 — Stainless steels, technical delivery conditions (1.4501) — CEN (2014)
- Zeron 100 super duplex stainless steel data sheet — Rolled Alloys / Sandvik / Langley Alloys (2022)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- NORSOK M-630 MDS D54/D57 — 25Cr duplex material data sheets — Standards Norway (2013)
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.