Stainless Steel 1.4515
EN 1.4515 · UNS J93373 · ASTM CD4MCuN
1.4515 (GX3CrNiMoCuN26-6-3, CD4MCuN, J93373) is a copper-alloyed 26Cr-6Ni-3Mo cast duplex stainless steel, the nitrogen-bearing development of CD4MCu with a balanced ferrite/austenite structure.
Reference datasheet — 1.4515 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 ST condition
1.4515 tempers and conditions
1.4515 is supplied in 4 conditions, soft to hard. ST 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 |
|---|---|---|---|---|---|---|
Spheroidize annealed | Only an intermediate stage before solution annealing — as-cast material has intermetallic/nitride precipitation, low toughness and degraded corrosion resistance, and is not supplied for service. | 500 | 700 | 10 | 25 HRC | 2.2 % IACS |
As-welded deposit | Condition of production weld repairs made with matching 25Cr duplex filler when a full re-solution treatment is not practical; expect reduced toughness and local corrosion performance. | 520 | 720 | 18 | 23 HRC | 2.2 % IACS |
STDefault Solution annealed | The standard delivery condition for all pressure-retaining and corrosion service; restores the ferrite/austenite balance and dissolves intermetallics. | 540 | 740 | 25 | 22 HRC | — |
Hot isostatically pressed then solution annealed and quenched | Choose for thick-wall pump/valve castings where internal porosity must be eliminated for radiographic acceptance and higher ductility/toughness. | 555 | 770 | 30 | 22 HRC | 2.2 % IACS |
What is 1.4515?
1.4515 (GX3CrNiMoCuN26-6-3, CD4MCuN, J93373) is a copper-alloyed 26Cr-6Ni-3Mo cast duplex stainless steel, the nitrogen-bearing development of CD4MCu with a balanced ferrite/austenite structure. It is specified for high strength — 540 MPa yield, 740 MPa tensile, 25% elongation and 235 HB (22 HRC) after solution treatment — combined with resistance to sulfuric acid and seawater erosion-corrosion, and is supplied as sand and investment castings in ST, ST+HIP, as-cast and as-welded conditions. Service is limited to 280 °C by duplex phase embrittlement and corrosion score is 78. The nearest alternative is 1.4517 (A890 Grade 1B). 1.4515 has a density of 7.75 g/cm³ (0.28 lb/in³), lighter than 65% of stainless steel grades. It melts at 1,400°C (2,552 °F). 1.4515 has a yield strength of 540 MPa (78.3 ksi) and a tensile strength of 740 MPa (107 ksi) — stronger than 82% of stainless steel grades. Elongation at break is 25% and the elastic modulus is 200 GPa (29 Msi).
What is 1.4515 used for?
- pump impellers
- valve trim
- seawater handling equipment
- desalination components
Advantages
- Good corrosion resistance — 78/100, better than 84% of stainless steel grades
- High strength — 540 MPa (78.3 ksi), better than 82% of stainless steel grades
Limitations
- Limited service temperature — 280°C (536 °F), worse than 96% of stainless steel grades
- Limited formability — 20/100, worse than 86% of stainless steel grades
- Low fracture toughness — 90 MPa·√m (81.9 ksi·√in), worse than 75% of stainless steel grades
1.4515 properties
Typical room-temperature values for 1.4515-ST; bars are the position among stainless steel grades.
Physical3
1.4515 has a density of 7.75 g/cm³ (0.28 lb/in³), lighter than 65% of stainless steel grades. It melts at 1,400°C (2,552 °F).
Mechanical17
1.4515 has a yield strength of 540 MPa (78.3 ksi) and a tensile strength of 740 MPa (107 ksi) — stronger than 82% of stainless steel grades. Elongation at break is 25% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
1.4515 is rated for continuous service to 280°C (536 °F). It conducts heat at 16 W/m·K (9.24 BTU/hr·ft·°F), better than 58% of stainless steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
1.4515 conducts electricity at 2.2 % IACS, worse than 61% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is very good (78/100), better than 84% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4515 takes about 53 MJ of energy and emits 5 kg of CO₂ — less than 67% of stainless steel grades. Typical recycled content is 80%.
Manufacturability8
1.4515's machinability is poor (28/100, worse than 79% of stainless steel grades); weldability good (60/100); formability poor (20/100).
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. 1.4515 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1.4515
Is 1.4515 easy to machine?
Machine like a 25Cr duplex: rigid setups, positive-rake coated carbide, ~40–70 m/min cutting speed, heavy feeds to cut under the work-hardened layer and copious flood coolant.
Can 1.4515 be welded?
Weldable with matching 25Cr-Cu duplex (or ER2594/E2553) filler; control heat input and interpass ≤150 °C to keep 35–55 % ferrite, avoid autogenous welds, and re-solution anneal + water quench where full corrosion performance is required.
Can 1.4515 be formed, bent or molded?
Sand or investment cast with good fluidity; use generous risering and directional solidification, keep nitrogen in range, and always solution anneal ~1100–1150 °C followed by rapid water quench.
1.4515 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 cast duplex | ≤ 0.03 | 0.02 |
| Si | ≤ 1 | 0.7 |
| MnASTM A890 Gr.1B allows up to 1.00 | ≤ 1 | 0.7 |
| PA890 allows 0.04 max | ≤ 0.04 | |
| SA890 allows 0.04 max | ≤ 0.03 | |
| Cr | 24.5 – 26.5 | 25.5 |
| Ni | 5.6 – 6.5 | 6 |
| Mo | 1.8 – 2.5 | 2.1 |
| Cuimproves sulphuric-acid resistance | 2.7 – 3.3 | 3 |
| Nstabilises austenite, raises PREN | 0.1 – 0.25 | 0.18 |
| Fe | balance |
What surface finishes work on 1.4515?
Pickle and passivate (or electropolish) after heat treatment and grinding to restore the passive film; no anodising — shot blast/mechanical polish is acceptable for slurry surfaces.
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 1.4515 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- J93373
- ASTM
- CD4MCuN
- EN / DIN / Werkstoff-Nr.
- GX3CrNiMoCuN26-6-3
How much does 1.4515 cost?
1.4515 is a premium-cost stainless steel ($$$), cheaper than about 51% 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.
1.4515 — frequently asked
What is 1.4515 used for?
1.4515 is typically used for pump impellers, valve trim, seawater handling equipment and desalination components. In short: high-strength cast duplex; sulfuric acid erosion resistance; copper-bearing CD4MCu development.
What is the yield strength of 1.4515?
1.4515 has a typical yield strength of 540 MPa (78.3 ksi) and a tensile strength of 740 MPa (107 ksi) — stronger than 82% of stainless steel grades. Strength varies by condition: see the 4 listed tempers.
Is 1.4515 easy to machine?
Not especially — machinability is rated poor (28/100, worse than 79% of stainless steel grades). Machine like a 25Cr duplex: rigid setups, positive-rake coated carbide, ~40–70 m/min cutting speed, heavy feeds to cut under the work-hardened layer and copious flood coolant.
Can 1.4515 be welded?
Yes — weldability is rated good (60/100). Weldable with matching 25Cr-Cu duplex (or ER2594/E2553) filler; control heat input and interpass ≤150 °C to keep 35–55 % ferrite, avoid autogenous welds, and re-solution anneal + water quench where full corrosion performance is required.
What surface finishes work on 1.4515?
Pickle and passivate (or electropolish) after heat treatment and grinding to restore the passive film; no anodising — shot blast/mechanical polish is acceptable for slurry surfaces.
Can 1.4515 be formed, bent or molded?
Sand or investment cast with good fluidity; use generous risering and directional solidification, keep nitrogen in range, and always solution anneal ~1100–1150 °C followed by rapid water quench.
What is the maximum service temperature of 1.4515?
1.4515 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 1.4515-ST and 1.4515-AC?
ST is the default condition — the standard delivery condition for all pressure-retaining and corrosion service; restores the ferrite/austenite balance and dissolves intermetallics. AC: only an intermediate stage before solution annealing — as-cast material has intermetallic/nitride precipitation, low toughness and degraded corrosion resistance, and is not supplied for service. Yield strength is 540 MPa in ST versus 500 MPa in AC.
How much does 1.4515 cost?
1.4515 is a premium-cost stainless steel ($$$), cheaper than about 51% 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
- EN 10283 — Corrosion resistant steel castings — CEN (2010)
- ASTM A890/A890M — Castings, Iron-Chromium-Nickel-Molybdenum Corrosion-Resistant, Duplex (Grade 1B, CD4MCuN) — ASTM (2023)
- ASTM A995/A995M — Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-Containing Parts — ASTM (2020)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys (cast corrosion-resistant steels) — ASM International (1990)
- ASM Specialty Handbook: Stainless Steels (duplex cast alloys) — ASM International (1994)
- Duplex stainless casting grade datasheets (CD4MCuN / 1.4515) — stainless foundry producers (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.