Stainless Steel 1.4517
EN 1.4517 · UNS J93370 · ASTM A890 Grade 1B
1.4517 (GX2CrNiMoCuN25-6-3-3, ASTM A890 Grade 1B, J93370) is the European cast duplex equivalent of the widely used CD4MCu, a 25Cr-6Ni-3Mo-3Cu grade with a roughly balanced ferrite/austenite structure.
Reference datasheet — 1.4517 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
1.4517 tempers and conditions
1.4517 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 for non-corrosive, non-pressure or machining-stock parts — as-cast structure contains sigma/carbide risk and must not be used in service. | 470 | 620 | 8 | 26 HRC | 2.1 % IACS |
STDefault Solution annealed | Standard delivery condition for all pressure- and corrosion-service castings; balanced ferrite/austenite, no sigma phase. | 520 | 700 | 25 | 23 HRC | — |
Hot isostatically pressed then solution treated and quenched | Choose for critical pump/valve castings needing closed microporosity, higher ductility and better fatigue/NDT acceptance. | 540 | 730 | 30 | 23 HRC | 2.2 % IACS |
Solution treated, quenched and copper-precipitation aged | Optional condition for maximum hardness/wear resistance on slurry-pump parts; sacrifices impact toughness and some corrosion margin, not permitted by ASTM A890 pressure ratings. | 700 | 850 | 10 | 34 HRC | 2.4 % IACS |
What is 1.4517?
1.4517 (GX2CrNiMoCuN25-6-3-3, ASTM A890 Grade 1B, J93370) is the European cast duplex equivalent of the widely used CD4MCu, a 25Cr-6Ni-3Mo-3Cu grade with a roughly balanced ferrite/austenite structure. Solution-treated castings give 520 MPa yield, 700 MPa tensile, 25% elongation and 240 HB (23 HRC), with erosion and corrosion resistance (score 78) suited to aggressive chloride and acid service; conditions on file are ST, ST+HIP, ST+aged and as-cast. Service is limited to 260 °C and weldability is moderate (score 55) because phase balance must be re-established after welding. 1.4515 (CD4MCuN) is the nearest alternative. 1.4517 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). 1.4517 has a yield strength of 520 MPa (75.4 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 79% of stainless steel grades. Elongation at break is 25% and the elastic modulus is 200 GPa (29 Msi).
What is 1.4517 used for?
- pump casings and impellers
- valve bodies
- seawater and brine handling
- oil & gas equipment
Advantages
- Good corrosion resistance — 78/100, better than 84% of stainless steel grades
- High strength — 520 MPa (75.4 ksi), better than 79% of stainless steel grades
Limitations
- Limited service temperature — 260°C (500 °F), worse than 98% of stainless steel grades
- Hard to polish — 60/100, worse than 80% of stainless steel grades
- Limited formability — 25/100, worse than 78% of stainless steel grades
- Low fracture toughness — 90 MPa·√m (81.9 ksi·√in), worse than 75% of stainless steel grades
1.4517 properties
Typical room-temperature values for 1.4517-ST; bars are the position among stainless steel grades.
Physical3
1.4517 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).
Mechanical16
1.4517 has a yield strength of 520 MPa (75.4 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 79% of stainless steel grades. Elongation at break is 25% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
1.4517 is rated for continuous service to 260°C (500 °F). It conducts heat at 15 W/m·K (8.67 BTU/hr·ft·°F), worse than 59% of stainless steel grades. Thermal expansion is 12.5 µm/m·K (6.94 µin/in·°F).
Electrical3
1.4517 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 1.4517 takes about 55 MJ of energy and emits 4.6 kg of CO₂ — more than 50% of stainless steel grades. Typical recycled content is 70%.
Manufacturability7
1.4517's machinability is poor (30/100, worse than 70% of stainless steel grades); weldability good (55/100); formability poor (25/100).
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. 1.4517 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1.4517
Is 1.4517 easy to machine?
Machine like 25Cr duplex: rigid setup, positive-rake carbide, low speed (~60–90 m/min) with heavy constant feed and flood coolant to beat work hardening and abrasive cast skin.
Can 1.4517 be welded?
Weldable with 25Cr duplex or 25-9-4 over-alloyed filler (GTAW/SMAW), low heat input, interpass <150 °C; full re-solution treatment and water quench after major repair welds is preferred to restore phase balance.
Can 1.4517 be formed, bent or molded?
Supplied as sand or investment castings only — design generous radii and directional solidification with risering; no cold forming.
1.4517 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 to avoid carbide sensitisation | ≤ 0.03 | 0.02 |
| Si | ≤ 1 | 0.7 |
| Mn | ≤ 1.5 | 0.8 |
| P | ≤ 0.04 | 0.02 |
| S | ≤ 0.03 | 0.01 |
| Cr | 24.5 – 26.5 | 25.5 |
| Ni | 5 – 7 | 6 |
| Mo | 2.5 – 3.5 | 3 |
| Cuprecipitation-hardenable, improves H2SO4 resistance | 2.5 – 3.5 | 3 |
| N | 0.12 – 0.25 | 0.18 |
| Fe | balance |
What surface finishes work on 1.4517?
Pickle and passivate after heat treatment to remove scale; grinds and polishes reasonably well but the hard ferrite/austenite mix makes mirror finishing slow — no anodizing.
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 1.4517 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- J93370
- ASTM
- A890 Grade 1B
- EN / DIN / Werkstoff-Nr.
- GX2CrNiMoCuN25-6-3-3
- Also called
- CD4MCu
How much does 1.4517 cost?
1.4517 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.
1.4517 — frequently asked
What is 1.4517 used for?
1.4517 is typically used for pump casings and impellers, valve bodies, seawater and brine handling and oil & gas equipment. In short: standard A890 1B duplex; erosion-resistant pump castings; high strength, high chloride resistance.
What is the yield strength of 1.4517?
1.4517 has a typical yield strength of 520 MPa (75.4 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 79% of stainless steel grades. Strength varies by condition: see the 4 listed tempers.
Is 1.4517 easy to machine?
Not especially — machinability is rated poor (30/100, worse than 70% of stainless steel grades). Machine like 25Cr duplex: rigid setup, positive-rake carbide, low speed (~60–90 m/min) with heavy constant feed and flood coolant to beat work hardening and abrasive cast skin.
Can 1.4517 be welded?
Yes — weldability is rated good (55/100). Weldable with 25Cr duplex or 25-9-4 over-alloyed filler (GTAW/SMAW), low heat input, interpass <150 °C; full re-solution treatment and water quench after major repair welds is preferred to restore phase balance.
What surface finishes work on 1.4517?
Pickle and passivate after heat treatment to remove scale; grinds and polishes reasonably well but the hard ferrite/austenite mix makes mirror finishing slow — no anodizing.
Can 1.4517 be formed, bent or molded?
Supplied as sand or investment castings only — design generous radii and directional solidification with risering; no cold forming.
What is the maximum service temperature of 1.4517?
1.4517 is rated for continuous use to about 260°C (500 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 1.4517-ST and 1.4517-AC?
ST is the default condition — standard delivery condition for all pressure- and corrosion-service castings; balanced ferrite/austenite, no sigma phase. AC: only for non-corrosive, non-pressure or machining-stock parts — as-cast structure contains sigma/carbide risk and must not be used in service. Yield strength is 520 MPa in ST versus 470 MPa in AC.
How much does 1.4517 cost?
1.4517 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 (GX2CrNiMoCuN25-6-3-3, 1.4517) — CEN (2010)
- ASTM A890/A890M — Castings, Iron-Chromium-Nickel-Molybdenum Corrosion-Resistant, Duplex (Grade 1B, CD4MCuN) — ASTM International (2018)
- ASTM A995/A995M — Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-Containing Parts — ASTM International (2020)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys (cast stainless steels) — ASM International (1990)
- Duplex stainless steel casting grade datasheets (25Cr Cu-bearing) — Various foundries (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.