Stainless Steel 1.4468
EN 1.4468 · UNS J93371 · ASTM A890 Grade 3A
1.4468 (GX2CrNiMoN25-6-3) is a copper-free 25Cr-6Ni-3Mo-N duplex stainless casting alloy, the European equivalent of ASTM A890 Grade 3A / CD6MN and UNS J93371.
Reference datasheet — 1.4468 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
1.4468 tempers and conditions
1.4468 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 |
|---|---|---|---|---|---|---|
Spheroidize annealed | Intermediate mill condition only — unbalanced phase ratio and interdendritic nitrides give low ductility and impaired corrosion resistance; not for service. | 500 | 700 | 12 | 24 HRC | 2.1 % IACS |
Weld repaired and re-solution annealed | Used for foundry-repaired castings; the mandatory re-solution treatment restores the ferrite/austenite balance in weld and HAZ. | 515 | 740 | 28 | 22 HRC | 2.2 % IACS |
SADefault Solution annealed ~1120 °C + water quench | The standard supply condition for all 1.4468 / A890 Gr 3A castings; balanced ~50/50 ferrite-austenite with full corrosion resistance. | 520 | 750 | 30 | 22 HRC | — |
Hot isostatically pressed then solution annealed | Choose for pressure-retaining or fatigue-critical castings where shrinkage porosity must be closed before final solution treatment. | 530 | 770 | 33 | 22 HRC | 2.2 % IACS |
Supply forms, finishes and certifications
Ways 1.4468 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
A995-3A | A995 Gr 3A | Certification |
What is 1.4468?
1.4468 (GX2CrNiMoN25-6-3) is a copper-free 25Cr-6Ni-3Mo-N duplex stainless casting alloy, the European equivalent of ASTM A890 Grade 3A / CD6MN and UNS J93371. Engineers specify it for pressure-containing castings that need roughly twice the yield of cast austenitics: 520 MPa yield, 750 MPa tensile, 30% elongation and 230 HB (22 HRC) in the solution-annealed condition, with SA+HIP available. Service is limited to 280 °C because of sigma-phase and 475 °C embrittlement, and machinability is low (score 30). Cast 2205 (1.4470) is the cheaper standard-duplex alternative. 1.4468 has a density of 7.8 g/cm³ (0.282 lb/in³), heavier than 50% of stainless steel grades. It melts at 1,400°C (2,552 °F). 1.4468 has a yield strength of 520 MPa (75.4 ksi) and a tensile strength of 750 MPa (109 ksi) — stronger than 79% of stainless steel grades. Elongation at break is 30% and the elastic modulus is 200 GPa (29 Msi).
What is 1.4468 used for?
- feedwater heater parts
- pump casings
- valve trim
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 — 280°C (536 °F), worse than 96% of stainless steel grades
- Limited formability — 25/100, worse than 78% of stainless steel grades
1.4468 properties
Typical room-temperature values for 1.4468-SA; bars are the position among stainless steel grades.
Physical3
1.4468 has a density of 7.8 g/cm³ (0.282 lb/in³), heavier than 50% of stainless steel grades. It melts at 1,400°C (2,552 °F).
Mechanical16
1.4468 has a yield strength of 520 MPa (75.4 ksi) and a tensile strength of 750 MPa (109 ksi) — stronger than 79% of stainless steel grades. Elongation at break is 30% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
1.4468 is rated for continuous service to 280°C (536 °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 13 µm/m·K (7.22 µin/in·°F).
Electrical3
1.4468 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 1.4468 takes about 55 MJ of energy and emits 4.6 kg of CO₂ — more than 50% of stainless steel grades. Typical recycled content is 80%.
Manufacturability8
1.4468's machinability is poor (30/100, worse than 70% of stainless steel grades); weldability good (62/100); 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. 1.4468 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1.4468
Is 1.4468 easy to machine?
Machine with rigid setups, sharp coated carbide, low speed (~60–90 m/min) and heavy positive feed to cut under the work-hardened layer; flood coolant is essential.
Can 1.4468 be welded?
Weldable with GTAW/SMAW using over-alloyed 25-9-4-N filler, low interpass (<150 °C) and controlled heat input; full re-solution anneal + water quench is preferred after major repairs.
Can 1.4468 be formed, bent or molded?
Sand or investment cast with generous risering and chills; always solution treat at ~1100–1140 °C and water quench to dissolve nitrides and restore ~50/50 phase balance.
1.4468 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 |
|---|---|---|
| CEN 10283 1.4468; ASTM A890 Gr 3A allows 0.06 max | ≤ 0.03 | 0.02 |
| Si | ≤ 1 | 0.7 |
| MnA890 Gr 3A: 1.00 max | ≤ 2 | 1 |
| P | ≤ 0.04 | 0.02 |
| S | ≤ 0.03 | 0.01 |
| Cr | 24.5 – 26.5 | 25.5 |
| NiA890 Gr 3A: 4.0–6.0 | 5.5 – 7 | 6.2 |
| MoA890 Gr 3A: 1.75–2.50 | 2.5 – 3.5 | 3 |
| N | 0.12 – 0.25 | 0.18 |
| Febalance; grade is intentionally copper-free | balance |
What surface finishes work on 1.4468?
Pickle and passivate (HNO₃/HF) or electropolish after heat treatment to remove scale; do not anodize — shot blasting with iron media must be avoided or followed by passivation.
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 1.4468 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- J93371
- ASTM
- A890 Grade 3A
- EN / DIN / Werkstoff-Nr.
- GX2CrNiMoN25-6-3
- Also called
- CD6MN
How much does 1.4468 cost?
1.4468 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.
1.4468 — frequently asked
What is 1.4468 used for?
1.4468 is typically used for feedwater heater parts, pump casings and valve trim. In short: copper-free CD6MN equivalent; 520 MPa cast duplex yield; high chloride pitting resistance.
What is the yield strength of 1.4468?
1.4468 has a typical yield strength of 520 MPa (75.4 ksi) and a tensile strength of 750 MPa (109 ksi) — stronger than 79% of stainless steel grades. Strength varies by condition: see the 4 listed tempers.
Is 1.4468 easy to machine?
Not especially — machinability is rated poor (30/100, worse than 70% of stainless steel grades). Machine with rigid setups, sharp coated carbide, low speed (~60–90 m/min) and heavy positive feed to cut under the work-hardened layer; flood coolant is essential.
Can 1.4468 be welded?
Yes — weldability is rated good (62/100). Weldable with GTAW/SMAW using over-alloyed 25-9-4-N filler, low interpass (<150 °C) and controlled heat input; full re-solution anneal + water quench is preferred after major repairs.
What surface finishes work on 1.4468?
Pickle and passivate (HNO₃/HF) or electropolish after heat treatment to remove scale; do not anodize — shot blasting with iron media must be avoided or followed by passivation.
Can 1.4468 be formed, bent or molded?
Sand or investment cast with generous risering and chills; always solution treat at ~1100–1140 °C and water quench to dissolve nitrides and restore ~50/50 phase balance.
What is the maximum service temperature of 1.4468?
1.4468 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 1.4468-SA and 1.4468-AC?
SA is the default condition — the standard supply condition for all 1.4468 / A890 Gr 3A castings; balanced ~50/50 ferrite-austenite with full corrosion resistance. AC: intermediate mill condition only — unbalanced phase ratio and interdendritic nitrides give low ductility and impaired corrosion resistance; not for service. Yield strength is 520 MPa in SA versus 500 MPa in AC.
How much does 1.4468 cost?
1.4468 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 (GX2CrNiMoN25-6-3, 1.4468) — CEN (2010)
- ASTM A890/A890M — Castings, Iron-Chromium-Nickel-Molybdenum Corrosion-Resistant, Duplex (Grade 3A / CD6MN) — 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 — ASM International (1990)
- Duplex stainless steel casting alloy data (physical & corrosion properties) — Foundry/producer datasheets (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.