Stainless Steel 1.4470
EN 1.4470 · UNS J92205 · ASTM A890 Grade 4A
1.4470 (GX2CrNiMoN22-5-3) is the cast form of standard 22Cr-5Ni-3Mo-N duplex stainless steel, matching ASTM A890 Grade 4A and UNS J92205.
Reference datasheet — 1.4470 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
1.4470 tempers and conditions
1.4470 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 | Only for non-critical, non-corrosive decorative or structural parts — inter-metallic/nitride precipitates cut ductility, toughness and pitting resistance sharply. | 480 | 640 | 12 | 24 HRC | 2.2 % IACS |
SADefault Solution annealed ~1120 °C and water quenched | Standard and essentially the only certified supply condition for pressure-retaining duplex castings; gives balanced 50/50 microstructure and full corrosion resistance. | 500 | 700 | 30 | 21 HRC | — |
Hot isostatically pressed then solution annealed and quenched | Choose for thick-section subsea/pump castings where microporosity must be closed to raise fatigue life and NDE acceptance. | 520 | 730 | 34 | 22 HRC | 2.2 % IACS |
Centrifugally cast, solution annealed and quenched | For duplex pipe, sleeves and rings — directional solidification gives denser, slightly stronger and more uniform structure than static castings. | 530 | 730 | 28 | 22 HRC | 2.2 % IACS |
What is 1.4470?
1.4470 (GX2CrNiMoN22-5-3) is the cast form of standard 22Cr-5Ni-3Mo-N duplex stainless steel, matching ASTM A890 Grade 4A and UNS J92205. It is the general-purpose cast duplex, offering 500 MPa yield, 700 MPa tensile, 30% elongation and 230 HB (21 HRC) solution annealed, and is available as sand, investment and centrifugal castings, with SA+HIP for pressure-tight parts. Service is capped at 260 °C, and the alloy must be solution treated and water quenched after casting or major repair welding. Step up to 1.4469 super duplex for seawater or sour service. 1.4470 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). 1.4470 has a yield strength of 500 MPa (72.5 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 77% of stainless steel grades. Elongation at break is 30% and the elastic modulus is 195 GPa (28.3 Msi).
What is 1.4470 used for?
- pump casings
- valve bodies
- seawater piping components
Advantages
- Good corrosion resistance — 78/100, better than 84% of stainless steel grades
- High strength — 500 MPa (72.5 ksi), better than 77% of stainless steel grades
Limitations
- Limited service temperature — 260°C (500 °F), worse than 98% of stainless steel grades
- Limited formability — 20/100, worse than 86% of stainless steel grades
1.4470 properties
Typical room-temperature values for 1.4470-SA; bars are the position among stainless steel grades.
Physical3
1.4470 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).
Mechanical17
1.4470 has a yield strength of 500 MPa (72.5 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 77% of stainless steel grades. Elongation at break is 30% and the elastic modulus is 195 GPa (28.3 Msi).
Thermal6
1.4470 is rated for continuous service to 260°C (500 °F). It conducts heat at 15.5 W/m·K (8.96 BTU/hr·ft·°F), better than 53% of stainless steel grades. Thermal expansion is 13 µm/m·K (7.22 µin/in·°F).
Electrical3
1.4470 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 1.4470 takes about 55 MJ of energy and emits 5 kg of CO₂ — more than 50% of stainless steel grades. Typical recycled content is 80%.
Manufacturability7
1.4470's machinability is poor (32/100, worse than 62% of stainless steel grades); weldability very good (70/100); 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. 1.4470 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1.4470
Is 1.4470 easy to machine?
Machine like 2205 wrought duplex: rigid setup, sharp coated carbide, moderate speed (~60–90 m/min) with heavy positive feed to cut under the work-hardened skin, plus copious coolant.
Can 1.4470 be welded?
Readily weldable with 2209/25-9-4 filler or matching cast electrodes; keep heat input 0.5–2.5 kJ/mm, interpass <150 °C, and re-solution-anneal + water quench after major repair welds to restore phase balance.
Can 1.4470 be formed, bent or molded?
Sand, investment or centrifugal casting with good fluidity but ~2.2 % solidification shrinkage — needs generous risering and controlled pouring 1520–1560 °C; always follow with 1100–1150 °C solution treatment and rapid water quench.
1.4470 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 | 0.6 |
| MnASTM A995 Gr 4A allows ≤1.50 | ≤ 2 | 1 |
| P | ≤ 0.04 | |
| SA995 Gr 4A ≤0.020 | ≤ 0.03 | |
| CrA995 Gr 4A 21.0–23.5 | 21 – 23 | 22 |
| Ni | 4.5 – 6.5 | 5.5 |
| Mo | 2.5 – 3.5 | 3 |
| NA995 Gr 4A 0.10–0.30 | 0.12 – 0.2 | 0.16 |
| Curesidual limit per A995 | ≤ 1 | |
| Fe | balance |
What surface finishes work on 1.4470?
Pickle and passivate (HNO3–HF) after heat treatment to remove scale; polishes and electropolishes reasonably well, though the two phases can etch at slightly different rates.
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 1.4470 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- J92205
- ASTM
- A890 Grade 4A
- EN / DIN / Werkstoff-Nr.
- GX2CrNiMoN22-5-3
- Also called
- CD3MN
How much does 1.4470 cost?
1.4470 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.
1.4470 — frequently asked
What is 1.4470 used for?
1.4470 is typically used for pump casings, valve bodies and seawater piping components. In short: general-purpose cast duplex; cast 2205 equivalent; widely available casting grade.
What is the yield strength of 1.4470?
1.4470 has a typical yield strength of 500 MPa (72.5 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 77% of stainless steel grades. Strength varies by condition: see the 4 listed tempers.
Is 1.4470 easy to machine?
Not especially — machinability is rated poor (32/100, worse than 62% of stainless steel grades). Machine like 2205 wrought duplex: rigid setup, sharp coated carbide, moderate speed (~60–90 m/min) with heavy positive feed to cut under the work-hardened skin, plus copious coolant.
Can 1.4470 be welded?
Yes — weldability is rated very good (70/100). Readily weldable with 2209/25-9-4 filler or matching cast electrodes; keep heat input 0.5–2.5 kJ/mm, interpass <150 °C, and re-solution-anneal + water quench after major repair welds to restore phase balance.
What surface finishes work on 1.4470?
Pickle and passivate (HNO3–HF) after heat treatment to remove scale; polishes and electropolishes reasonably well, though the two phases can etch at slightly different rates.
Can 1.4470 be formed, bent or molded?
Sand, investment or centrifugal casting with good fluidity but ~2.2 % solidification shrinkage — needs generous risering and controlled pouring 1520–1560 °C; always follow with 1100–1150 °C solution treatment and rapid water quench.
What is the maximum service temperature of 1.4470?
1.4470 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 1.4470-SA and 1.4470 CF-SA?
SA is the default condition — standard and essentially the only certified supply condition for pressure-retaining duplex castings; gives balanced 50/50 microstructure and full corrosion resistance. CF-SA: for duplex pipe, sleeves and rings — directional solidification gives denser, slightly stronger and more uniform structure than static castings. Yield strength is 500 MPa in SA versus 530 MPa in CF-SA.
How much does 1.4470 cost?
1.4470 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 A995/A995M — Castings, Austenitic-Ferritic (Duplex) Stainless Steel for Pressure-Containing Parts — ASTM (2020)
- ASTM A890/A890M — Castings, Iron-Chromium-Nickel-Molybdenum Corrosion-Resistant, Duplex — ASTM (2018)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- Practical Guidelines for the Fabrication of Duplex Stainless Steels — IMOA (2014)
- GB/T 2100 / GB/T 12230 — SAC (2017)
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.