Stainless Steel CD3MN CENT
Other
ASTM CD3MN · UNS J92205 · EN 1.4470, GX2CrNiMoN22-5-3
CENT = centrifugally cast tube/ring, solution annealed and quenched
Pick for seamless duplex rings, sleeves and pipe where centrifugal casting gives a denser, finer structure than static casting.
Values for the CENT condition
Other CD3MN tempers and conditions
CD3MN is listed in 5 conditions; see the grade overview at CD3MN.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Spheroidize annealed | Only for non-pressure, non-corrosive parts or intermediate stock — as-cast duplex has intermetallics and unbalanced phases, so corrosion and toughness are degraded. | 480 | 640 | 15 | 20 HRC | 2.2 % IACS |
SADefault Solution annealed ~1120 °C and water quenched | Standard supply condition for all pressure-retaining castings; restores the 50/50 ferrite–austenite balance and dissolves intermetallics. | 500 | 700 | 32 | 16 HRC | — |
Solution annealed with low-temperature impact qualification | Same heat treatment as SA but with tightened ferrite window and −46 °C Charpy testing for NORSOK/oil-and-gas subsea service. | 510 | 700 | 32 | 16 HRC | 2.2 % IACS |
hot isostatically pressed then solution annealed and quenched | Choose for critical subsea/high-pressure castings where internal porosity must be closed and impact/fatigue scatter minimized. | 520 | 730 | 36 | 17 HRC | 2.2 % IACS |
CENTThis page Centrifugally cast tube/ring, solution annealed and quenched | Pick for seamless duplex rings, sleeves and pipe where centrifugal casting gives a denser, finer structure than static casting. | 520 | 720 | 30 | 17 HRC | 2.2 % IACS |
What is CD3MN CENT?
CD3MN CENT is CD3MN in the CENT condition — pick for seamless duplex rings, sleeves and pipe where centrifugal casting gives a denser, finer structure than static casting. CD3MN CENT has a yield strength of 520 MPa (75.4 ksi) and a tensile strength of 720 MPa (104 ksi) — stronger than 79% of stainless steel grades. Elongation at break is 30% and the elastic modulus is 195 GPa (28.3 Msi). CD3MN CENT has a density of 7.8 g/cm³ (0.282 lb/in³), heavier than 50% of stainless steel grades. It melts at 1,385°C (2,525 °F). SA is the default condition FabDigit quotes; CENT is available on request or by drawing note.
Advantages
- Good corrosion resistance — 79/100, better than 86% of stainless steel grades
- High strength — 520 MPa (75.4 ksi), better than 79% of stainless steel grades
Limitations
- Limited service temperature — 290°C (554 °F), worse than 94% of stainless steel grades
CD3MN CENT properties
Typical room-temperature values for CD3MN CENT; 23 are specific to this condition. Other listed values are CD3MN reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
CD3MN CENT has a density of 7.8 g/cm³ (0.282 lb/in³), heavier than 50% of stainless steel grades. It melts at 1,385°C (2,525 °F).
Mechanical17
CD3MN CENT has a yield strength of 520 MPa (75.4 ksi) and a tensile strength of 720 MPa (104 ksi) — stronger than 79% of stainless steel grades. Elongation at break is 30% and the elastic modulus is 195 GPa (28.3 Msi).
Thermal6
CD3MN CENT is rated for continuous service to 290°C (554 °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
CD3MN CENT conducts electricity at 2.2 % IACS, worse than 61% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is very good (79/100), better than 86% of stainless steel grades.
Sustainability4
Producing a kilogram of CD3MN CENT takes about 55 MJ of energy and emits 4.5 kg of CO₂ — more than 50% of stainless steel grades. Typical recycled content is 80%.
Manufacturability8
CD3MN CENT's machinability is poor (29/100, worse than 76% of stainless steel grades); weldability very good (70/100); formability poor (30/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with CD3MN CENT
Is CD3MN easy to machine?
Machine like a work-hardening duplex: rigid setup, sharp coated carbide, ~60–90 m/min cutting speed, heavy positive feed to stay under the hardened skin, and generous coolant; expect ~25 % of 1212 productivity.
Can CD3MN be welded?
Readily welded by GTAW/GMAW/SMAW with 2209 (25.10.4L) over-alloyed filler; control heat input ~0.5–2.5 kJ/mm and interpass <150 °C to keep 35–65 % ferrite, no preheat, no PWHT unless a full re-solution + quench is applied.
Can CD3MN be formed, bent or molded?
Sand or investment cast with generous risering (solidification range and shrinkage similar to CF8M), then mandatory solution treatment at ~1080–1150 °C with rapid water quench; heavy sections need quench modelling to avoid sigma phase.
What surface finishes work on CD3MN?
Grind/blast with iron-free media, then pickle in HNO₃–HF or passivate per ASTM A967; electropolishing gives the best pitting performance and no anodizing or plating is used.
CD3MN 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 sensitization | ≤ 0.03 | 0.02 |
| MnA995 4A allows 1.50 max; A890 4A 1.00 max | ≤ 1.5 | 0.8 |
| Si | ≤ 1 | 0.7 |
| P | ≤ 0.04 | 0.02 |
| S | ≤ 0.02 | 0.01 |
| Cr | 21 – 23.5 | 22.2 |
| Ni | 4.5 – 6.5 | 5.5 |
| Mo | 2.5 – 3.5 | 3 |
| Curesidual limit | ≤ 1 | 0.2 |
| Nstabilizes austenite, raises PREN | 0.1 – 0.3 | 0.17 |
| Fe | balance | — |
CD3MN CENT — frequently asked
What is CD3MN CENT used for?
CD3MN CENT is typically used for pump casings, valve bodies, impellers and marine and offshore castings. In short: cast 2205 equivalent; weldable duplex casting; stronger than cast CF8M.
What is the yield strength of CD3MN CENT?
CD3MN CENT has a typical yield strength of 520 MPa (75.4 ksi) and a tensile strength of 720 MPa (104 ksi) — stronger than 79% of stainless steel grades. Strength varies by condition: see the 5 listed tempers.
Is CD3MN CENT easy to machine?
Not especially — machinability is rated poor (29/100, worse than 76% of stainless steel grades). Machine like a work-hardening duplex: rigid setup, sharp coated carbide, ~60–90 m/min cutting speed, heavy positive feed to stay under the hardened skin, and generous coolant; expect ~25 % of 1212 productivity.
Can CD3MN CENT be welded?
Yes — weldability is rated very good (70/100). Readily welded by GTAW/GMAW/SMAW with 2209 (25.10.4L) over-alloyed filler; control heat input ~0.5–2.5 kJ/mm and interpass <150 °C to keep 35–65 % ferrite, no preheat, no PWHT unless a full re-solution + quench is applied.
What surface finishes work on CD3MN CENT?
Grind/blast with iron-free media, then pickle in HNO₃–HF or passivate per ASTM A967; electropolishing gives the best pitting performance and no anodizing or plating is used.
Can CD3MN CENT be formed, bent or molded?
Sand or investment cast with generous risering (solidification range and shrinkage similar to CF8M), then mandatory solution treatment at ~1080–1150 °C with rapid water quench; heavy sections need quench modelling to avoid sigma phase.
What is the maximum service temperature of CD3MN CENT?
CD3MN CENT is rated for continuous use to about 290°C (554 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between CD3MN-SA and CD3MN SA-HIP?
SA is the default condition — standard supply condition for all pressure-retaining castings; restores the 50/50 ferrite–austenite balance and dissolves intermetallics. SA-HIP: choose for critical subsea/high-pressure castings where internal porosity must be closed and impact/fatigue scatter minimized. Yield strength is 500 MPa in SA versus 520 MPa in SA-HIP.
Sources
- 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)
- Practical Guidelines for the Fabrication of Duplex Stainless Steels — IMOA (2014)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- Steel Castings Handbook, Supplement 8 — High Alloy Data Sheets, Corrosion Series — SFSA (2004)
- EN 10283 / GX2CrNiMoN22-5-3 (1.4470) cast corrosion-resistant steels — CEN (2010)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.