Stainless Steel CE3MN HIP+SA
Heat-treated state
ASTM CE3MN · UNS J93404 · EN 1.4417, GX2CrNiMoN25-7-3
Choose for pressure-containing or fatigue-critical subsea castings where microporosity must be closed and toughness/soundness maximised.
Values for the HIP+SA condition
Other CE3MN tempers and conditions
CE3MN is listed in 3 conditions; see the grade overview at CE3MN.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Spheroidize annealed | Reference condition only: intermetallic and nitride precipitation from casting leaves low toughness and degraded corrosion resistance, so parts must be solution treated before service. | 540 | 720 | 12 | 28 HRC | 2.1 % IACS |
SADefault Solution annealed ≥1120 °C and water quenched | The only condition in which the grade may be supplied to A890/A995 — pick it for all seawater, offshore and chemical castings. | 560 | 780 | 28 | 24 HRC | — |
HIP+SAThis page hot isostatically pressed, then solution annealed and quenched | Choose for pressure-containing or fatigue-critical subsea castings where microporosity must be closed and toughness/soundness maximised. | 575 | 800 | 32 | 25 HRC | 2.2 % IACS |
What is CE3MN HIP+SA?
CE3MN HIP+SA is CE3MN heat treated to HIP+SA — choose for pressure-containing or fatigue-critical subsea castings where microporosity must be closed and toughness/soundness maximised. CE3MN HIP+SA has a yield strength of 575 MPa (83.4 ksi) and a tensile strength of 800 MPa (116 ksi) — stronger than 85% of stainless steel grades. Elongation at break is 32% and the elastic modulus is 200 GPa (29 Msi). CE3MN HIP+SA has a density of 7.8 g/cm³ (0.282 lb/in³), heavier than 50% of stainless steel grades. It melts at 1,350°C (2,462 °F). SA is the default condition FabDigit quotes; HIP+SA is available on request or by drawing note.
Advantages
- Good corrosion resistance — 87/100, better than 95% of stainless steel grades
- High strength — 575 MPa (83.4 ksi), better than 85% of stainless steel grades
Limitations
- Limited service temperature — 280°C (536 °F), worse than 96% of stainless steel grades
- Difficult to machine — 24/100, worse than 93% of stainless steel grades
CE3MN HIP+SA properties
Typical room-temperature values for CE3MN HIP+SA; 22 are specific to this condition. Other listed values are CE3MN reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
CE3MN HIP+SA has a density of 7.8 g/cm³ (0.282 lb/in³), heavier than 50% of stainless steel grades. It melts at 1,350°C (2,462 °F).
Mechanical16
CE3MN HIP+SA has a yield strength of 575 MPa (83.4 ksi) and a tensile strength of 800 MPa (116 ksi) — stronger than 85% of stainless steel grades. Elongation at break is 32% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
CE3MN HIP+SA is rated for continuous service to 280°C (536 °F). It conducts heat at 14 W/m·K (8.09 BTU/hr·ft·°F), worse than 80% of stainless steel grades. Thermal expansion is 13 µm/m·K (7.22 µin/in·°F).
Electrical3
CE3MN HIP+SA conducts electricity at 2.2 % IACS, worse than 61% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is excellent (87/100), better than 95% of stainless steel grades.
Sustainability4
Producing a kilogram of CE3MN HIP+SA takes about 75 MJ of energy and emits 5.2 kg of CO₂ — more than 84% of stainless steel grades. Typical recycled content is 70%.
Manufacturability8
CE3MN HIP+SA's machinability is poor (24/100, worse than 93% of stainless steel grades); weldability good (62/100); formability poor (27/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with CE3MN HIP+SA
Is CE3MN easy to machine?
Machine like super-duplex: rigid setup, sharp coated carbide, low-to-moderate speed with heavy positive feed and generous coolant to avoid work-hardened glazing.
Can CE3MN be welded?
GTAW/SMAW with 25.10.4L (2507-matching) filler, no preheat, interpass below ~150 °C and controlled heat input to keep ferrite 35-55 % and avoid sigma/nitride precipitation.
Can CE3MN be formed, bent or molded?
Cast product only — no cold forming; foundry must hold nitrogen recovery, feed heavy sections well and solution treat ≥1120 °C followed by rapid water quench.
What surface finishes work on CE3MN?
Grind/blast then citric or nitric passivation (ASTM A967); electropolishing gives best chloride performance, no anodising applicable.
CE3MN 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 |
|---|---|---|
| C | ≤ 0.03 | 0.02 |
| Mn | ≤ 1.5 | 0.8 |
| Si | ≤ 1 | 0.6 |
| P | ≤ 0.04 | 0.02 |
| S | ≤ 0.04 | 0.01 |
| Cr | 24 – 26 | 25 |
| Ni | 6 – 8 | 7 |
| Mo | 4 – 5 | 4.5 |
| Nkey austenite stabiliser; controls pitting resistance | 0.1 – 0.3 | 0.2 |
| Cu | ≤ 1.3 | 0.3 |
| Fe | balance | — |
CE3MN HIP+SA — frequently asked
What is CE3MN HIP+SA used for?
CE3MN HIP+SA is typically used for subsea valve bodies, high-chloride pump casings, offshore manifolds and desalination castings. In short: cast equivalent of 2507; best chloride resistance here; highest strength cast duplex.
What is the yield strength of CE3MN HIP+SA?
CE3MN HIP+SA has a typical yield strength of 575 MPa (83.4 ksi) and a tensile strength of 800 MPa (116 ksi) — stronger than 85% of stainless steel grades. Strength varies by condition: see the 3 listed tempers.
Is CE3MN HIP+SA easy to machine?
Not especially — machinability is rated poor (24/100, worse than 93% of stainless steel grades). Machine like super-duplex: rigid setup, sharp coated carbide, low-to-moderate speed with heavy positive feed and generous coolant to avoid work-hardened glazing.
Can CE3MN HIP+SA be welded?
Yes — weldability is rated good (62/100). GTAW/SMAW with 25.10.4L (2507-matching) filler, no preheat, interpass below ~150 °C and controlled heat input to keep ferrite 35-55 % and avoid sigma/nitride precipitation.
What surface finishes work on CE3MN HIP+SA?
Grind/blast then citric or nitric passivation (ASTM A967); electropolishing gives best chloride performance, no anodising applicable.
Can CE3MN HIP+SA be formed, bent or molded?
Cast product only — no cold forming; foundry must hold nitrogen recovery, feed heavy sections well and solution treat ≥1120 °C followed by rapid water quench.
What is the maximum service temperature of CE3MN HIP+SA?
CE3MN HIP+SA 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 CE3MN-SA and CE3MN-AC?
SA is the default condition — the only condition in which the grade may be supplied to A890/A995 — pick it for all seawater, offshore and chemical castings. AC: reference condition only: intermetallic and nitride precipitation from casting leaves low toughness and degraded corrosion resistance, so parts must be solution treated before service. Yield strength is 560 MPa in SA versus 540 MPa in AC.
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)
- EN 10283 — Corrosion-resistant steel castings (GX2CrNiMoN25-7-4, 1.4469/1.4477 family) — CEN (2019)
- Steel Castings Handbook, Supplement 8 — High Alloy Data Sheets, Corrosion Series — SFSA (2004)
- ASM Handbook Vol.1 & Vol.15 (Properties of Stainless Steels; Casting) — ASM International (2008)
- Sandvik SAF 2507 / UNS S32750 datasheet (physical property reference) — Alleima (Sandvik) (2023)
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.