Stainless Steel 1.4409
EN 1.4409 · UNS J92800 · ASTM A351 CF3M
1.4409 (GX2CrNiMo19-11-2) is a low-carbon, molybdenum-alloyed cast austenitic stainless steel, the European counterpart of ASTM A351 CF3M (J92800).
Reference datasheet — 1.4409 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 AT condition
1.4409 tempers and conditions
1.4409 is supplied in 4 conditions, soft to hard. AT 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 |
|---|---|---|---|---|---|---|
As fabricated | Only for non-critical, non-corrosive structural castings; interdendritic segregation and residual stress remain, so corrosion service is not qualified. | 240 | 480 | 25 | 160 HB | 2.2 % IACS |
ATDefault solution annealed 1050–1150 °C and water quenched | Standard delivery condition for all pressure-containing and corrosion-service castings; maximum corrosion resistance and ductility. | 250 | 520 | 45 | 150 HB | — |
hot isostatically pressed then solution annealed | Choose for high-integrity valve/pump castings and NDT-critical parts where microporosity must be closed; slightly higher ductility and impact energy. | 260 | 530 | 50 | 152 HB | 2.3 % IACS |
Ferrite-balanced high-strength variant (ASTM A351), solution annealed | Use when higher allowable stress is needed from the same chemistry family; composition balanced for controlled δ-ferrite, but ASTM restricts service to ≤ 425 °C. | 275 | 570 | 40 | 160 HB | 2.3 % IACS |
What is 1.4409?
1.4409 (GX2CrNiMo19-11-2) is a low-carbon, molybdenum-alloyed cast austenitic stainless steel, the European counterpart of ASTM A351 CF3M (J92800). The ≤0.03 % carbon suppresses grain-boundary carbide precipitation, so welded castings keep their intergranular corrosion resistance without re-annealing; parts are sand or investment cast, solution annealed and optionally HIP'd. Solution-annealed properties are about 250 MPa yield, 520 MPa tensile, 45 % elongation and 150 HB (80 HRB), with service to 550 °C. Strength is lower than nitrogen-alloyed CF3MN (1.4446), which is the choice when higher yield is needed. 1.4409 has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 68% of stainless steel grades. It melts at 1,390°C (2,534 °F). 1.4409 has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 91% of stainless steel grades. Elongation at break is 45% and the elastic modulus is 195 GPa (28.3 Msi).
What is 1.4409 used for?
- welded chemical valve bodies
- seawater pump casings
- cryogenic fittings
Advantages
- Readily welded — 88/100, better than 91% of stainless steel grades
- Ductile — tolerates forming and impact — 45%, better than 76% of stainless steel grades
Limitations
- Low strength — 250 MPa (36.3 ksi), worse than 91% of stainless steel grades
- Limited formability — 20/100, worse than 86% of stainless steel grades
- Hard to polish — 60/100, worse than 80% of stainless steel grades
1.4409 properties
Typical room-temperature values for 1.4409-AT; bars are the position among stainless steel grades.
Physical3
1.4409 has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 68% of stainless steel grades. It melts at 1,390°C (2,534 °F).
Mechanical15
1.4409 has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 91% of stainless steel grades. Elongation at break is 45% and the elastic modulus is 195 GPa (28.3 Msi).
Thermal6
1.4409 is rated for continuous service to 550°C (1,022 °F). It conducts heat at 14.5 W/m·K (8.38 BTU/hr·ft·°F), worse than 72% of stainless steel grades. Thermal expansion is 16 µm/m·K (8.89 µin/in·°F).
Electrical3
1.4409 conducts electricity at 2.3 % IACS, better than 55% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is very good (72/100), better than 73% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4409 takes about 52 MJ of energy and emits 4.5 kg of CO₂ — less than 76% of stainless steel grades. Typical recycled content is 75%.
Manufacturability8
1.4409's machinability is fair (38/100, better than 63% of stainless steel grades); weldability excellent (88/100); 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. 1.4409 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1.4409
Is 1.4409 easy to machine?
Gummy and work-hardening: use rigid setups, sharp positive-rake carbide, 60–120 m/min with heavy feed, flood coolant, and avoid dwelling to prevent glazing.
Can 1.4409 be welded?
Excellent — GTAW/SMAW with 316L/E316L or ER316LMn filler, no preheat, keep interpass < 150 °C; repair welds on solution-annealed parts generally need no re-anneal thanks to the ≤0.03% C.
Can 1.4409 be formed, bent or molded?
Sand or investment cast at 1560–1600 °C with generous risering (≈2.3% solidification shrinkage); solution anneal 1050–1150 °C and water quench, then pickle/passivate.
1.4409 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 for intergranular corrosion resistance | ≤ 0.03 | 0.02 |
| Si | ≤ 1.5 | 1 |
| MnA351 CF3M allows ≤1.50 | ≤ 1.5 | 1 |
| PA351: ≤0.040 | ≤ 0.04 | 0.02 |
| SA351: ≤0.040 | ≤ 0.03 | 0.01 |
| CrA351 CF3M: 17.0–21.0 | 18 – 20 | 19 |
| NiA351 CF3M: 9.0–13.0 | 9 – 12 | 10.5 |
| MoA351 CF3M: 2.0–3.0 | 2 – 2.5 | 2.3 |
| N | ≤ 0.2 | 0.05 |
| Fe | balance |
What surface finishes work on 1.4409?
Shot blast, pickle in HNO3-HF then passivate per ASTM A967; electropolishing gives the best hygienic finish — no anodizing possible.
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 1.4409 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- J92800
- ASTM
- A351 CF3M
- EN / DIN / Werkstoff-Nr.
- GX2CrNiMo19-11-2
- Other
- CF3M
How much does 1.4409 cost?
1.4409 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.
1.4409 — frequently asked
What is 1.4409 used for?
1.4409 is typically used for welded chemical valve bodies, seawater pump casings and cryogenic fittings. In short: weld-repairable CF3M casting; low-carbon 316 equivalent.
What is the yield strength of 1.4409?
1.4409 has a typical yield strength of 250 MPa (36.3 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 91% of stainless steel grades. Strength varies by condition: see the 4 listed tempers.
Is 1.4409 easy to machine?
Not especially — machinability is rated fair (38/100, better than 63% of stainless steel grades). Gummy and work-hardening: use rigid setups, sharp positive-rake carbide, 60–120 m/min with heavy feed, flood coolant, and avoid dwelling to prevent glazing.
Can 1.4409 be welded?
Yes — weldability is rated excellent (88/100). Excellent — GTAW/SMAW with 316L/E316L or ER316LMn filler, no preheat, keep interpass < 150 °C; repair welds on solution-annealed parts generally need no re-anneal thanks to the ≤0.03% C.
What surface finishes work on 1.4409?
Shot blast, pickle in HNO3-HF then passivate per ASTM A967; electropolishing gives the best hygienic finish — no anodizing possible.
Can 1.4409 be formed, bent or molded?
Sand or investment cast at 1560–1600 °C with generous risering (≈2.3% solidification shrinkage); solution anneal 1050–1150 °C and water quench, then pickle/passivate.
What is the maximum service temperature of 1.4409?
1.4409 is rated for continuous use to about 550°C (1,022 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 1.4409-AT and 1.4409 CF3MA?
AT is the default condition — standard delivery condition for all pressure-containing and corrosion-service castings; maximum corrosion resistance and ductility. CF3MA: use when higher allowable stress is needed from the same chemistry family; composition balanced for controlled δ-ferrite, but ASTM restricts service to ≤ 425 °C. Yield strength is 250 MPa in AT versus 275 MPa in CF3MA.
How much does 1.4409 cost?
1.4409 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 A351/A351M — Castings, Austenitic, for Pressure-Containing Parts — ASTM (2020)
- ASTM A743/A744 — Corrosion-Resistant Iron-Chromium-Nickel Castings — ASTM (2021)
- ASM Specialty Handbook: Stainless Steels — ASM International (1994)
- Steel Castings Handbook, 6th ed. — SFSA / ASM International (1995)
- Corrosion Handbook — Outokumpu (2015)
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.