Stainless Steel 1.4416
EN 1.4416
1.4416 (GX2NiCrMoN25-20-5) is a low-carbon, nitrogen-alloyed superaustenitic cast stainless steel with roughly 25 % Ni, 20 % Cr and 5 % Mo, well above the CF8M/CF3M alloy level.
Reference datasheet — 1.4416 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
1.4416 tempers and conditions
1.4416 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 |
|---|---|---|---|---|---|---|
SADefault Solution annealed 1080–1150 °C + rapid water quench | Standard delivery condition for all corrosion-service castings — maximum corrosion resistance and ductility, fully austenitic and intermetallic-free. | 270 | 520 | 35 | 170 HB | — |
Hot isostatically pressed then solution annealed and quenched | Chosen for pressure-retaining or radiographically critical pump/valve parts: HIP closes microporosity, raising ductility, toughness and fatigue life. | 280 | 545 | 42 | 175 HB | 1.7 % IACS |
As-welded deposit | Condition of production weld repairs on thin sections where re-solution treatment is impractical; expect somewhat lower HAZ ductility and locally reduced pitting resistance. | 280 | 510 | 28 | 9 HRC | 1.6 % IACS |
Spheroidize annealed | Only for non-corrosive structural or rough/oversize blanks — interdendritic σ/χ and carbide/nitride segregation cut ductility, toughness and corrosion resistance. | 290 | 500 | 20 | 11 HRC | 1.6 % IACS |
What is 1.4416?
1.4416 (GX2NiCrMoN25-20-5) is a low-carbon, nitrogen-alloyed superaustenitic cast stainless steel with roughly 25 % Ni, 20 % Cr and 5 % Mo, well above the CF8M/CF3M alloy level. It is chosen for sand or investment castings in severe acid service such as sulfuric acid pumps and flue-gas desulfurisation hardware, solution annealed and water quenched. Typical values are 270 MPa yield, 520 MPa tensile, 35 % elongation, 170 HB and a 450 °C service limit; machinability is rated 25, the lowest in this family. Cost and machining effort are the trade-offs — CF3M (1.4409) suits moderate duty. 1.4416 has a density of 8 g/cm³ (0.289 lb/in³), heavier than 92% of stainless steel grades. It melts at 1,330°C (2,426 °F). 1.4416 has a yield strength of 270 MPa (39.2 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 79% of stainless steel grades. Elongation at break is 35% and the elastic modulus is 195 GPa (28.3 Msi).
What is 1.4416 used for?
- sulfuric acid pumps
- flue-gas desulfurization components
- chemical process castings
Advantages
- Good corrosion resistance — 86/100, better than 94% of stainless steel grades
Limitations
- Poor heat conductor — 12 W/m·K (6.93 BTU/hr·ft·°F), worse than 93% of stainless steel grades
- Low electrical conductivity — 1.7 % IACS, worse than 93% of stainless steel grades
- Difficult to machine — 25/100, worse than 88% of stainless steel grades
- Hard to polish — 60/100, worse than 80% of stainless steel grades
- Low strength — 270 MPa (39.2 ksi), worse than 79% of stainless steel grades
1.4416 properties
Typical room-temperature values for 1.4416-SA; bars are the position among stainless steel grades.
Physical3
1.4416 has a density of 8 g/cm³ (0.289 lb/in³), heavier than 92% of stainless steel grades. It melts at 1,330°C (2,426 °F).
Mechanical15
1.4416 has a yield strength of 270 MPa (39.2 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 79% of stainless steel grades. Elongation at break is 35% and the elastic modulus is 195 GPa (28.3 Msi).
Thermal6
1.4416 is rated for continuous service to 450°C (842 °F). It conducts heat at 12 W/m·K (6.93 BTU/hr·ft·°F), worse than 93% of stainless steel grades. Thermal expansion is 15.5 µm/m·K (8.61 µin/in·°F).
Electrical3
1.4416 conducts electricity at 1.7 % IACS, worse than 93% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is excellent (86/100), better than 94% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4416 takes about 75 MJ of energy and emits 5.5 kg of CO₂ — more than 84% of stainless steel grades. Typical recycled content is 55%.
Manufacturability8
1.4416's machinability is poor (25/100, worse than 88% of stainless steel grades); weldability very good (70/100); formability poor (30/100).
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. 1.4416 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1.4416
Is 1.4416 easy to machine?
Tough and strongly work-hardening: use rigid setups, positive-rake coated carbide, low speed with heavy feed, generous flood coolant and no dwelling to avoid glazing.
Can 1.4416 be welded?
GTAW/GMAW or SMAW with over-alloyed Ni-base filler (e.g. ERNiCrMo-3/-4); keep heat input and interpass temperature low, no preheat, and back-purge to avoid σ-phase and hot cracking.
Can 1.4416 be formed, bent or molded?
Supplied as sand or investment castings with a wide freezing range — needs good gating/feeding, chills on heavy sections and solution treatment plus water quench after cleaning.
1.4416 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 |
|---|---|---|
| Cextra-low carbon to avoid carbide precipitation | ≤ 0.03 | 0.02 |
| Si | ≤ 1 | 0.6 |
| Mn | ≤ 2 | 1 |
| P | ≤ 0.04 | |
| S | ≤ 0.02 | |
| Cr | 19 – 21 | 20 |
| Ni | 24 – 26 | 25 |
| Mo | 4 – 5 | 4.5 |
| Nstrengthens and stabilises austenite, raises PREN | 0.1 – 0.2 | 0.15 |
| Cuoften added for sulfuric acid service | ≤ 1.5 | 0.8 |
| Fe | balance |
What surface finishes work on 1.4416?
Pickle and passivate (HNO₃ or HNO₃/HF) or electropolish after grinding; mechanical polishing works but casting microporosity limits mirror finishes; no anodizing.
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 1.4416 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- GX2NiCrMoN25-20-5
How much does 1.4416 cost?
1.4416 is a high-cost stainless steel ($$$$), pricier than about 78% 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.
1.4416 — frequently asked
What is 1.4416 used for?
1.4416 is typically used for sulfuric acid pumps, flue-gas desulfurization components and chemical process castings. In short: superaustenitic acid-service casting; highest corrosion resistance here; lowest machinability in family.
What is the yield strength of 1.4416?
1.4416 has a typical yield strength of 270 MPa (39.2 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 79% of stainless steel grades. Strength varies by condition: see the 4 listed tempers.
Is 1.4416 easy to machine?
Not especially — machinability is rated poor (25/100, worse than 88% of stainless steel grades). Tough and strongly work-hardening: use rigid setups, positive-rake coated carbide, low speed with heavy feed, generous flood coolant and no dwelling to avoid glazing.
Can 1.4416 be welded?
Yes — weldability is rated very good (70/100). GTAW/GMAW or SMAW with over-alloyed Ni-base filler (e.g. ERNiCrMo-3/-4); keep heat input and interpass temperature low, no preheat, and back-purge to avoid σ-phase and hot cracking.
What surface finishes work on 1.4416?
Pickle and passivate (HNO₃ or HNO₃/HF) or electropolish after grinding; mechanical polishing works but casting microporosity limits mirror finishes; no anodizing.
Can 1.4416 be formed, bent or molded?
Supplied as sand or investment castings with a wide freezing range — needs good gating/feeding, chills on heavy sections and solution treatment plus water quench after cleaning.
What is the maximum service temperature of 1.4416?
1.4416 is rated for continuous use to about 450°C (842 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 1.4416-SA and 1.4416-AC?
SA is the default condition — standard delivery condition for all corrosion-service castings — maximum corrosion resistance and ductility, fully austenitic and intermetallic-free. AC: only for non-corrosive structural or rough/oversize blanks — interdendritic σ/χ and carbide/nitride segregation cut ductility, toughness and corrosion resistance. Yield strength is 270 MPa in SA versus 290 MPa in AC.
How much does 1.4416 cost?
1.4416 is a high-cost stainless steel ($$$$), pricier than about 78% 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 10213 — Steel castings for pressure purposes — CEN (2016)
- EN 10283 — Corrosion resistant steel castings — CEN (2010)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol.13B — Corrosion: Materials — ASM International (2005)
- Superaustenitic cast stainless steel (6Mo-class) datasheets — Foundry/producer literature (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.