Stainless Steel 1.4563
EN 1.4563 · UNS N08031, N08028 · also Alloy 31 / Nicrofer 3127hMo
1.4563 (X1NiCrMoCu31-27-4, N08031, Alloy 31 / Nicrofer 3127hMo) is a high-nickel superaustenitic stainless steel with chromium, molybdenum and copper, used as an upgrade from 904L and 1.4529 (926) in hot sulfuric and phosphoric acid and in chloride pitting service.
Reference datasheet — 1.4563 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
1.4563 tempers and conditions
1.4563 is supplied in 3 conditions, soft to hard. AT is the default FabDigit quotes; the values on this page are for it.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
ATDefault Solution annealed and quenched | Standard corrosion-service condition for plate, pipe, fittings and forgings — maximum corrosion resistance and ductility. | 330 | 700 | 50 | 170 HB | — |
Cold drawn | Choose for close-tolerance bar, shafting and machined fittings where higher yield strength is wanted over maximum ductility. | 620 | 870 | 25 | 22 HRC | — |
Cold worked | Used where extra strength or springback is required in thin sections; corrosion resistance is essentially retained but ductility and formability drop sharply. | 700 | 950 | 18 | 30 HRC | — |
Supply forms, finishes and certifications
Ways 1.4563 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
1D | Hot rolled, solution annealed and pickled plate | Surface finish |
2B | Cold rolled, annealed, pickled and skin-passed sheet | Surface finish |
What is 1.4563?
1.4563 (X1NiCrMoCu31-27-4, N08031, Alloy 31 / Nicrofer 3127hMo) is a high-nickel superaustenitic stainless steel with chromium, molybdenum and copper, used as an upgrade from 904L and 1.4529 (926) in hot sulfuric and phosphoric acid and in chloride pitting service. Solution-annealed properties are about 330 MPa yield, 700 MPa tensile, 50 % elongation and 170 HB, with a corrosion resistance score of 92 and service to 400 °C, in 1D plate, 2B sheet, cold-drawn bar and cold-worked product. Machinability is the main constraint (score 22) and nickel-base filler is mandatory, so specify 904L where the acid duty allows. 1.4563 has a density of 8.02 g/cm³ (0.29 lb/in³), heavier than 97% of stainless steel grades. It melts at 1,320°C (2,408 °F). 1.4563 has a yield strength of 330 MPa (47.9 ksi) and a tensile strength of 700 MPa (102 ksi) — weaker than 57% of stainless steel grades. Elongation at break is 50% and the elastic modulus is 195 GPa (28.3 Msi).
What is 1.4563 used for?
- sulfuric acid coolers and heat exchangers
- phosphoric acid production
- flue gas desulfurization
- chemical process equipment
Advantages
- Good corrosion resistance — 92/100, better than 99% of stainless steel grades
- Ductile — tolerates forming and impact — 50%, better than 90% of stainless steel grades
Limitations
- Poor heat conductor — 11 W/m·K (6.36 BTU/hr·ft·°F), worse than 99% of stainless steel grades
- High embodied carbon — 8 kg CO₂/kg, worse than 99% of stainless steel grades
- Difficult to machine — 22/100, worse than 95% of stainless steel grades
- Low electrical conductivity — 1.7 % IACS, worse than 93% of stainless steel grades
- Limited service temperature — 400°C (752 °F), worse than 78% of stainless steel grades
1.4563 properties
Typical room-temperature values for 1.4563-AT; bars are the position among stainless steel grades.
Physical3
1.4563 has a density of 8.02 g/cm³ (0.29 lb/in³), heavier than 97% of stainless steel grades. It melts at 1,320°C (2,408 °F).
Mechanical14
1.4563 has a yield strength of 330 MPa (47.9 ksi) and a tensile strength of 700 MPa (102 ksi) — weaker than 57% of stainless steel grades. Elongation at break is 50% and the elastic modulus is 195 GPa (28.3 Msi).
Thermal5
1.4563 is rated for continuous service to 400°C (752 °F). It conducts heat at 11 W/m·K (6.36 BTU/hr·ft·°F), worse than 99% of stainless steel grades. Thermal expansion is 14.5 µm/m·K (8.06 µin/in·°F).
Electrical3
1.4563 conducts electricity at 1.7 % IACS, worse than 93% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is excellent (92/100), better than 99% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4563 takes about 100 MJ of energy and emits 8 kg of CO₂ — more than 98% of stainless steel grades. Typical recycled content is 40%.
Manufacturability7
1.4563's machinability is poor (22/100, worse than 95% of stainless steel grades); weldability very good (75/100); formability good (65/100).
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. 1.4563 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1.4563
Is 1.4563 easy to machine?
Very gummy and strongly work hardening — use rigid setups, positive-rake sharp carbide, low speed with heavy feed, never dwell, and flood high-pressure coolant.
Can 1.4563 be welded?
Weld with GTAW/GMAW/SMAW using overalloyed Ni-base filler (ERNiCrMo-3/-4 or matching 31 filler), low heat input, interpass <150 °C, no preheat, backing gas on root; PWHT normally not required.
Can 1.4563 be formed, bent or molded?
Cold forms well but needs ~50 % more force than 316L and generous springback allowance; hot work 1150–900 °C followed by solution anneal at ~1150–1180 °C and rapid quench.
1.4563 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 | ≤ 0.02 | 0.01 |
| Si | ≤ 0.3 | 0.2 |
| Mn | ≤ 2 | 1 |
| P | ≤ 0.02 | 0.02 |
| S | ≤ 0.01 | 0 |
| Cr | 26 – 28 | 27 |
| Ni | 30 – 32 | 31 |
| Mo | 6 – 7 | 6.5 |
| Cuimproves hot sulfuric acid resistance | 1 – 1.4 | 1.2 |
| Nraises PREN and strength | 0.15 – 0.25 | 0.2 |
| Febalance, ~31–33 % | balance |
What surface finishes work on 1.4563?
Pickle in HNO₃/HF or bead blast plus passivation to restore the passive film after welding; electropolishing gives the best surface for acid and pharma service.
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 1.4563 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
How much does 1.4563 cost?
1.4563 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.
1.4563 — frequently asked
What is 1.4563 used for?
1.4563 is typically used for sulfuric acid coolers and heat exchangers, phosphoric acid production, flue gas desulfurization and chemical process equipment. In short: upgrade from 904L; hot acid corrosion resistance; hardest of the family to machine.
What is the yield strength of 1.4563?
1.4563 has a typical yield strength of 330 MPa (47.9 ksi) and a tensile strength of 700 MPa (102 ksi) — weaker than 57% of stainless steel grades. Strength varies by condition: see the 3 listed tempers.
Is 1.4563 easy to machine?
Not especially — machinability is rated poor (22/100, worse than 95% of stainless steel grades). Very gummy and strongly work hardening — use rigid setups, positive-rake sharp carbide, low speed with heavy feed, never dwell, and flood high-pressure coolant.
Can 1.4563 be welded?
Yes — weldability is rated very good (75/100). Weld with GTAW/GMAW/SMAW using overalloyed Ni-base filler (ERNiCrMo-3/-4 or matching 31 filler), low heat input, interpass <150 °C, no preheat, backing gas on root; PWHT normally not required.
What surface finishes work on 1.4563?
Pickle in HNO₃/HF or bead blast plus passivation to restore the passive film after welding; electropolishing gives the best surface for acid and pharma service.
Can 1.4563 be formed, bent or molded?
Cold forms well but needs ~50 % more force than 316L and generous springback allowance; hot work 1150–900 °C followed by solution anneal at ~1150–1180 °C and rapid quench.
What is the maximum service temperature of 1.4563?
1.4563 is rated for continuous use to about 400°C (752 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 1.4563-AT and 1.4563-CW?
AT is the default condition — standard corrosion-service condition for plate, pipe, fittings and forgings — maximum corrosion resistance and ductility. CW: used where extra strength or springback is required in thin sections; corrosion resistance is essentially retained but ductility and formability drop sharply. Yield strength is 330 MPa in AT versus 700 MPa in CW.
How much does 1.4563 cost?
1.4563 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 10088-1/-2 Stainless steels — grades and technical delivery conditions (X1NiCrMoCu31-27-4, 1.4563) — CEN (2014)
- ASTM B625 / B649 / B622 (UNS N08031 plate, sheet, strip, bar and tube) — ASTM International (2023)
- VDM Alloy 31 / Nicrofer 3127 hMo material data sheet — VDM Metals (2020)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- Corrosion data for high-alloy austenitic stainless steels (CPT/CCT, sulfuric & phosphoric acid isocorrosion) — Outokumpu / Sandvik technical literature (2021)
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.