Stainless Steel 1.4592
EN 1.4592 · UNS S44735 · also AL29-4C
1.4592 (X2CrMoTi29-4, UNS S44735, AL 29-4C) is a superferritic 29Cr-4Mo titanium-stabilized stainless steel with very low interstitial carbon and nitrogen.
Reference datasheet — 1.4592 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 Annealed condition
1.4592 tempers and conditions
1.4592 is supplied in 2 conditions, soft to hard. Annealed is the default FabDigit quotes; the values on this page are for it.
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
AnnealedDefault solution/mill annealed and pickled (sheet, strip, plate, tube) | Standard mill condition for all product forms; maximum corrosion resistance and formability. | 480 | 600 | 25 | 185 HB | 2.3 % IACS |
Quarter hard | Lightly temper-rolled strip when higher yield/flatness is needed and forming demands are modest. | 620 | 720 | 12 | 21 HRC | 2.3 % IACS |
Supply forms, finishes and certifications
Ways 1.4592 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
Welded Tube Annealed | Welded tube | Supply form |
2B | Cold rolled, annealed, pickled, skin-passed sheet | Surface finish |
BA | Bright annealed cold-rolled sheet/strip | Surface finish |
HRAP | Hot Rolled Annealed Pickled plate | Surface finish |
What is 1.4592?
1.4592 (X2CrMoTi29-4, UNS S44735, AL 29-4C) is a superferritic 29Cr-4Mo titanium-stabilized stainless steel with very low interstitial carbon and nitrogen. Engineers use it for tube and thin-gauge sheet in aggressive chloride service, where it resists pitting and chloride stress-corrosion cracking far better than 316L (corrosion score 88); annealed material runs about 480 MPa yield, 600 MPa tensile, 25% elongation and 185 HB in annealed, 2B, BA, HRAP, welded-tube-annealed and 1/4 hard conditions. Service is capped at 300 °C to avoid 475 °C embrittlement, formability (score 60) and thick-section toughness are limited, and cost and availability are worse than 316L or duplex 2205. 1.4592 has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,450°C (2,642 °F). 1.4592 has a yield strength of 480 MPa (69.6 ksi) and a tensile strength of 600 MPa (87 ksi) — stronger than 75% of stainless steel grades. Elongation at break is 25% and the elastic modulus is 200 GPa (29 Msi).
What is 1.4592 used for?
- seawater heat exchangers
- flue gas desulfurization equipment
- chemical processing tubing
- condenser tubes
Advantages
- Good corrosion resistance — 88/100, better than 97% of stainless steel grades
- Low embodied carbon — 3.6 kg CO₂/kg, better than 83% of stainless steel grades
- High strength — 480 MPa (69.6 ksi), better than 75% of stainless steel grades
Limitations
- Limited service temperature — 300°C (572 °F), worse than 90% of stainless steel grades
1.4592 properties
Typical room-temperature values for 1.4592-Annealed; bars are the position among stainless steel grades.
Physical3
1.4592 has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,450°C (2,642 °F).
Mechanical15
1.4592 has a yield strength of 480 MPa (69.6 ksi) and a tensile strength of 600 MPa (87 ksi) — stronger than 75% of stainless steel grades. Elongation at break is 25% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
1.4592 is rated for continuous service to 300°C (572 °F). It conducts heat at 17 W/m·K (9.82 BTU/hr·ft·°F), better than 71% of stainless steel grades. Thermal expansion is 10.2 µm/m·K (5.67 µin/in·°F).
Electrical3
1.4592 conducts electricity at 2.3 % IACS, better than 55% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is excellent (88/100), better than 97% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4592 takes about 52 MJ of energy and emits 3.6 kg of CO₂ — less than 76% of stainless steel grades. Typical recycled content is 60%.
Manufacturability6
1.4592's machinability is fair (40/100, better than 72% of stainless steel grades); weldability good (60/100); formability good (60/100).
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. 1.4592 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1.4592
Is 1.4592 easy to machine?
Machine like a tough ferritic-Mo stainless: rigid setups, sharp positive-rake carbide, moderate speed and heavy positive feed to cut under the work-hardened skin, flood coolant.
Can 1.4592 be welded?
GTAW/plasma autogenous or with matched/Ni-base (alloy 625/C-22) filler; keep heat input and interpass low, use high-purity argon with full back-purge, never PWHT above ~400 °C.
Can 1.4592 be formed, bent or molded?
Cold forms well in thin gauges with generous bend radii (~1–2 t) and higher springback than austenitics; hot work 1000–1150 °C followed by annealing at ~1010–1065 °C and rapid cooling.
1.4592 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 |
|---|---|---|
| Cvery low interstitial; EN 1.4592 ≤0.025 | ≤ 0.03 | 0.02 |
| Mn | ≤ 1 | 0.3 |
| Si | ≤ 1 | 0.4 |
| P | ≤ 0.04 | 0.02 |
| S | ≤ 0.03 | 0 |
| Cr | 28 – 30 | 29 |
| Mo | 3.6 – 4.2 | 4 |
| Ni | ≤ 1 | 0.3 |
| N | ≤ 0.05 | 0.02 |
| Ti+Nbstabilizer, min 6×(C+N); 1.4592 is Ti-stabilized | 0.2 – 1 | 0.5 |
| Cu | ≤ 0.5 | 0.05 |
| Fe | balance |
What surface finishes work on 1.4592?
Pickle/passivate after welding or grinding to restore the passive film; polishes to a bright finish and stays clean in seawater — no plating or anodizing needed.
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 1.4592 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- S44735
- EN / DIN / Werkstoff-Nr.
- X2CrMoTi29-4
- Trade names
- AL29-4C
How much does 1.4592 cost?
1.4592 is a high-cost stainless steel ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
1.4592 — frequently asked
What is 1.4592 used for?
1.4592 is typically used for seawater heat exchangers, flue gas desulfurization equipment, chemical processing tubing and condenser tubes. In short: top chloride-resistant ferritic; seawater condenser tube grade; limited to 300 °C.
What is the yield strength of 1.4592?
1.4592 has a typical yield strength of 480 MPa (69.6 ksi) and a tensile strength of 600 MPa (87 ksi) — stronger than 75% of stainless steel grades. Strength varies by condition: see the 2 listed tempers.
Is 1.4592 easy to machine?
Not especially — machinability is rated fair (40/100, better than 72% of stainless steel grades). Machine like a tough ferritic-Mo stainless: rigid setups, sharp positive-rake carbide, moderate speed and heavy positive feed to cut under the work-hardened skin, flood coolant.
Can 1.4592 be welded?
Yes — weldability is rated good (60/100). GTAW/plasma autogenous or with matched/Ni-base (alloy 625/C-22) filler; keep heat input and interpass low, use high-purity argon with full back-purge, never PWHT above ~400 °C.
What surface finishes work on 1.4592?
Pickle/passivate after welding or grinding to restore the passive film; polishes to a bright finish and stays clean in seawater — no plating or anodizing needed.
Can 1.4592 be formed, bent or molded?
Cold forms well in thin gauges with generous bend radii (~1–2 t) and higher springback than austenitics; hot work 1000–1150 °C followed by annealing at ~1010–1065 °C and rapid cooling.
What is the maximum service temperature of 1.4592?
1.4592 is rated for continuous use to about 300°C (572 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does 1.4592 cost?
1.4592 is a high-cost stainless steel ($$$$), 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
- ASTM A240/A240M — Chromium and Chromium-Nickel Stainless Steel Plate, Sheet and Strip (UNS S44735) — ASTM International (2023)
- ASTM A268/A268M — Seamless and Welded Ferritic Stainless Steel Tubing — ASTM International (2022)
- EN 10088-2 — Stainless steels, Part 2: Technical delivery conditions for sheet/plate (X2CrMoTi29-4, 1.4592) — CEN (2014)
- AL 29-4C Superferritic Stainless Steel Technical Data — ATI (Allegheny Technologies) (2015)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- ASM Specialty Handbook: Stainless Steels — ASM International (1994)
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.