Stainless Steel 1.4592-1/4 Hard
Supply condition
EN 1.4592 · UNS S44735 · also AL29-4C
1/4 Hard = quarter hard
Lightly temper-rolled strip when higher yield/flatness is needed and forming demands are modest.
Values for the 1/4 Hard condition
Other 1.4592 tempers and conditions
1.4592 is listed in 2 conditions; see the grade overview at 1.4592.
- Annealed
- 1/4 Hard
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 |
1/4 HardThis page 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 |
What is 1.4592-1/4 Hard?
1.4592-1/4 Hard is 1.4592 supplied in the 1/4 Hard condition — lightly temper-rolled strip when higher yield/flatness is needed and forming demands are modest. 1.4592-1/4 Hard has a yield strength of 620 MPa (89.9 ksi) and a tensile strength of 720 MPa (104 ksi) — stronger than 88% of stainless steel grades. Elongation at break is 12% and the elastic modulus is 200 GPa (29 Msi). 1.4592-1/4 Hard 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). Annealed is the default condition FabDigit quotes; 1/4 Hard is available on request or by drawing note.
Advantages
- Good corrosion resistance — 86/100, better than 94% of stainless steel grades
- High strength — 620 MPa (89.9 ksi), better than 88% of stainless steel grades
- Low embodied carbon — 3.6 kg CO₂/kg, better than 83% of stainless steel grades
Limitations
- Limited service temperature — 250°C (482 °F), worse than 99% of stainless steel grades
- Limited ductility — 12%, worse than 95% of stainless steel grades
1.4592-1/4 Hard properties
Typical room-temperature values for 1.4592-1/4 Hard; 22 are specific to this condition. Other listed values are 1.4592 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
1.4592-1/4 Hard 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
1.4592-1/4 Hard has a yield strength of 620 MPa (89.9 ksi) and a tensile strength of 720 MPa (104 ksi) — stronger than 88% of stainless steel grades. Elongation at break is 12% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
1.4592-1/4 Hard is rated for continuous service to 250°C (482 °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
1.4592-1/4 Hard conducts electricity at 2.3 % IACS, better than 55% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is excellent (86/100), better than 94% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4592-1/4 Hard 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
1.4592-1/4 Hard's machinability is fair (35/100, better than 51% of stainless steel grades); weldability good (55/100); formability fair (40/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1.4592-1/4 Hard
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.
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.
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 | — |
1.4592-1/4 Hard — frequently asked
What is 1.4592-1/4 Hard used for?
1.4592-1/4 Hard 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 1.4592-1/4 Hard?
1.4592-1/4 Hard has a typical yield strength of 620 MPa (89.9 ksi) and a tensile strength of 720 MPa (104 ksi) — stronger than 88% of stainless steel grades. Strength varies by condition: see the 2 listed tempers.
Is 1.4592-1/4 Hard easy to machine?
Not especially — machinability is rated fair (35/100, better than 51% 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 1.4592-1/4 Hard be welded?
Yes — weldability is rated good (55/100). 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 1.4592-1/4 Hard?
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 1.4592-1/4 Hard 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 1.4592-1/4 Hard?
1.4592-1/4 Hard is rated for continuous use to about 250°C (482 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.