Stainless Steel 1.4872
EN 1.4872
High-manganese, nitrogen-strengthened austenitic stainless with very high strength and heat resistance, primarily used for exhaust and engine valve applications where creep resistance at elevated temperature is required.
Reference datasheet — 1.4872 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 +P condition
1.4872 tempers and conditions
1.4872 is supplied in 4 conditions, soft to hard. +P 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 |
|---|---|---|---|---|---|---|
Solution annealed | Softest supply condition, used for hot/warm forming of valve blanks before ageing. | 400 | 810 | 35 | 22 HRC | — |
+PDefault Solution annealed and precipitation hardened | Standard delivered condition for finished exhaust valves — maximum hot strength and creep resistance. | 640 | 1,030 | 13 | 34 HRC | — |
+P + nitrided | Choose when valve stem wear against the guide and scuffing resistance govern. | 640 | 1,030 | 12 | 34 HRC | 1.9 % IACS |
Precipitation hardened, cold drawn / peeled-ground bar | Bar stock with close diameter tolerance and slightly higher strength for automatic-lathe valve machining. | 750 | 1,100 | 10 | 36 HRC | 1.9 % IACS |
What is 1.4872?
High-manganese, nitrogen-strengthened austenitic stainless with very high strength and heat resistance, primarily used for exhaust and engine valve applications where creep resistance at elevated temperature is required. 1.4872 has a density of 7.8 g/cm³ (0.282 lb/in³), heavier than 50% of stainless steel grades. It melts at 1,370°C (2,498 °F). 1.4872 has a yield strength of 640 MPa (92.8 ksi) and a tensile strength of 1,030 MPa (149 ksi) — stronger than 90% of stainless steel grades. Elongation at break is 13% and the elastic modulus is 200 GPa (29 Msi).
What is 1.4872 used for?
- engine exhaust valves
- high-temperature fasteners
- turbocharger components
- furnace hardware
Advantages
- High strength — 640 MPa (92.8 ksi), better than 90% of stainless steel grades
Limitations
- Difficult to machine — 22/100, worse than 95% of stainless steel grades
- Limited ductility — 13%, worse than 93% of stainless steel grades
- Difficult to weld — 30/100, worse than 88% of stainless steel grades
- Low electrical conductivity — 1.9 % IACS, worse than 84% of stainless steel grades
- Limited formability — 25/100, worse than 78% of stainless steel grades
1.4872 properties
Typical room-temperature values for 1.4872-+P; bars are the position among stainless steel grades.
Physical3
1.4872 has a density of 7.8 g/cm³ (0.282 lb/in³), heavier than 50% of stainless steel grades. It melts at 1,370°C (2,498 °F).
Mechanical14
1.4872 has a yield strength of 640 MPa (92.8 ksi) and a tensile strength of 1,030 MPa (149 ksi) — stronger than 90% of stainless steel grades. Elongation at break is 13% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
1.4872 is rated for continuous service to 800°C (1,472 °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 17.5 µm/m·K (9.72 µin/in·°F).
Electrical3
1.4872 conducts electricity at 1.9 % IACS, worse than 84% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (58/100), worse than 62% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4872 takes about 55 MJ of energy and emits 4.8 kg of CO₂ — more than 50% of stainless steel grades. Typical recycled content is 40%.
Manufacturability8
1.4872's machinability is poor (22/100, worse than 95% of stainless steel grades); weldability poor (30/100); formability poor (25/100).
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. 1.4872 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1.4872
Is 1.4872 easy to machine?
Tough, strongly work-hardening high-N austenite: use rigid setups, sharp carbide/ceramic inserts, low speed with heavy positive feed and generous coolant to avoid glazing.
Can 1.4872 be welded?
Not a general fusion-weld grade; valves are normally friction (inertia) welded to a martensitic stem, and any fusion repair needs preheat plus post-weld solution treatment to avoid carbide/hot cracking.
Can 1.4872 be formed, bent or molded?
Formed hot (≈1050–1150 °C) by extrusion/upset forging of valve blanks; cold forming is very limited due to high work-hardening rate.
1.4872 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 |
|---|---|---|
| C | 0.2 – 0.3 | 0.25 |
| Si | ≤ 0.5 | 0.3 |
| Mn | 8 – 10 | 9 |
| P | ≤ 0.05 | |
| S | ≤ 0.03 | |
| Cr | 24 – 26 | 25 |
| Ni | 6 – 8 | 7 |
| Nnitrogen strengthening, key to hot strength | 0.2 – 0.4 | 0.3 |
| Fe | balance |
What surface finishes work on 1.4872?
Stems are ground and gas/salt-bath nitrided or chrome-plated; heads may be aluminised or hardfaced with Stellite for seat wear.
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 1.4872 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- X25CrMnNiN25-9-7
How much does 1.4872 cost?
1.4872 is a premium-cost stainless steel ($$$), cheaper than about 51% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
1.4872 — frequently asked
What is 1.4872 used for?
1.4872 is typically used for engine exhaust valves, high-temperature fasteners, turbocharger components and furnace hardware. In short: high-nitrogen valve steel; 800 °C service strength; difficult to machine.
What is the yield strength of 1.4872?
1.4872 has a typical yield strength of 640 MPa (92.8 ksi) and a tensile strength of 1,030 MPa (149 ksi) — stronger than 90% of stainless steel grades. Strength varies by condition: see the 4 listed tempers.
Is 1.4872 easy to machine?
Not especially — machinability is rated poor (22/100, worse than 95% of stainless steel grades). Tough, strongly work-hardening high-N austenite: use rigid setups, sharp carbide/ceramic inserts, low speed with heavy positive feed and generous coolant to avoid glazing.
Can 1.4872 be welded?
Not readily — weldability is rated poor (30/100). Not a general fusion-weld grade; valves are normally friction (inertia) welded to a martensitic stem, and any fusion repair needs preheat plus post-weld solution treatment to avoid carbide/hot cracking.
What surface finishes work on 1.4872?
Stems are ground and gas/salt-bath nitrided or chrome-plated; heads may be aluminised or hardfaced with Stellite for seat wear.
Can 1.4872 be formed, bent or molded?
Formed hot (≈1050–1150 °C) by extrusion/upset forging of valve blanks; cold forming is very limited due to high work-hardening rate.
What is the maximum service temperature of 1.4872?
1.4872 is rated for continuous use to about 800°C (1,472 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does 1.4872 cost?
1.4872 is a premium-cost stainless steel ($$$), 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 10090 — Valve steels and alloys for internal combustion engines — CEN (1998)
- ASM Handbook Vol. 1: Properties and Selection — Irons, Steels, and High-Performance Alloys (valve steels) — ASM International (1990)
- Valve steel bar datasheets (X25CrMnNiN25-9-7 / 21-4N type) — Specialty valve-steel producers (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.