Steel 24CrMo13-6
EN 24CrMo13-6
24CrMo13-6 (1.8516) is a chromium-molybdenum low-alloy nitriding steel supplied to EN 10085, used where a moderately hard nitrided case is combined with good core toughness.
Reference datasheet — 24CrMo13-6 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 +QT-100 condition
24CrMo13-6 tempers and conditions
24CrMo13-6 is supplied in 7 conditions, soft to hard. +QT-100 is the default FabDigit quotes; the values on this page are for it.
Compare all 7 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Delivery state for bar/forging stock that must be heavily machined or cold-worked before quenching and tempering. | 450 | 700 | 20 | 225 HB | — |
Normalized | Grain-refining state for forgings prior to final quench and temper; not a service condition. | 600 | 900 | 15 | 28 HRC | 6.4 % IACS |
Cold drawn | Bright-drawn small bar with close tolerance and good surface for parts machined with minimal stock removal. | 650 | 850 | 10 | 25 HRC | 6.4 % IACS |
+QT | Very large forgings (extruder barrels, big shafts) where through-hardening is limited by mass effect. | 660 | 890 | 15 | 27 HRC | — |
+QT | Heavy bar and forging sizes where reduced quench severity lowers guaranteed strength. | 760 | 980 | 14 | 31 HRC | — |
+QT-100Default +QT | Standard stock condition: oil/polymer quenched and tempered ~580–650 °C, machined to near-final size, then nitrided. | 870 | 1,080 | 13 | 34 HRC | — |
+QT + gas/plasma nitrided | Final service condition: nitrided 500–540 °C to a compound + diffusion layer for wear and scuffing resistance without distortion. | 870 | 1,080 | 12 | 64 HRC | — |
What is 24CrMo13-6?
24CrMo13-6 (1.8516) is a chromium-molybdenum low-alloy nitriding steel supplied to EN 10085, used where a moderately hard nitrided case is combined with good core toughness. In the default quenched-and-tempered condition it reaches 870 MPa yield, 1080 MPa tensile, 13 % elongation and about 330 HB (34 HRC) with service to 500 °C; forms include bar, forgings and pre-machined blanks in +A, +N, +QT and nitrided conditions. Corrosion resistance is negligible (score 15) and the steel is not intended for welding, with machinability around 40. 32CrAlMo7-10 is the alternative when a harder case is required. 24CrMo13-6 has a density of 7.8 g/cm³ (0.282 lb/in³), lighter than 87% of steel grades. It melts at 1,420°C (2,588 °F). 24CrMo13-6 has a yield strength of 870 MPa (126 ksi) and a tensile strength of 1,080 MPa (157 ksi) — stronger than 89% of steel grades. Elongation at break is 13% and the elastic modulus is 210 GPa (30.5 Msi).
What is 24CrMo13-6 used for?
- Nitrided shafts
- Gear components
- Machine tool parts
- Wear-resistant pins
Advantages
- High service temperature — 500°C (932 °F), better than 90% of steel grades
- High strength — 870 MPa (126 ksi), better than 89% of steel grades
- Polishes to a fine finish — 65/100, better than 78% of steel grades
Limitations
- Limited formability — 15/100, worse than 87% of steel grades
- Difficult to weld — 20/100, worse than 84% of steel grades
- Limited ductility — 13%, worse than 78% of steel grades
- Poor heat conductor — 34 W/m·K (19.6 BTU/hr·ft·°F), worse than 77% of steel grades
- Difficult to machine — 40/100, worse than 77% of steel grades
24CrMo13-6 properties
Typical room-temperature values for 24CrMo13-6-+QT-100; bars are the position among steel grades.
Physical3
24CrMo13-6 has a density of 7.8 g/cm³ (0.282 lb/in³), lighter than 87% of steel grades. It melts at 1,420°C (2,588 °F).
Mechanical16
24CrMo13-6 has a yield strength of 870 MPa (126 ksi) and a tensile strength of 1,080 MPa (157 ksi) — stronger than 89% of steel grades. Elongation at break is 13% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
24CrMo13-6 is rated for continuous service to 500°C (932 °F). It conducts heat at 34 W/m·K (19.6 BTU/hr·ft·°F), worse than 77% of steel grades. Thermal expansion is 11.8 µm/m·K (6.56 µin/in·°F).
Electrical2
24CrMo13-6 has an electrical resistivity of 2.7×10⁻⁷ Ω·m.
Chemical & Environmental2
Corrosion resistance is poor (15/100), better than 75% of steel grades.
Sustainability4
Producing a kilogram of 24CrMo13-6 takes about 34 MJ of energy and emits 2.4 kg of CO₂ — more than 82% of steel grades. Typical recycled content is 25%.
Manufacturability7
24CrMo13-6's machinability is fair (40/100, worse than 77% of steel grades); weldability poor (20/100); formability poor (15/100).
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 steel family
Yield strength against density for every steel grade FabDigit runs. 24CrMo13-6 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 24CrMo13-6
Is 24CrMo13-6 easy to machine?
Machine in +A for roughing or in +QT at ~330 HB with carbide at moderate speed and rigid setups; leave 0.05–0.15 mm grinding stock because nitriding grows the surface slightly.
Can 24CrMo13-6 be welded?
Essentially not intended for welding; if unavoidable use low-hydrogen or matching filler with 250–350 °C preheat and immediate 600–650 °C PWHT, and never weld after nitriding.
Can 24CrMo13-6 be formed, bent or molded?
Hot forge 1100–850 °C with slow cooling, then normalize and soft anneal; cold forming is impractical above the annealed state.
24CrMo13-6 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 – 0.28 | 0.24 |
| Si | ≤ 0.4 | 0.25 |
| Mn | 0.4 – 0.7 | 0.55 |
| P | ≤ 0.03 | |
| Smax; low-S variants for cleanliness | ≤ 0.04 | |
| Crprimary nitride former | 3 – 3.5 | 3.25 |
| Mohardenability + temper embrittlement resistance | 0.5 – 0.6 | 0.55 |
| Fe | balance |
What surface finishes work on 24CrMo13-6?
Gas or plasma nitride at 500–540 °C after a stress-relief at ~30 °C below the tempering temperature; alternatives are hard chrome, black oxide, or phosphating — anodizing does not apply.
Surface treatments FabDigit runs on 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).
Organic Coating
Black / Phosphate
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Steel 24CrMo13-6 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 1.8516
How much does 24CrMo13-6 cost?
24CrMo13-6 is a standard-cost steel ($$), cheaper than about 71% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
24CrMo13-6 — frequently asked
What is 24CrMo13-6 used for?
24CrMo13-6 is typically used for nitrided shafts, gear components, machine tool parts and wear-resistant pins. In short: tough-core nitriding steel; high core strength; low corrosion resistance.
What is the yield strength of 24CrMo13-6?
24CrMo13-6 has a typical yield strength of 870 MPa (126 ksi) and a tensile strength of 1,080 MPa (157 ksi) — stronger than 89% of steel grades. Strength varies by condition: see the 7 listed tempers.
Is 24CrMo13-6 easy to machine?
Not especially — machinability is rated fair (40/100, worse than 77% of steel grades). Machine in +A for roughing or in +QT at ~330 HB with carbide at moderate speed and rigid setups; leave 0.05–0.15 mm grinding stock because nitriding grows the surface slightly.
Can 24CrMo13-6 be welded?
Not readily — weldability is rated poor (20/100). Essentially not intended for welding; if unavoidable use low-hydrogen or matching filler with 250–350 °C preheat and immediate 600–650 °C PWHT, and never weld after nitriding.
What surface finishes work on 24CrMo13-6?
Gas or plasma nitride at 500–540 °C after a stress-relief at ~30 °C below the tempering temperature; alternatives are hard chrome, black oxide, or phosphating — anodizing does not apply.
Can 24CrMo13-6 be formed, bent or molded?
Hot forge 1100–850 °C with slow cooling, then normalize and soft anneal; cold forming is impractical above the annealed state.
What is the maximum service temperature of 24CrMo13-6?
24CrMo13-6 is rated for continuous use to about 500°C (932 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does 24CrMo13-6 cost?
24CrMo13-6 is a standard-cost steel ($$), cheaper than about 71% 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 10085 — Nitriding steels — Technical delivery conditions — CEN (2001)
- EN 10250-3 — Open die steel forgings, alloy special steels — CEN (1999)
- EN ISO 18265 — Conversion of hardness values — ISO (2013)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels — ASM International (1990)
- ASM Handbook Vol.4A — Steel Heat Treating Fundamentals (nitriding) — ASM International (2013)
- Nitriding steel bar datasheets (1.8516 / 1.8519 class) — European special steel producers (2023)
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.