Steel G24Mn6
EN 1.1118
G24Mn6 (1.1118) is a manganese-alloyed cast carbon steel that delivers higher strength and toughness than plain carbon cast grades, supplied in +QT1, +QT2, +QT3, +N or +A condition.
Reference datasheet — G24Mn6 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 +QT1 condition
G24Mn6 tempers and conditions
G24Mn6 is supplied in 5 conditions, soft to hard. +QT1 is the default FabDigit quotes; the values on this page are for it.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Softest condition, used to ease heavy rough machining or stress-relieve complex castings before final heat treatment. | 300 | 520 | 23 | 150 HB | 9.5 % IACS |
Normalized | Economical condition for less critical castings or as an intermediate state before machining and final Q&T. | 340 | 580 | 20 | 170 HB | — |
+QT1Default Quenched and tempered, lower strength / highest toughness class | Default supply condition: best combination of −40 °C impact toughness and weldability for thicker structural castings. | 440 | 660 | 18 | 195 HB | — |
Quenched and tempered, intermediate strength class | Pick when higher yield strength is needed for load-bearing machine castings while retaining useful notch toughness. | 540 | 760 | 14 | 20 HRC | — |
Quenched and tempered, high strength class | Highest-strength Q&T class, for thinner, well-hardenable sections where yield strength and wear dominate over toughness. | 640 | 860 | 11 | 25 HRC | — |
What is G24Mn6?
G24Mn6 (1.1118) is a manganese-alloyed cast carbon steel that delivers higher strength and toughness than plain carbon cast grades, supplied in +QT1, +QT2, +QT3, +N or +A condition. In the default condition it reaches 440 MPa yield, 660 MPa tensile, 18% elongation and about 195 HB (92 HRB), making it a standard choice for structural and mechanical castings that see moderate impact. Limits are a 350 °C service temperature, no corrosion resistance (score 11) and a carbon equivalent of 0.5–0.6 that requires preheat and post-weld tempering (weldability score 62). G17Mn5 is the alternative when weldability and low-temperature notch toughness outrank strength. G24Mn6 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,425°C (2,597 °F). G24Mn6 has a yield strength of 440 MPa (63.8 ksi) and a tensile strength of 660 MPa (95.7 ksi) — stronger than 50% of steel grades. Elongation at break is 18% and the elastic modulus is 210 GPa (30.5 Msi).
What is G24Mn6 used for?
- Railway castings
- Structural machine parts
- Couplers
Limitations
- Limited formability — 15/100, worse than 87% of steel grades
G24Mn6 properties
Typical room-temperature values for G24Mn6-+QT1; bars are the position among steel grades.
Physical3
G24Mn6 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,425°C (2,597 °F).
Mechanical16
G24Mn6 has a yield strength of 440 MPa (63.8 ksi) and a tensile strength of 660 MPa (95.7 ksi) — stronger than 50% of steel grades. Elongation at break is 18% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
G24Mn6 is rated for continuous service to 350°C (662 °F). It conducts heat at 45 W/m·K (26 BTU/hr·ft·°F), better than 66% of steel grades. Thermal expansion is 12.3 µm/m·K (6.83 µin/in·°F).
Electrical3
G24Mn6 conducts electricity at 9 % IACS, better than 71% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (11/100), worse than 73% of steel grades.
Sustainability4
Producing a kilogram of G24Mn6 takes about 24 MJ of energy and emits 2 kg of CO₂ — less than 97% of steel grades. Typical recycled content is 80%.
Manufacturability8
G24Mn6's machinability is good (55/100, better than 62% of steel grades); weldability good (62/100); 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. G24Mn6 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with G24Mn6
Is G24Mn6 easy to machine?
Machine after heat treatment with carbide tooling at moderate speed; expect abrasive cast skin on the first cut, so take a heavy enough first pass to get under scale and sand inclusions.
Can G24Mn6 be welded?
Weldable with low-hydrogen SMAW/GMAW consumables; CE ≈ 0.5–0.6 so preheat 150–250 °C, control interpass, and post-weld temper (or re-heat-treat) production and repair welds.
Can G24Mn6 be formed, bent or molded?
Sand or investment cast with adequate risering and chills — solidification shrinkage is high; normalize or re-austenitize to break up as-cast dendritic structure before final Q&T.
G24Mn6 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 |
|---|---|---|
| Cgrade-designating carbon level | 0.2 – 0.28 | 0.24 |
| Si | ≤ 0.6 | 0.4 |
| Mnmain strengthening/hardenability addition | 1.2 – 1.6 | 1.4 |
| P | ≤ 0.02 | 0.01 |
| S | ≤ 0.02 | 0.01 |
| Crresidual | ≤ 0.3 | 0.1 |
| Niresidual | ≤ 0.4 | 0.15 |
| Moresidual | ≤ 0.12 | 0.04 |
| Curesidual | ≤ 0.3 | 0.1 |
| Vresidual | ≤ 0.05 | 0.01 |
| Fe | balance |
What surface finishes work on G24Mn6?
Shot-blast to Sa 2½, then zinc-rich primer/paint, metallizing or phosphating; hard chrome or induction hardening is possible on machined bearing faces, anodizing is not applicable.
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 G24Mn6 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 1.1118
How much does G24Mn6 cost?
G24Mn6 is a standard-cost steel ($$), cheaper than about 71% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
G24Mn6 — frequently asked
What is G24Mn6 used for?
G24Mn6 is typically used for railway castings, structural machine parts and couplers. In short: tougher than plain carbon casts; quench-and-temper impact grade; preheat needed for welding.
What is the yield strength of G24Mn6?
G24Mn6 has a typical yield strength of 440 MPa (63.8 ksi) and a tensile strength of 660 MPa (95.7 ksi) — stronger than 50% of steel grades. Strength varies by condition: see the 5 listed tempers.
Is G24Mn6 easy to machine?
Reasonably — machinability is rated good (55/100, better than 62% of steel grades). Machine after heat treatment with carbide tooling at moderate speed; expect abrasive cast skin on the first cut, so take a heavy enough first pass to get under scale and sand inclusions.
Can G24Mn6 be welded?
Yes — weldability is rated good (62/100). Weldable with low-hydrogen SMAW/GMAW consumables; CE ≈ 0.5–0.6 so preheat 150–250 °C, control interpass, and post-weld temper (or re-heat-treat) production and repair welds.
What surface finishes work on G24Mn6?
Shot-blast to Sa 2½, then zinc-rich primer/paint, metallizing or phosphating; hard chrome or induction hardening is possible on machined bearing faces, anodizing is not applicable.
Can G24Mn6 be formed, bent or molded?
Sand or investment cast with adequate risering and chills — solidification shrinkage is high; normalize or re-austenitize to break up as-cast dendritic structure before final Q&T.
What is the maximum service temperature of G24Mn6?
G24Mn6 is rated for continuous use to about 350°C (662 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does G24Mn6 cost?
G24Mn6 is a standard-cost steel ($$), 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 10293 — Steel castings for general engineering uses — CEN (2015)
- DIN 17182 / DIN 17205 (superseded cast steel grades incl. GS-24Mn6) — DIN (1992)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys (Cast Steels) — ASM International (1990)
- Steel Castings Handbook, 6th ed. — SFSA / ASM International (1995)
- ISO 18265 — Metallic materials: conversion of hardness values — ISO (2013)
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.