Steel 31CrMo12 vs 41CrAlMo7-10
Steel · grade comparison
Steel 31CrMo12 and 41CrAlMo7-10 are both steel grades. 31CrMo12 is the stronger of the two: yield strength 900 MPa (131 ksi) against 800 MPa (116 ksi) for 41CrAlMo7-10, about 13% more. 31CrMo12 is harder — 340 HB against 320 HB for 41CrAlMo7-10 — which matters for wear surfaces and threads. On the shop floor, 31CrMo12 welds better (25 vs 15 out of 100) and 41CrAlMo7-10 sits in a lower cost tier (budget, $) than 31CrMo12 (standard, $$).
31CrMo12Choose it when strength drives the design, or when surface hardness matters.
41CrAlMo7-10Choose it when cost is the deciding factor.
31CrMo12 vs 41CrAlMo7-10: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all steel grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
How to read these bars
- One bar per material. A full bar is the highest value among all steel grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Shear Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Rockwell C
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 210 GPa30.5 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29 · Reduction in Area 50% · Fracture Toughness (K_IC) 70 MPa·√m63.7 ksi·√in · Charpy V-Notch Impact (RT) 45 J33.2 ft·lbf
Physical
Density and transition temperatures.
Density
Same in both: Melting Point (Solidus) 1,420°C2,588 °F · Liquidus Temperature 1,490°C2,714 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Expansion (CTE, 20–100 °C)
Latent Heat of Fusion
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 34 W/m·K19.6 BTU/hr·ft·°F · Specific Heat Capacity 460 J/kg·K0.11 BTU/lb·°F · Min Service Temperature -40°C-40 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.6 V · Corrosion Resistance 15 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Weldability
Formability (cold)
Brazeability / Solderability
Polishability
Castability
Same in both: Machinability 40 / 100 · Machinability Rating (AISI 1212 = 100 %) 45%
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Same in both: Embodied Carbon (primary production) 2.3 kg CO₂/kg · Embodied Water 60 L/kg7.2 gal/lb · Typical Recycled Content 30%
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Thermal Diffusivity
Same in both: Thermal Shock Resistance Index 15
Strength versus weight
Yield strength against density for every steel grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Manufacturing and finishing
| Capability | 31CrMo12 | 41CrAlMo7-10 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$ Standard | $ Budget |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both take the same 9 finishes: Copper Plating, Electroless Nickel (EN), Epoxy Coating, Gold Plating, Hard Chrome Plating, Manganese Phosphate, Plasma Spray, Silver Plating, Zinc Phosphate.
31CrMo12 vs 41CrAlMo7-10 — frequently asked
Is 31CrMo12 stronger than 41CrAlMo7-10?
Yes. 31CrMo12 has a typical yield strength of 900 MPa (131 ksi) against 800 MPa (116 ksi) for 41CrAlMo7-10 — about 13% more. Tensile strength is 1,100 MPa (160 ksi) vs 1,050 MPa (152 ksi).
Which is cheaper, 31CrMo12 or 41CrAlMo7-10?
41CrAlMo7-10 is the lower-cost material: it sits in the budget tier ($) while 31CrMo12 is standard ($$). Part price depends far more on geometry, tolerance and quantity than on raw stock — upload a CAD file for a live quote.
Which welds better, 31CrMo12 or 41CrAlMo7-10?
31CrMo12. Its weldability rates poor (25/100) against poor (15/100) for 41CrAlMo7-10.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 31CrMo12 and 41CrAlMo7-10 side by side — material, machining time, tolerance and finish in one quote. Certified material data ships with the order on request.
Typical handbook values for the conditions named above, normalised for comparison. Hardness on non-Brinell scales is converted approximately for charting only. Request certified data with your order for design-critical properties.