Steel 5CrMnMo vs 8407
Steel · grade comparison
Steel 5CrMnMo and 8407 are both steel grades. Both yield at about 500 MPa — strength does not separate them. 5CrMnMo is harder — 220 HB against 180 HB for 8407 — which matters for wear surfaces and threads. 8407 runs hotter in service (540°C vs 400°C continuous) and 5CrMnMo conducts heat better (34 W/m·K vs 25.5 W/m·K). On the shop floor, 8407 welds better (45 vs 35 out of 100) and 5CrMnMo sits in a lower cost tier (budget, $) than 8407 (premium, $$$).
5CrMnMoChoose it when surface hardness matters, or when cost is the deciding factor.
8407Choose it when the part sees heat, or when it will be welded.
5CrMnMo vs 8407: 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.
Bulk Modulus
Poisson's Ratio
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Reduction in Area
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Rockwell C
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 210 GPa30.5 Msi · Shear Modulus 81 GPa11.7 Msi · Elongation at Break 18%
Physical
Density and transition temperatures.
Melting Point (Solidus)
Liquidus Temperature
Same in both: Density 7.8 g/cm³0.28 lb/in³
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Thermal Expansion (CTE, 20–100 °C)
Max Service Temperature (continuous)
Min Service Temperature
Same in both: Specific Heat Capacity 460 J/kg·K0.11 BTU/lb·°F · Latent Heat of Fusion 250 J/g107 BTU/lb
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Galvanic Potential (seawater, vs SCE)
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Weldability
Formability (cold)
Castability
Brazeability / Solderability
Polishability
Same in both: Machinability 55 / 100 · Machinability Rating (AISI 1212 = 100 %) 55%
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Same in both: Typical Recycled Content 45%
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Modulus of Resilience
Thermal Diffusivity
Thermal Shock Resistance Index
Same in both: Specific Stiffness (E / density) 26.9 MN·m/kg
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 | 5CrMnMo | 8407 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $ Budget | $$$ Premium |
| 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.
5CrMnMo vs 8407 — frequently asked
What is the difference between 5CrMnMo and 8407?
Steel 5CrMnMo and 8407 are both steel grades. Both yield at about 500 MPa — strength does not separate them. 5CrMnMo is harder — 220 HB against 180 HB for 8407 — which matters for wear surfaces and threads.
Which is cheaper, 5CrMnMo or 8407?
5CrMnMo is the lower-cost material: it sits in the budget tier ($) while 8407 is premium ($$$). 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, 5CrMnMo or 8407?
8407. Its weldability rates fair (45/100) against fair (35/100) for 5CrMnMo.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 5CrMnMo and 8407 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.