Steel 42CrMo4-CR vs 42CrMo4 Normalized
Steel · 42CrMo4 temper comparison
42CrMo4-CR and 42CrMo4 Normalized are two conditions of the same steel grade, 42CrMo4: CR (cold rolled) versus Normalized. The chemistry is identical, so every difference below comes from the condition. 42CrMo4 Normalized is the stronger of the two: yield strength 650 MPa (94.3 ksi) against 480 MPa (69.6 ksi) for 42CrMo4-CR, about 35% more; tensile strength follows at 1,000 MPa (145 ksi) vs 700 MPa (102 ksi). 42CrMo4 Normalized is the more ductile: elongation 18% versus 12% for 42CrMo4-CR, and 42CrMo4 Normalized is harder (300 HB vs 215 HB).
42CrMo4 NormalizedChoose it when strength drives the design, or when the part is bent, formed or impact-loaded.
42CrMo4-CR vs 42CrMo4 Normalized: 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.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell C
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 210 GPa30.5 Msi · Shear Modulus 80 GPa11.6 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29
Physical
Density and transition temperatures.
Same in both: Density 7.85 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,420°C2,588 °F · Liquidus Temperature 1,495°C2,723 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 42.6 W/m·K24.6 BTU/hr·ft·°F · Specific Heat Capacity 473 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 12.3 µm/m·K6.8 µin/in·°F · Latent Heat of Fusion 250 J/g107 BTU/lb · Max Service Temperature (continuous) 400°C752 °F · Min Service Temperature -40°C-40 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 7.8 % IACS · Electrical Resistivity 2.2×10⁻⁷ Ω·m8.66 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.6 V · Corrosion Resistance 12 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Polishability
Same in both: Brazeability / Solderability 50 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 30 MJ/kg12,898 BTU/lb · Embodied Carbon (primary production) 2.2 kg CO₂/kg · Embodied Water 60 L/kg7.2 gal/lb · Typical Recycled Content 30%
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.
42CrMo4-CR vs 42CrMo4 Normalized — frequently asked
Is 42CrMo4 Normalized stronger than 42CrMo4-CR?
Yes. 42CrMo4 Normalized has a typical yield strength of 650 MPa (94.3 ksi) against 480 MPa (69.6 ksi) for 42CrMo4-CR — about 35% more. Tensile strength is 1,000 MPa (145 ksi) vs 700 MPa (102 ksi).
Which condition does FabDigit quote by default, CR or Normalized?
HR is the default 42CrMo4 condition in the FabDigit quote flow (neither CR nor Normalized). The other condition is available on request or by drawing note — specify it in the material field or the part notes and the quote is priced for it.
Which is easier to machine, 42CrMo4-CR or 42CrMo4 Normalized?
42CrMo4-CR, by a small margin. Both rate fair for machinability — 53/100 against 45/100 for 42CrMo4 Normalized; for welding the order is 42CrMo4-CR first (fair, 40/100) then 42CrMo4 Normalized (fair, 35/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 42CrMo4-CR and 42CrMo4 Normalized 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.