Steel DP450-HR vs DP450 +ZE
Steel · DP450 temper comparison
DP450-HR and DP450 +ZE are two conditions of the same steel grade, DP450: HR (hot rolled) versus +ZE (electrogalvanised). The chemistry is identical, so every difference below comes from the condition. DP450-HR is the stronger of the two: yield strength 330 MPa (47.9 ksi) against 300 MPa (43.5 ksi) for DP450 +ZE, about 10% more. In exchange, DP450 +ZE is the more ductile: elongation 29% versus 26% for DP450-HR.
DP450-HRChoose it when strength drives the design.
DP450 +ZEChoose it when the part is bent, formed or impact-loaded.
DP450-HR vs DP450 +ZE: 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
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 210 GPa30.5 Msi · Shear Modulus 80 GPa11.6 Msi · Bulk Modulus 165 GPa23.9 Msi · Poisson's Ratio 0.3
Physical
Density and transition temperatures.
Same in both: Density 7.85 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,480°C2,696 °F · Liquidus Temperature 1,520°C2,768 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 48 W/m·K27.7 BTU/hr·ft·°F · Specific Heat Capacity 470 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 12 µm/m·K6.7 µin/in·°F · Latent Heat of Fusion 270 J/g116 BTU/lb · Max Service Temperature (continuous) 200°C392 °F · Min Service Temperature -40°C-40 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Same in both: Electrical Resistivity 1.9×10⁻⁷ Ω·m7.48 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.65 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Same in both: Brazeability / Solderability 60 / 100 · Polishability 45 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 30 MJ/kg12,898 BTU/lb · Embodied Carbon (primary production) 2.3 kg CO₂/kg · Embodied Water 40 L/kg4.8 gal/lb · Typical Recycled Content 25%
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.
DP450-HR vs DP450 +ZE — frequently asked
Is DP450-HR stronger than DP450 +ZE?
Yes. DP450-HR has a typical yield strength of 330 MPa (47.9 ksi) against 300 MPa (43.5 ksi) for DP450 +ZE — about 10% more. Tensile strength is 490 MPa (71.1 ksi) vs 500 MPa (72.5 ksi).
Which condition does FabDigit quote by default, HR or +ZE?
CR is the default DP450 condition in the FabDigit quote flow (neither HR nor +ZE). 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.
When should I choose DP450-HR over DP450 +ZE?
Pick DP450-HR when strength drives the design. Pick DP450 +ZE when the part is bent, formed or impact-loaded.
Ready to make it?
Upload a CAD file and FabDigit prices the part in DP450-HR and DP450 +ZE 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.