Steel A36 Galvanized-CD vs A36 Galvanized-HR
Steel · A36 Galvanized temper comparison
A36 Galvanized-CD and A36 Galvanized-HR are two conditions of the same steel grade, A36 Galvanized: CD (cold drawn) versus HR (hot rolled). The chemistry is identical, so every difference below comes from the condition. A36 Galvanized-CD is the stronger of the two: yield strength 450 MPa (65.3 ksi) against 275 MPa (39.9 ksi) for A36 Galvanized-HR, about 64% more; tensile strength follows at 550 MPa (79.8 ksi) vs 450 MPa (65.3 ksi). In exchange, A36 Galvanized-HR is the more ductile: elongation 23% versus 12% for A36 Galvanized-CD, and A36 Galvanized-CD is harder (160 HB vs 120 HB).
A36 Galvanized-CDChoose it when strength drives the design.
A36 Galvanized-HRChoose it when the part is bent, formed or impact-loaded.
A36 Galvanized-CD vs A36 Galvanized-HR: 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.
A36 Galvanized-CDA36 Galvanized-HR
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Same in both: Elastic (Young's) Modulus 200 GPa29 Msi · Shear Modulus 79 GPa11.5 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29 · Compressive Strength 275 MPa39.9 ksi · Shear Strength 275 MPa39.9 ksi · Fracture Toughness (K_IC) 55 MPa·√m50.1 ksi·√in · Hardness, Vickers 125 HV
Physical
Density and transition temperatures.
Same in both: Density 7.85 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,425°C2,597 °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 51.9 W/m·K30 BTU/hr·ft·°F · Specific Heat Capacity 486 J/kg·K0.12 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 11.9 µm/m·K6.6 µin/in·°F · Latent Heat of Fusion 247 J/g106 BTU/lb · Max Service Temperature (continuous) 200°C392 °F · Min Service Temperature -30°C-22 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 10.5 % IACS · Electrical Resistivity 1.6×10⁻⁷ Ω·m6.3 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -1.03 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Same in both: Machinability 62 / 100 · Brazeability / Solderability 55 / 100 · Polishability 25 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 32 MJ/kg13,758 BTU/lb · Embodied Carbon (primary production) 2.4 kg CO₂/kg · Embodied Water 45 L/kg5.4 gal/lb · Typical Recycled Content 35%
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.
A36 Galvanized-CD vs A36 Galvanized-HR — frequently asked
Is A36 Galvanized-CD stronger than A36 Galvanized-HR?
Yes. A36 Galvanized-CD has a typical yield strength of 450 MPa (65.3 ksi) against 275 MPa (39.9 ksi) for A36 Galvanized-HR — about 64% more. Tensile strength is 550 MPa (79.8 ksi) vs 450 MPa (65.3 ksi).
Which condition does FabDigit quote by default, CD or HR?
HR is the default A36 Galvanized condition in the FabDigit quote flow. 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 A36 Galvanized-CD over A36 Galvanized-HR?
Pick A36 Galvanized-CD when strength drives the design. Pick A36 Galvanized-HR when the part is bent, formed or impact-loaded.
Ready to make it?
Upload a CAD file and FabDigit prices the part in A36 Galvanized-CD and A36 Galvanized-HR 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.