Steel 1018 Annealed vs 1018-CD
Steel · 1018 temper comparison
1018 Annealed and 1018-CD are two conditions of the same steel grade, 1018: Annealed versus CD (cold drawn). The chemistry is identical, so every difference below comes from the condition. 1018-CD is the stronger of the two: yield strength 370 MPa (53.7 ksi) against 215 MPa (31.2 ksi) for 1018 Annealed, about 72% more; tensile strength follows at 440 MPa (63.8 ksi) vs 385 MPa (55.8 ksi). In exchange, 1018 Annealed is the more ductile: elongation 33% versus 15% for 1018-CD, and 1018-CD is harder (126 HB vs 111 HB). On the shop floor, 1018-CD machines more easily (good vs fair).
1018 AnnealedChoose it when the part is bent, formed or impact-loaded.
1018-CDChoose it when strength drives the design, or when the part is machined in volume.
1018 Annealed vs 1018-CD: 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
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 205 GPa29.7 Msi · Shear Modulus 80 GPa11.6 Msi · Bulk Modulus 140 GPa20.3 Msi · Poisson's Ratio 0.29 · Compressive Strength 220 MPa31.9 ksi · Fracture Toughness (K_IC) 110 MPa·√m100 ksi·√in
Physical
Density and transition temperatures.
Same in both: Density 7.87 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,425°C2,597 °F · Liquidus Temperature 1,510°C2,750 °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) 11.7 µm/m·K6.5 µin/in·°F · Latent Heat of Fusion 247 J/g106 BTU/lb · Max Service Temperature (continuous) 400°C752 °F · Min Service Temperature -20°C-4 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 10.8 % IACS · Electrical Resistivity 1.6×10⁻⁷ Ω·m6.3 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.61 V · Corrosion Resistance 10 / 100
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 75 / 100 · Polishability 50 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 25 MJ/kg10,748 BTU/lb · Embodied Carbon (primary production) 1.9 kg CO₂/kg · Embodied Water 45 L/kg5.4 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.
1018 Annealed vs 1018-CD — frequently asked
Is 1018-CD stronger than 1018 Annealed?
Yes. 1018-CD has a typical yield strength of 370 MPa (53.7 ksi) against 215 MPa (31.2 ksi) for 1018 Annealed — about 72% more. Tensile strength is 440 MPa (63.8 ksi) vs 385 MPa (55.8 ksi).
Which condition does FabDigit quote by default, Annealed or CD?
HR is the default 1018 condition in the FabDigit quote flow (neither Annealed nor CD). 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, 1018 Annealed or 1018-CD?
1018-CD. Its machinability rates good (66/100) against fair (54/100) for 1018 Annealed.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 1018 Annealed and 1018-CD 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.