Steel A536 60-40-18-AC vs A536 60-40-18-ANN
Steel · A536 60-40-18 temper comparison
A536 60-40-18-AC and A536 60-40-18-ANN are two conditions of the same steel grade, A536 60-40-18: AC (spheroidize annealed) versus ANN (annealed). The chemistry is identical, so every difference below comes from the condition. Both yield at about 315 MPa — the mechanical properties are the same, and the difference is in how the stock is processed and what it is certified to (spheroidize annealed versus annealed). A536 60-40-18-ANN is the more ductile: elongation 23% versus 19% for A536 60-40-18-AC, and A536 60-40-18-AC is harder (163 HB vs 150 HB).
A536 60-40-18-ANNChoose it when the part is bent, formed or impact-loaded.
A536 60-40-18-AC vs A536 60-40-18-ANN: 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.
A536 60-40-18-ACA536 60-40-18-ANN
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
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 169 GPa24.5 Msi · Shear Modulus 65 GPa9.4 Msi · Bulk Modulus 135 GPa19.6 Msi · Poisson's Ratio 0.28 · Fatigue Strength (Endurance Limit) 200 MPa29 ksi
Physical
Density and transition temperatures.
Same in both: Density 7.1 g/cm³0.26 lb/in³ · Melting Point (Solidus) 1,140°C2,084 °F · Liquidus Temperature 1,160°C2,120 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 36 W/m·K20.8 BTU/hr·ft·°F · Specific Heat Capacity 460 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 220 J/g94.6 BTU/lb · Max Service Temperature (continuous) 350°C662 °F · Min Service Temperature -20°C-4 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.65 V · Corrosion Resistance 18 / 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: Castability 88 / 100 · Brazeability / Solderability 40 / 100 · Polishability 55 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 21 MJ/kg9,028 BTU/lb · Embodied Carbon (primary production) 1.9 kg CO₂/kg · Embodied Water 45 L/kg5.4 gal/lb · Typical Recycled Content 80%
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.
A536 60-40-18-AC vs A536 60-40-18-ANN — frequently asked
What is the difference between A536 60-40-18-AC and A536 60-40-18-ANN?
A536 60-40-18-AC and A536 60-40-18-ANN are two conditions of the same steel grade, A536 60-40-18: AC (spheroidize annealed) versus ANN (annealed). The chemistry is identical, so every difference below comes from the condition. Both yield at about 315 MPa — the mechanical properties are the same, and the difference is in how the stock is processed and what it is certified to (spheroidize annealed versus annealed).
Which condition does FabDigit quote by default, AC or ANN?
ANN is the default A536 60-40-18 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 A536 60-40-18-AC over A536 60-40-18-ANN?
Pick A536 60-40-18-ANN when the part is bent, formed or impact-loaded.
Ready to make it?
Upload a CAD file and FabDigit prices the part in A536 60-40-18-AC and A536 60-40-18-ANN 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.