Steel C56E2 +A vs C56E2 +C
Steel · C56E2 temper comparison
C56E2 +A and C56E2 +C are two conditions of the same steel grade, C56E2: +A (annealed) versus +C (cold drawn). The chemistry is identical, so every difference below comes from the condition. C56E2 +C is the stronger of the two: yield strength 860 MPa (125 ksi) against 350 MPa (50.8 ksi) for C56E2 +A, about 146% more; tensile strength follows at 1,000 MPa (145 ksi) vs 620 MPa (89.9 ksi). In exchange, C56E2 +A is the more ductile: elongation 18% versus 3% for C56E2 +C, and C56E2 +C is harder (300 HB vs 180 HB). C56E2 +A runs hotter in service (300°C vs 200°C continuous). On the shop floor, C56E2 +A machines more easily (fair vs poor) and C56E2 +A welds better (25 vs 15 out of 100).
C56E2 +AChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
C56E2 +CChoose it when strength drives the design.
C56E2 +A vs C56E2 +C: 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.
Elastic (Young's) Modulus
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, Vickers
Same in both: Shear Modulus 80 GPa11.6 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29 · Hardness, Rockwell B 89 HRB
Physical
Density and transition temperatures.
Same in both: Density 7.84 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,420°C2,588 °F · Liquidus Temperature 1,480°C2,696 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 470 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 11.7 µm/m·K6.5 µin/in·°F · Latent Heat of Fusion 260 J/g112 BTU/lb · 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) -0.6 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: Castability 40 / 100 · Brazeability / Solderability 60 / 100 · Polishability 65 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 25 MJ/kg10,748 BTU/lb · Embodied Carbon (primary production) 2 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.
C56E2 +A vs C56E2 +C — frequently asked
Is C56E2 +C stronger than C56E2 +A?
Yes. C56E2 +C has a typical yield strength of 860 MPa (125 ksi) against 350 MPa (50.8 ksi) for C56E2 +A — about 146% more. Tensile strength is 1,000 MPa (145 ksi) vs 620 MPa (89.9 ksi).
Which condition does FabDigit quote by default, +A or +C?
+A is the default C56E2 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.
Which is easier to machine, C56E2 +A or C56E2 +C?
C56E2 +A. Its machinability rates fair (45/100) against poor (30/100) for C56E2 +C; for welding the order is C56E2 +A first (poor, 25/100) then C56E2 +C (poor, 15/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in C56E2 +A and C56E2 +C 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.