Steel 1215 Annealed vs 1215-CR
Steel · 1215 temper comparison
1215 Annealed and 1215-CR are two conditions of the same steel grade, 1215: Annealed versus CR (cold rolled). The chemistry is identical, so every difference below comes from the condition. 1215-CR is the stronger of the two: yield strength 400 MPa (58 ksi) against 240 MPa (34.8 ksi) for 1215 Annealed, about 67% more; tensile strength follows at 520 MPa (75.4 ksi) vs 390 MPa (56.6 ksi). In exchange, 1215 Annealed is the more ductile: elongation 28% versus 12% for 1215-CR, and 1215-CR is harder (163 HB vs 111 HB).
1215 AnnealedChoose it when the part is bent, formed or impact-loaded.
1215-CRChoose it when strength drives the design.
1215 Annealed vs 1215-CR: 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)
Hardness, Brinell
Hardness, Rockwell B
Same in both: Elastic (Young's) Modulus 200 GPa29 Msi · Shear Modulus 80 GPa11.6 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29
Physical
Density and transition temperatures.
Same in both: Density 7.87 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,420°C2,588 °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) 11.9 µm/m·K6.6 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.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.61 V · Corrosion Resistance 8 / 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 55 / 100 · Polishability 40 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 26 MJ/kg11,178 BTU/lb · Embodied Carbon (primary production) 2 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.
1215 Annealed vs 1215-CR — frequently asked
Is 1215-CR stronger than 1215 Annealed?
Yes. 1215-CR has a typical yield strength of 400 MPa (58 ksi) against 240 MPa (34.8 ksi) for 1215 Annealed — about 67% more. Tensile strength is 520 MPa (75.4 ksi) vs 390 MPa (56.6 ksi).
Which condition does FabDigit quote by default, Annealed or CR?
HR is the default 1215 condition in the FabDigit quote flow (neither Annealed nor CR). 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, 1215 Annealed or 1215-CR?
1215-CR. Its machinability rates excellent (90/100) against very good (82/100) for 1215 Annealed; for welding the order is 1215 Annealed first (poor, 25/100) then 1215-CR (poor, 20/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 1215 Annealed and 1215-CR 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.