Steel 1215 Annealed vs 1215 Carburized
Steel · 1215 temper comparison
1215 Annealed and 1215 Carburized are two conditions of the same steel grade, 1215: Annealed versus Carburized (carburized and hardened). The chemistry is identical, so every difference below comes from the condition. 1215 Carburized is the stronger of the two: yield strength 380 MPa (55.1 ksi) against 240 MPa (34.8 ksi) for 1215 Annealed, about 58% more; tensile strength follows at 560 MPa (81.2 ksi) vs 390 MPa (56.6 ksi). In exchange, 1215 Annealed is the more ductile: elongation 28% versus 12% for 1215 Carburized, and 1215 Carburized is harder (600 HB vs 111 HB). 1215 Annealed runs hotter in service (400°C vs 200°C continuous). On the shop floor, 1215 Annealed machines more easily (very good vs poor) and 1215 Annealed welds better (poor vs not recommended).
1215 AnnealedChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
1215 CarburizedChoose it when strength drives the design.
1215 Annealed vs 1215 Carburized: 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.
Thermal Conductivity
Max Service Temperature (continuous)
Same in both: 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 · 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 Carburized — frequently asked
Is 1215 Carburized stronger than 1215 Annealed?
Yes. 1215 Carburized has a typical yield strength of 380 MPa (55.1 ksi) against 240 MPa (34.8 ksi) for 1215 Annealed — about 58% more. Tensile strength is 560 MPa (81.2 ksi) vs 390 MPa (56.6 ksi).
Which condition does FabDigit quote by default, Annealed or Carburized?
HR is the default 1215 condition in the FabDigit quote flow (neither Annealed nor Carburized). 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 Carburized?
1215 Annealed. Its machinability rates very good (82/100) against poor (15/100) for 1215 Carburized; for welding the order is 1215 Annealed first (poor, 25/100) then 1215 Carburized (not recommended, 5/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 1215 Annealed and 1215 Carburized 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.