Steel 15CDV6 Annealed vs 15CDV6-HR
Steel · 15CDV6 temper comparison
15CDV6 Annealed and 15CDV6-HR are two conditions of the same steel grade, 15CDV6: Annealed versus HR (hot rolled). The chemistry is identical, so every difference below comes from the condition. 15CDV6-HR is the stronger of the two: yield strength 650 MPa (94.3 ksi) against 520 MPa (75.4 ksi) for 15CDV6 Annealed, about 25% more; tensile strength follows at 900 MPa (131 ksi) vs 720 MPa (104 ksi). In exchange, 15CDV6 Annealed is the more ductile: elongation 20% versus 15% for 15CDV6-HR, and 15CDV6-HR is harder (260 HB vs 210 HB). On the shop floor, 15CDV6 Annealed machines more easily (good vs fair).
15CDV6 AnnealedChoose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
15CDV6-HRChoose it when strength drives the design.
15CDV6 Annealed vs 15CDV6-HR: 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
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Same in both: Elastic (Young's) Modulus 207 GPa30 Msi · Shear Modulus 80 GPa11.6 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29 · Compressive Strength 670 MPa97.2 ksi · Shear Strength 540 MPa78.3 ksi · Fracture Toughness (K_IC) 120 MPa·√m109 ksi·√in · Hardness, Rockwell C 25 HRC · Hardness, Vickers 272 HV
Physical
Density and transition temperatures.
Same in both: Density 7.85 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,490°C2,714 °F · Liquidus Temperature 1,520°C2,768 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 42 W/m·K24.3 BTU/hr·ft·°F · Specific Heat Capacity 460 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 12.3 µm/m·K6.8 µin/in·°F · Latent Heat of Fusion 270 J/g116 BTU/lb · Max Service Temperature (continuous) 450°C842 °F · Min Service Temperature -60°C-76 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 7.5 % IACS · Electrical Resistivity 2.3×10⁻⁷ Ω·m9.06 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.6 V · Corrosion Resistance 15 / 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 65 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 33 MJ/kg14,187 BTU/lb · Embodied Carbon (primary production) 2.4 kg CO₂/kg · Embodied Water 55 L/kg6.6 gal/lb · Typical Recycled Content 20%
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.
15CDV6 Annealed vs 15CDV6-HR — frequently asked
Is 15CDV6-HR stronger than 15CDV6 Annealed?
Yes. 15CDV6-HR has a typical yield strength of 650 MPa (94.3 ksi) against 520 MPa (75.4 ksi) for 15CDV6 Annealed — about 25% more. Tensile strength is 900 MPa (131 ksi) vs 720 MPa (104 ksi).
Which condition does FabDigit quote by default, Annealed or HR?
HR is the default 15CDV6 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, 15CDV6 Annealed or 15CDV6-HR?
15CDV6 Annealed. Its machinability rates good (62/100) against fair (50/100) for 15CDV6-HR; for welding the order is 15CDV6 Annealed first (very good, 80/100) then 15CDV6-HR (very good, 75/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 15CDV6 Annealed and 15CDV6-HR 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.