Steel 826M40 Annealed vs 826M40-V
Steel · 826M40 temper comparison
826M40 Annealed and 826M40-V are two conditions of the same steel grade, 826M40: Annealed versus V (hardened and tempered, 1000–1150 MPa). The chemistry is identical, so every difference below comes from the condition. 826M40-V is the stronger of the two: yield strength 900 MPa (131 ksi) against 480 MPa (69.6 ksi) for 826M40 Annealed, about 88% more; tensile strength follows at 1,075 MPa (156 ksi) vs 750 MPa (109 ksi). In exchange, 826M40 Annealed is the more ductile: elongation 22% versus 14% for 826M40-V, and 826M40-V is harder (320 HB vs 225 HB). 826M40 Annealed runs hotter in service (450°C vs 400°C continuous). On the shop floor, 826M40 Annealed machines more easily (good vs fair).
826M40 AnnealedChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
826M40-VChoose it when strength drives the design.
826M40 Annealed vs 826M40-V: 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
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell C
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 208 GPa30.2 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 7.85 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,420°C2,588 °F · Liquidus Temperature 1,490°C2,714 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 42 W/m·K24.3 BTU/hr·ft·°F · Specific Heat Capacity 470 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 250 J/g107 BTU/lb · Min Service Temperature -50°C-58 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 7.2 % IACS · Electrical Resistivity 2.4×10⁻⁷ Ω·m9.45 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.61 V · Corrosion Resistance 13 / 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 50 / 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) 2.5 kg CO₂/kg · Embodied Water 75 L/kg9 gal/lb · Typical Recycled Content 30%
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.
826M40 Annealed vs 826M40-V — frequently asked
Is 826M40-V stronger than 826M40 Annealed?
Yes. 826M40-V has a typical yield strength of 900 MPa (131 ksi) against 480 MPa (69.6 ksi) for 826M40 Annealed — about 88% more. Tensile strength is 1,075 MPa (156 ksi) vs 750 MPa (109 ksi).
Which condition does FabDigit quote by default, Annealed or V?
T is the default 826M40 condition in the FabDigit quote flow (neither Annealed nor V). 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, 826M40 Annealed or 826M40-V?
826M40 Annealed. Its machinability rates good (55/100) against fair (38/100) for 826M40-V; for welding the order is 826M40 Annealed first (poor, 25/100) then 826M40-V (poor, 20/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 826M40 Annealed and 826M40-V 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.