Steel 10B22-N vs 10B22 QT-109
Steel · 10B22 temper comparison
10B22-N and 10B22 QT-109 are two conditions of the same steel grade, 10B22: N (normalized) versus QT-109. The chemistry is identical, so every difference below comes from the condition. 10B22 QT-109 is the stronger of the two: yield strength 990 MPa (144 ksi) against 345 MPa (50 ksi) for 10B22-N, about 187% more; tensile strength follows at 1,100 MPa (160 ksi) vs 510 MPa (74 ksi). In exchange, 10B22-N is the more ductile: elongation 26% versus 10% for 10B22 QT-109, and 10B22 QT-109 is harder (330 HB vs 150 HB). 10B22-N runs hotter in service (400°C vs 280°C continuous).
10B22-NChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
10B22 QT-109Choose it when strength drives the design.
10B22-N vs 10B22 QT-109: 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)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Same in both: Elastic (Young's) Modulus 205 GPa29.7 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) 1,450°C2,642 °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 470 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 11.9 µm/m·K6.6 µin/in·°F · Latent Heat of Fusion 250 J/g107 BTU/lb · Min Service Temperature -30°C-22 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.6 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Formability (cold)
Same in both: Weldability 72 / 100 · Brazeability / Solderability 65 / 100 · Polishability 50 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 25 MJ/kg10,748 BTU/lb · Embodied Carbon (primary production) 1.9 kg CO₂/kg · Embodied Water 40 L/kg4.8 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.
10B22-N vs 10B22 QT-109 — frequently asked
Is 10B22 QT-109 stronger than 10B22-N?
Yes. 10B22 QT-109 has a typical yield strength of 990 MPa (144 ksi) against 345 MPa (50 ksi) for 10B22-N — about 187% more. Tensile strength is 1,100 MPa (160 ksi) vs 510 MPa (74 ksi).
Which condition does FabDigit quote by default, N or QT-109?
CD is the default 10B22 condition in the FabDigit quote flow (neither N nor QT-109). 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.
When should I choose 10B22-N over 10B22 QT-109?
Pick 10B22-N when the part is bent, formed or impact-loaded, or when the part sees heat. Pick 10B22 QT-109 when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 10B22-N and 10B22 QT-109 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.