Steel 94B15-CD vs 94B15 QT-200
Steel · 94B15 temper comparison
94B15-CD and 94B15 QT-200 are two conditions of the same steel grade, 94B15: CD (cold drawn) versus QT-200 (Q&T). The chemistry is identical, so every difference below comes from the condition. 94B15 QT-200 is the stronger of the two: yield strength 970 MPa (141 ksi) against 545 MPa (79 ksi) for 94B15-CD, about 78% more; tensile strength follows at 1,240 MPa (180 ksi) vs 640 MPa (92.8 ksi). In exchange, 94B15-CD is the more ductile: elongation 15% versus 13% for 94B15 QT-200, and 94B15 QT-200 is harder (390 HB vs 187 HB). 94B15 QT-200 runs hotter in service (400°C vs 300°C continuous). On the shop floor, 94B15-CD welds better (good vs fair).
94B15-CDChoose it when the part is bent, formed or impact-loaded, or when it will be welded.
94B15 QT-200Choose it when strength drives the design, or when the part sees heat.
94B15-CD vs 94B15 QT-200: 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) 1,425°C2,597 °F · Liquidus Temperature 1,500°C2,732 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 44 W/m·K25.4 BTU/hr·ft·°F · Specific Heat Capacity 470 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 12.2 µm/m·K6.8 µin/in·°F · Latent Heat of Fusion 250 J/g107 BTU/lb · Min Service Temperature -40°C-40 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 8 % IACS · Electrical Resistivity 2.2×10⁻⁷ Ω·m8.66 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.6 V · Corrosion Resistance 10 / 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 65 / 100 · Polishability 55 / 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.
94B15-CD vs 94B15 QT-200 — frequently asked
Is 94B15 QT-200 stronger than 94B15-CD?
Yes. 94B15 QT-200 has a typical yield strength of 970 MPa (141 ksi) against 545 MPa (79 ksi) for 94B15-CD — about 78% more. Tensile strength is 1,240 MPa (180 ksi) vs 640 MPa (92.8 ksi).
Which condition does FabDigit quote by default, CD or QT-200?
ANN is the default 94B15 condition in the FabDigit quote flow (neither CD nor QT-200). 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 welds better, 94B15-CD or 94B15 QT-200?
94B15-CD. Its weldability rates good (55/100) against fair (35/100) for 94B15 QT-200.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 94B15-CD and 94B15 QT-200 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.