Stainless Steel CB6 Q&T 260 vs CB6-SR
Stainless Steel · CB6 temper comparison
CB6 Q&T 260 and CB6-SR are two conditions of the same stainless steel grade, CB6: Q&T 260 (hardened and low-temperature tempered ~230–280 °C) versus SR (stress relieved). The chemistry is identical, so every difference below comes from the condition. CB6 Q&T 260 is the stronger of the two: yield strength 900 MPa (131 ksi) against 530 MPa (76.9 ksi) for CB6-SR, about 70% more; tensile strength follows at 1,150 MPa (167 ksi) vs 740 MPa (107 ksi). In exchange, CB6-SR is the more ductile: elongation 14% versus 8% for CB6 Q&T 260, and CB6 Q&T 260 is harder (360 HB vs 235 HB). CB6-SR runs hotter in service (600°C vs 250°C continuous). On the shop floor, CB6-SR machines more easily (fair vs poor).
CB6 Q&T 260Choose it when strength drives the design.
CB6-SRChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
CB6 Q&T 260 vs CB6-SR: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all stainless 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 stainless 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 200 GPa29 Msi · Shear Modulus 78 GPa11.3 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.28
Physical
Density and transition temperatures.
Same in both: Density 7.7 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.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 25 W/m·K14.4 BTU/hr·ft·°F · Specific Heat Capacity 460 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 10.4 µm/m·K5.8 µin/in·°F · Latent Heat of Fusion 270 J/g116 BTU/lb · Min Service Temperature -30°C-22 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 2.9 % IACS · Electrical Resistivity 6×10⁻⁷ Ω·m23.6 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.3 V
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 65 / 100 · Brazeability / Solderability 40 / 100 · Polishability 72 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 53 MJ/kg22,786 BTU/lb · Embodied Carbon (primary production) 3.6 kg CO₂/kg · Embodied Water 90 L/kg10.8 gal/lb · Typical Recycled Content 75%
Strength versus weight
Yield strength against density for every stainless steel grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
CB6 Q&T 260 vs CB6-SR — frequently asked
Is CB6 Q&T 260 stronger than CB6-SR?
Yes. CB6 Q&T 260 has a typical yield strength of 900 MPa (131 ksi) against 530 MPa (76.9 ksi) for CB6-SR — about 70% more. Tensile strength is 1,150 MPa (167 ksi) vs 740 MPa (107 ksi).
Which condition does FabDigit quote by default, Q&T 260 or SR?
N+T is the default CB6 condition in the FabDigit quote flow (neither Q&T 260 nor SR). 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, CB6 Q&T 260 or CB6-SR?
CB6-SR. Its machinability rates fair (44/100) against poor (25/100) for CB6 Q&T 260.
Ready to make it?
Upload a CAD file and FabDigit prices the part in CB6 Q&T 260 and CB6-SR 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.