Steel A106 Grade B-CDS vs A106 Grade B-N
Steel · A106 Grade B temper comparison
A106 Grade B-CDS and A106 Grade B-N are two conditions of the same steel grade, A106 Grade B: CDS (cold Drawn Seamless, stress relieved per A106) versus N (normalized). The chemistry is identical, so every difference below comes from the condition. A106 Grade B-CDS is the stronger of the two: yield strength 420 MPa (60.9 ksi) against 300 MPa (43.5 ksi) for A106 Grade B-N, about 40% more; tensile strength follows at 550 MPa (79.8 ksi) vs 470 MPa (68.2 ksi). In exchange, A106 Grade B-N is the more ductile: elongation 34% versus 20% for A106 Grade B-CDS, and A106 Grade B-CDS is harder (170 HB vs 140 HB).
A106 Grade B-CDSChoose it when strength drives the design.
A106 Grade B-NChoose it when the part is bent, formed or impact-loaded.
A106 Grade B-CDS vs A106 Grade B-N: 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.
A106 Grade B-CDSA106 Grade B-N
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)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Same in both: Elastic (Young's) Modulus 200 GPa29 Msi · Shear Modulus 79 GPa11.5 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29 · Compressive Strength 290 MPa42.1 ksi · Shear Strength 330 MPa47.9 ksi · Hardness, Vickers 150 HV
Physical
Density and transition temperatures.
Same in both: Density 7.85 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,470°C2,678 °F · Liquidus Temperature 1,520°C2,768 °F
Thermal
How each material carries heat and how hot it can run.
Min Service Temperature
Same in both: Thermal Conductivity 51 W/m·K29.5 BTU/hr·ft·°F · Specific Heat Capacity 470 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 11.7 µm/m·K6.5 µin/in·°F · Latent Heat of Fusion 247 J/g106 BTU/lb · Max Service Temperature (continuous) 425°C797 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 10 % IACS · Electrical Resistivity 1.7×10⁻⁷ Ω·m6.69 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.65 V · Corrosion Resistance 10 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability Rating (AISI 1212 = 100 %)
Formability (cold)
Same in both: Machinability 60 / 100 · Weldability 92 / 100 · Brazeability / Solderability 60 / 100 · Polishability 40 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 25 MJ/kg10,748 BTU/lb · Embodied Carbon (primary production) 2 kg CO₂/kg · Embodied Water 45 L/kg5.4 gal/lb · Typical Recycled Content 25%
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.
A106 Grade B-CDS vs A106 Grade B-N — frequently asked
Is A106 Grade B-CDS stronger than A106 Grade B-N?
Yes. A106 Grade B-CDS has a typical yield strength of 420 MPa (60.9 ksi) against 300 MPa (43.5 ksi) for A106 Grade B-N — about 40% more. Tensile strength is 550 MPa (79.8 ksi) vs 470 MPa (68.2 ksi).
Which condition does FabDigit quote by default, CDS or N?
Specify the condition in the material field or the drawing note; FabDigit prices the quote for the state you call out.
When should I choose A106 Grade B-CDS over A106 Grade B-N?
Pick A106 Grade B-CDS when strength drives the design. Pick A106 Grade B-N when the part is bent, formed or impact-loaded.
Ready to make it?
Upload a CAD file and FabDigit prices the part in A106 Grade B-CDS and A106 Grade B-N 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.