Steel 15B35-HR vs 15B35-N
Steel · 15B35 temper comparison
15B35-HR and 15B35-N are two conditions of the same steel grade, 15B35: HR (hot rolled) versus N (normalized). The chemistry is identical, so every difference below comes from the condition. 15B35-N is the stronger of the two: yield strength 450 MPa (65.3 ksi) against 400 MPa (58 ksi) for 15B35-HR, about 13% more; tensile strength follows at 720 MPa (104 ksi) vs 655 MPa (95 ksi). In exchange, 15B35-HR is the more ductile: elongation 20% versus 18% for 15B35-N, and 15B35-N is harder (205 HB vs 190 HB). 15B35-N runs hotter in service (400°C vs 350°C continuous).
15B35-HRChoose it when the part is bent, formed or impact-loaded.
15B35-NChoose it when strength drives the design, or when the part sees heat.
15B35-HR vs 15B35-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.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
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 · Reduction in Area 45%
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 1,495°C2,723 °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 475 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 247 J/g106 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).
Same in both: Galvanic Potential (seawater, vs SCE) -0.61 V · Corrosion Resistance 10 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Weldability
Formability (cold)
Same in both: Machinability Rating (AISI 1212 = 100 %) 60% · Brazeability / Solderability 60 / 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.
15B35-HR vs 15B35-N — frequently asked
Is 15B35-N stronger than 15B35-HR?
Yes. 15B35-N has a typical yield strength of 450 MPa (65.3 ksi) against 400 MPa (58 ksi) for 15B35-HR — about 13% more. Tensile strength is 720 MPa (104 ksi) vs 655 MPa (95 ksi).
Which condition does FabDigit quote by default, HR or N?
CD is the default 15B35 condition in the FabDigit quote flow (neither HR nor N). 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, 15B35-HR or 15B35-N?
15B35-N. Its weldability rates fair (45/100) against fair (40/100) for 15B35-HR.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 15B35-HR and 15B35-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.