Steel En30B Annealed vs En30B Nitrided
Steel · En30B temper comparison
En30B Annealed and En30B Nitrided are two conditions of the same steel grade, En30B: Annealed versus Nitrided. The chemistry is identical, so every difference below comes from the condition. En30B Nitrided is the stronger of the two: yield strength 1,000 MPa (145 ksi) against 550 MPa (79.8 ksi) for En30B Annealed, about 82% more; tensile strength follows at 1,150 MPa (167 ksi) vs 800 MPa (116 ksi). In exchange, En30B Annealed is the more ductile: elongation 20% versus 11% for En30B Nitrided, and En30B Nitrided is harder (340 HB vs 235 HB). En30B Nitrided runs hotter in service (450°C vs 350°C continuous). On the shop floor, En30B Annealed machines more easily (fair vs not recommended) and En30B Annealed welds better (poor vs not recommended).
En30B AnnealedChoose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
En30B NitridedChoose it when strength drives the design, or when the part sees heat.
En30B Annealed vs En30B Nitrided: 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
Compressive 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 207 GPa30 Msi · Shear Modulus 80 GPa11.6 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29 · Shear Strength 690 MPa100 ksi
Physical
Density and transition temperatures.
Same in both: Density 7.85 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,420°C2,588 °F · Liquidus Temperature 1,495°C2,723 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 34 W/m·K19.6 BTU/hr·ft·°F · Specific Heat Capacity 470 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 12 µm/m·K6.7 µin/in·°F · Latent Heat of Fusion 270 J/g116 BTU/lb · Min Service Temperature -60°C-76 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 5.5 % IACS · Electrical Resistivity 3.1×10⁻⁷ Ω·m12.2 µΩ·in
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 %)
Weldability
Formability (cold)
Same in both: Brazeability / Solderability 40 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 36 MJ/kg15,477 BTU/lb · Embodied Carbon (primary production) 2.5 kg CO₂/kg · Embodied Water 60 L/kg7.2 gal/lb · Typical Recycled Content 35%
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.
En30B Annealed vs En30B Nitrided — frequently asked
Is En30B Nitrided stronger than En30B Annealed?
Yes. En30B Nitrided has a typical yield strength of 1,000 MPa (145 ksi) against 550 MPa (79.8 ksi) for En30B Annealed — about 82% more. Tensile strength is 1,150 MPa (167 ksi) vs 800 MPa (116 ksi).
Which condition does FabDigit quote by default, Annealed or Nitrided?
Cond W is the default En30B condition in the FabDigit quote flow (neither Annealed nor Nitrided). 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, En30B Annealed or En30B Nitrided?
En30B Annealed. Its machinability rates fair (40/100) against not recommended (6/100) for En30B Nitrided; for welding the order is En30B Annealed first (poor, 20/100) then En30B Nitrided (not recommended, 5/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in En30B Annealed and En30B Nitrided 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.