Steel SCM422 Annealed vs SCM422 Spheroidized
Steel · SCM422 temper comparison
SCM422 Annealed and SCM422 Spheroidized are two conditions of the same steel grade, SCM422: Annealed versus Spheroidized (spheroidize annealed). The chemistry is identical, so every difference below comes from the condition. SCM422 Annealed is the stronger of the two: yield strength 370 MPa (53.7 ksi) against 340 MPa (49.3 ksi) for SCM422 Spheroidized, about 9% more; tensile strength follows at 580 MPa (84.1 ksi) vs 540 MPa (78.3 ksi). In exchange, SCM422 Spheroidized is the more ductile: elongation 28% versus 25% for SCM422 Annealed, and SCM422 Annealed is harder (170 HB vs 155 HB).
SCM422 AnnealedChoose it when strength drives the design.
SCM422 SpheroidizedChoose it when the part is bent, formed or impact-loaded.
SCM422 Annealed vs SCM422 Spheroidized: 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.
SCM422 AnnealedSCM422 Spheroidized
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)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Same in both: Elastic (Young's) Modulus 206 GPa29.9 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.
Same in both: Thermal Conductivity 42 W/m·K24.3 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 · Max Service Temperature (continuous) 350°C662 °F · 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 %)
Formability (cold)
Same in both: Weldability 40 / 100 · Brazeability / Solderability 55 / 100 · Polishability 60 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 34 MJ/kg14,617 BTU/lb · Embodied Carbon (primary production) 2.3 kg CO₂/kg · Embodied Water 60 L/kg7.2 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.
SCM422 Annealed vs SCM422 Spheroidized — frequently asked
Is SCM422 Annealed stronger than SCM422 Spheroidized?
Yes. SCM422 Annealed has a typical yield strength of 370 MPa (53.7 ksi) against 340 MPa (49.3 ksi) for SCM422 Spheroidized — about 9% more. Tensile strength is 580 MPa (84.1 ksi) vs 540 MPa (78.3 ksi).
Which condition does FabDigit quote by default, Annealed or Spheroidized?
Annealed is the default SCM422 condition in the FabDigit quote flow. 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, SCM422 Annealed or SCM422 Spheroidized?
SCM422 Spheroidized, by a small margin. Both rate good for machinability — 60/100 against 55/100 for SCM422 Annealed.
Ready to make it?
Upload a CAD file and FabDigit prices the part in SCM422 Annealed and SCM422 Spheroidized 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.