Steel SCM435 Annealed vs SCM435-HR
Steel · SCM435 temper comparison
SCM435 Annealed and SCM435-HR are two conditions of the same steel grade, SCM435: Annealed versus HR (hot rolled). The chemistry is identical, so every difference below comes from the condition. SCM435-HR is the stronger of the two: yield strength 450 MPa (65.3 ksi) against 380 MPa (55.1 ksi) for SCM435 Annealed, about 18% more; tensile strength follows at 700 MPa (102 ksi) vs 600 MPa (87 ksi). In exchange, SCM435 Annealed is the more ductile: elongation 25% versus 20% for SCM435-HR, and SCM435-HR is harder (207 HB vs 175 HB). On the shop floor, SCM435 Annealed machines more easily (68 vs 55 out of 100).
SCM435 AnnealedChoose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
SCM435-HRChoose it when strength drives the design.
SCM435 Annealed vs SCM435-HR: 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
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
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 · Compressive Strength 460 MPa66.7 ksi · Shear Strength 430 MPa62.4 ksi · Fracture Toughness (K_IC) 75 MPa·√m68.3 ksi·√in · Hardness, Vickers 217 HV
Physical
Density and transition temperatures.
Same in both: Density 7.85 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,416°C2,581 °F · Liquidus Temperature 1,495°C2,723 °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 473 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 12.3 µm/m·K6.8 µin/in·°F · Latent Heat of Fusion 250 J/g107 BTU/lb · Max Service Temperature (continuous) 400°C752 °F · Min Service Temperature -40°C-40 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 7.8 % 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 13 / 100
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 55 / 100 · Polishability 65 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 29 MJ/kg12,468 BTU/lb · Embodied Carbon (primary production) 2.1 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.
SCM435 Annealed vs SCM435-HR — frequently asked
Is SCM435-HR stronger than SCM435 Annealed?
Yes. SCM435-HR has a typical yield strength of 450 MPa (65.3 ksi) against 380 MPa (55.1 ksi) for SCM435 Annealed — about 18% more. Tensile strength is 700 MPa (102 ksi) vs 600 MPa (87 ksi).
Which condition does FabDigit quote by default, Annealed or HR?
HR is the default SCM435 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, SCM435 Annealed or SCM435-HR?
SCM435 Annealed, by a small margin. Both rate good for machinability — 68/100 against 55/100 for SCM435-HR; for welding the order is SCM435 Annealed first (fair, 50/100) then SCM435-HR (fair, 45/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in SCM435 Annealed and SCM435-HR 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.