Steel SCM422 vs SNCM616
Steel · grade comparison
Steel SCM422 and SNCM616 are both steel grades. SNCM616 is the stronger of the two: yield strength 450 MPa (65.3 ksi) against 370 MPa (53.7 ksi) for SCM422, about 22% more; tensile strength follows at 700 MPa (102 ksi) vs 580 MPa (84.1 ksi). In exchange, SCM422 is the more ductile: elongation 25% versus 20% for SNCM616, and SNCM616 is harder (210 HB vs 170 HB). SNCM616 runs hotter in service (400°C vs 350°C continuous) and SCM422 conducts heat better (42 W/m·K vs 35 W/m·K). On the shop floor, SCM422 machines more easily (good vs fair), SCM422 welds better (fair vs poor), and SCM422 sits in a lower cost tier (budget, $) than SNCM616 (standard, $$).
SCM422Choose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
SNCM616Choose it when strength drives the design, or when the part sees heat.
SCM422 vs SNCM616: 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
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 · Reduction in Area 55%
Physical
Density and transition temperatures.
Liquidus Temperature
Same in both: Density 7.85 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,425°C2,597 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Thermal Expansion (CTE, 20–100 °C)
Latent Heat of Fusion
Max Service Temperature (continuous)
Min Service Temperature
Same in both: Specific Heat Capacity 470 J/kg·K0.11 BTU/lb·°F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
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)
Brazeability / Solderability
Same in both: Polishability 60 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Typical Recycled Content
Same in both: Embodied Water 60 L/kg7.2 gal/lb
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Modulus of Resilience
Thermal Diffusivity
Same in both: Specific Stiffness (E / density) 26.2 MN·m/kg · Thermal Shock Resistance Index 10
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.
Manufacturing and finishing
| Capability | SCM422 | SNCM616 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $ Budget | $$ Standard |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both take the same 9 finishes: Copper Plating, Electroless Nickel (EN), Epoxy Coating, Gold Plating, Hard Chrome Plating, Manganese Phosphate, Plasma Spray, Silver Plating, Zinc Phosphate.
SCM422 vs SNCM616 — frequently asked
Is SNCM616 stronger than SCM422?
Yes. SNCM616 has a typical yield strength of 450 MPa (65.3 ksi) against 370 MPa (53.7 ksi) for SCM422 — about 22% more. Tensile strength is 700 MPa (102 ksi) vs 580 MPa (84.1 ksi).
Which is cheaper, SCM422 or SNCM616?
SCM422 is the lower-cost material: it sits in the budget tier ($) while SNCM616 is standard ($$). Part price depends far more on geometry, tolerance and quantity than on raw stock — upload a CAD file for a live quote.
Which is easier to machine, SCM422 or SNCM616?
SCM422. Its machinability rates good (55/100) against fair (45/100) for SNCM616; for welding the order is SCM422 first (fair, 40/100) then SNCM616 (poor, 25/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in SCM422 and SNCM616 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.