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Stainless 303 vs. Wood

Compare Stainless 303 vs. Wood strength, stiffness, weight and thermal properties.

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Stainless 303Wrought
WoodNatural
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Mechanical
Yield strength275MPasourceOutokumpu typical (product P = hot rolled plate, transverse)not given (tensile used)
Ultimate tensile strength585MPasourceOutokumpu typical99MPasourcemodulus of rupture (no direct tensile value)
Compressive strengthnot sourced46.6MPasourcecompression parallel to grain (maximum crushing strength), 12% MC
Flexural strengthnot sourced99MPasourcemodulus of rupture (static bending), 12% MC
Elongation at break35%sourceOutokumpu typical, A5not sourced
Young's modulus (stiffness)200GPasourceat RT (Table 12)12.5GPasourcebending MOE, parallel to grain
Density7,900kg/m³sourceat RTnot sourced
Strength to weight34.8kN·m/kgnot sourced
Stiffness to weight25.3MN·m/kgnot sourced
Poisson's ratio0.3sourcedesign value (structural stainless steels)0.35sourcemu_LR (red oak group, ~12% MC)
Shear modulus76.9GPa16.6x stiffer in shear4.63GPa
Bulk modulus167GPa13.9GPa
Speed of sound5,032m/snot sourced
Thermal
Thermal conductivity15W/m·Ksourceat RT0.18W/m·Ksourceacross grain, 12% MC (Table 4-7, approximate)
Thermal expansion16µm/m·Ksourcemean, 20–100 °C3.1–4.5µm/m·Ksourceparallel to grain, ovendry wood, range across species
100 mm part over a 50 °C swing80µm growth19µm growth4.21x less
Specific heat500J/kg·Ksourceat RT1,700J/kg·Ksourcesolid wood (all species), 12% MC, 27 C
Heats up and cools (diffusivity)3.8mm²/snot sourced
Thermal shock resistance902W/m3.7x more resistant244W/m
Max service temperature871°Csourcecontinuous, scaling limitnot sourced
Values for1.4305 / UNS S30300, Outokumpu typical values (hot rolled, solution annealed) from 'Steel Grades, Properties and Global Standards'; max service from Carpenter CarTech 303 datasheetNorthern red oak (Quercus rubra), clear straight-grained specimens at 12% MC, parallel to grain unless stated; USDA FPL Wood Handbook FPL-GTR-282 (2021) Ch. 4 and Ch. 5

Every value links to the document that states it. "Not sourced" means no citable source states it (or only a specification minimum); figures computed from it are left out too.

Questions

Is Stainless 303 stronger than Wood?

Stainless 303 is stronger: its yield strength is 275 MPa against tensile strength 99 MPa for Wood (2.78x).

Which is stiffer, Stainless 303 or Wood?

Stainless 303 is stiffer: Young's modulus 200 GPa against 12.5 GPa for Wood, so the same part in Stainless 303 deflects less under the same load.

Which conducts heat better, Stainless 303 or Wood?

Stainless 303 conducts heat better: 15 W/m·K against 0.18 W/m·K for Wood.

Which expands less with temperature?

Wood expands less: 3.8 µm/m·K against 16 µm/m·K for Stainless 303.

Among 59 materials

1k10k0.1110100Density (kg/m³)Young's modulus (GPa)Plastic PLAPlastic PETGPlastic ABSPlastic TPUPlastic NylonAluminumSteelIronTitaniumSteel AISI 1018Stainless 304Stainless 316Aluminum 6061-T6Aluminum 7075-T6Brass C360Copper C110GlassSteel AISI 1045Steel AISI 4340Steel A992Stainless 17-4PHAluminum 2024-T351Aluminum 5052-H32Aluminum 7050-T7451Titanium Ti-6Al-4VBrass C260Nickel Inconel 718Magnesium AZ31B-H24Zinc Zamak 3Plastic ABS (bulk/injection)Plastic PolycarbonatePlastic POM/AcetalPlastic Nylon PA6Plastic Nylon PA66Plastic PEEKPlastic UHMWPEPlastic HDPEPlastic PolypropylenePlastic PMMAFDM ASAFDM PolycarbonateFDM PAHT-CFFDM HIPSSLA Resin Tough 2000SLS PA12 NylonDMLS AlSi10Mg AluminumDMLS Ti-6Al-4V ELI TitaniumDMLS 316L Stainless SteelDMLS 17-4PH Stainless SteelStainless 303
Stiffness against density
1k10k101001kDensity (kg/m³)Yield strength (MPa)Plastic PLAPlastic PETGPlastic ABSPlastic TPUPlastic NylonRubberAluminumSteelIronTitaniumSteel AISI 1018Stainless 304Stainless 316Aluminum 6061-T6Aluminum 7075-T6Brass C360Copper C110GlassSteel AISI 1045Steel AISI 4340Steel A992Stainless 17-4PHAluminum 2024-T351Aluminum 5052-H32Aluminum 7050-T7451Titanium Ti-6Al-4VBrass C260Nickel Inconel 718Magnesium AZ31B-H24Zinc Zamak 3Plastic ABS (bulk/injection)Plastic PolycarbonatePlastic POM/AcetalPlastic Nylon PA6Plastic Nylon PA66Plastic PEEKPlastic PTFEPlastic UHMWPEPlastic HDPEPlastic PolypropylenePlastic PMMAFDM ASAFDM PolycarbonateFDM PAHT-CFFDM HIPSSLA Resin Tough 2000SLA Resin Elastic 50ASLS PA12 NylonDMLS AlSi10Mg AluminumDMLS Ti-6Al-4V ELI TitaniumDMLS 316L Stainless SteelDMLS 17-4PH Stainless SteelBrickStainless 303
Strength against density

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