Materials / Compare

Solder SAC305 vs. Stainless Steel 17-4PH

Compare Solder SAC305 vs. Stainless Steel 17-4PH strength, stiffness, weight and thermal properties.

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Solder SAC305Cast
Stainless Steel 17-4PHWrought
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Mechanical
Yield strength22MPasourcetypical1,275MPasourcetypical, transverse, sheet/strip
Ultimate tensile strength39.6MPasourcetypical1,379MPasourcetypical, transverse, sheet/strip
Elongation at break49%sourcetypical9%sourcetypical, transverse, in 2 in. (50.8 mm)
Young's modulus (stiffness)6.9GPasourcetypical, temperature and strain rate not stated197GPasourceH 900
Density7,350kg/m³sourcetypical7,800kg/m³sourceH 900
Strength to weight2.99kN·m/kg163kN·m/kg54.6x higher
Stiffness to weight0.939MN·m/kg25.3MN·m/kg26.9x higher
Poisson's ratio0.35sourcetypical0.272sourceH 900 (column)
Shear modulus2.56GPa77.4GPa30.3x stiffer in shear
Bulk modulus7.67GPa144GPa
Speed of sound969m/s5,026m/s
Thermal
Thermal conductivity61W/m·Ksourcetypical, temperature not stated17.9W/m·Ksourceat 149 °C (300 °F), H 900
Thermal expansion21.9µm/m·Ksourcemean, 20-100 °C (MacDermid Alpha)10.8µm/m·Ksourcemean, 21–93 °C (70–200 °F), H 900
100 mm part over a 50 °C swing110µm growth54µm growth2.03x less
Specific heat232J/kg·Ksourcetypical (MacDermid Alpha)460J/kg·Ksourcemean, 0–100 °C, H 900
Heats up and cools (diffusivity)35.8mm²/s7.17x faster4.99mm²/s
Thermal shock resistance5,773W/m7,809W/m35% more resistant
Melting point217–220°Csourcesolidus-liquidusnot sourced
Max service temperaturenot sourced316°Csourcestrength-retention limit (not oxidation)
Values forSAC305 (Sn96.5Ag3.0Cu0.5) solder alloy, bulk; Indium Corporation Indalloy 256 (SAC305) for Preforms product data sheet (Form No. 100346 R0, 2024), selected properties, test temperature not stated; expansion and specific heat from MacDermid Alpha VACULOY SAC TDS (06 September 2023).Cleveland-Cliffs 17-4 PH, Condition H 900, sheet/strip, transverse (Product Data Bulletin, May 2021)

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 Solder SAC305 stronger than Stainless Steel 17-4PH?

Stainless Steel 17-4PH is stronger: its yield strength is 1,275 MPa against 22 MPa for Solder SAC305 (58x).

Which is lighter, Solder SAC305 or Stainless Steel 17-4PH?

Solder SAC305 is lighter: 7,350 kg/m³ against 7,800 kg/m³ for Stainless Steel 17-4PH.

Which is stiffer, Solder SAC305 or Stainless Steel 17-4PH?

Stainless Steel 17-4PH is stiffer: Young's modulus 197 GPa against 6.9 GPa for Solder SAC305, so the same part in Stainless Steel 17-4PH deflects less under the same load.

Which is lighter for the same job, Solder SAC305 or Stainless Steel 17-4PH?

For the same stiffness or strength: Stainless Steel 17-4PH is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate, strong rod or tie, strong beam, strong panel or plate.

Part that must beSolder SAC305Stainless Steel 17-4PH
Stiff rod or tie (tension)26.9x heavierlighter
Stiff beam (bending)5.04x heavierlighter
Stiff panel or plate2.88x heavierlighter
Strong rod or tie54.6x heavierlighter
Strong beam14.1x heavierlighter
Strong panel or plate7.17x heavierlighter

For the same stiffness or strength, mass scales with density over stiffness (or strength) raised to a power set by how the part is loaded: 1 for a rod in tension, 1/2 for a beam in bending, 1/3 for a panel (the standard material-selection indices).

Which conducts heat better, Solder SAC305 or Stainless Steel 17-4PH?

Solder SAC305 conducts heat better: 61 W/m·K against 17.9 W/m·K for Stainless Steel 17-4PH.

Which expands less with temperature?

Stainless Steel 17-4PH expands less: 10.8 µm/m·K against 21.9 µm/m·K for Solder SAC305.

Among 72 materials

1k10k0.1110100Density (kg/m³)Young's modulus (GPa)Plastic PLAPlastic PETGPlastic ABSPlastic TPUPlastic NylonAluminumSteelIronTitaniumSteel AISI 1018Stainless Steel 304Stainless Steel 316Aluminum 6061-T6Aluminum 7075-T6Brass C360Copper C110GlassSteel AISI 1045Steel AISI 4340Steel A992Stainless Steel 303Aluminum 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 SteelPCB Laminate FR-4SiliconCeramic Alumina 96%Ceramic Aluminum NitrideAluminum A380Aluminum 6063-T6Aluminum 1100-OAluminum ADC12Magnesium AZ91DPlastic PBT GF30Plastic PPS GF40Plastic LCP GF30Solder SAC305Stainless Steel 17-4PH
Stiffness against density
1k10k101001kDensity (kg/m³)Yield strength (MPa)Plastic PLAPlastic PETGPlastic ABSPlastic TPUPlastic NylonRubberAluminumSteelIronTitaniumSteel AISI 1018Stainless Steel 304Stainless Steel 316Aluminum 6061-T6Aluminum 7075-T6Brass C360Copper C110GlassSteel AISI 1045Steel AISI 4340Steel A992Stainless Steel 303Aluminum 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 SteelBrickPCB Laminate FR-4SiliconCeramic Alumina 96%Aluminum A380Aluminum 6063-T6Aluminum 1100-OAluminum ADC12Magnesium AZ91DPlastic PBT GF30Plastic PPS GF40Plastic LCP GF30Solder SAC305Stainless Steel 17-4PH
Strength against density

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