Copper C12200 vs. SLA Resin Elastic 50A

Compare Copper C12200 vs. SLA Resin Elastic 50A strength, stiffness, weight and thermal properties.

SLA Resin Elastic 50A3D printed (SLA resin)

Mechanical	Copper C12200	SLA Resin Elastic 50A
Yield strength	69MPa1	not given (tensile used)
Ultimate tensile strength	221MPa165x stronger	3.4MPa2
Elongation at break	45%1	160%23.56x more ductile
Young's modulus (stiffness)	117GPa1	not sourced
Density	8,941kg/m³1	1,010kg/m³28.85x lighter
Strength to weight	7.72kN·m/kg2.29x higher	3.37kN·m/kg
Stiffness to weight	13.1MN·m/kg	not sourced
Poisson's ratio	0.343	not sourced
Shear modulus	43.7GPa	not sourced
Bulk modulus	122GPa	not sourced
Speed of sound	3,621m/s	not sourced

Stiffness against densityHigher and further left: stiffer for its weight

Strength against densityHigher and further left: stronger for its weight

Thermal	Copper C12200	SLA Resin Elastic 50A
Thermal conductivity	339W/m·K1	not sourced
Thermal expansion	16.9µm/m·K1	not sourced
100 mm part over a 50 °C swing	84.5µm growth	not sourced
Specific heat	385J/kg·K1	not sourced
Heats up and cools (diffusivity)	98.5mm²/s	not sourced
Thermal shock resistance	7,799W/m	not sourced
Melting point	liquidus1,083°C1	not sourced
Glass transition	not sourced	DMA-34.5°C2

Thermal conductivity against densityHigher and further left: spreads more heat for its weight

Thermal expansion against thermal conductivityLower and further right: warps less when heated

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Sources3 documents: Copper Development Association, Formlabs, Wieland

Copper C12200: C12200 phosphorus-deoxidized copper (DHP, the air-conditioning and refrigeration tube copper), tube annealed to 0.050 mm grain size (OS050), 0.065 in. wall, copper.org typical values
SLA Resin Elastic 50A: Formlabs Elastic 50A Resin V2 (FLELCL02), TDS Rev. 01 24.01.2024; parts printed on Form 3, 100 µm, Elastic 50A V2 settings and post-processing; tensile on Die C specimens cut from printed sheets after 3+ h at 23 °C.

1
C12200 Alloy (copper.org)Copper Development Associationarchived copyCopper C12200 · Yield strength: typical, 0.5% extension under load, 0.065 in. tubeCopper C12200 · Ultimate tensile strength: typical, 0.065 in. tubeCopper C12200 · Elongation at break: typical, 0.065 in. tubeCopper C12200 · Young's modulus (stiffness): typicalCopper C12200 · Density: nominalCopper C12200 · Thermal conductivity: typical, 20 °CCopper C12200 · Thermal expansion: typical, mean 20-100 °CCopper C12200 · Specific heat: typical, 20 °CCopper C12200 · Melting point: liquidus
2
Elastic 50A Resin V2 Technical Data Sheet (2024)Formlabsarchived copySLA Resin Elastic 50A · Ultimate tensile strength: typicalSLA Resin Elastic 50A · Elongation at break: typicalSLA Resin Elastic 50A · Density: typicalSLA Resin Elastic 50A · Glass transition: DMA
3
Wieland-K19 (Cu-DHP, C12200) Data SheetWielandarchived copyCopper C12200 · Poisson's ratio: reference value at room temperature (Wieland-K19 = Cu-DHP = C12200, rolled products)

Each number points to the document that states it, with the exact basis. Values without a number are computed from the sourced ones. "Not sourced" means no citable source states it (or only a specification minimum); figures computed from it are left out too.

SLA Resin Elastic 50A is 3D printed: its properties depend on build direction and print settings; these are typical values.

Questions

Mechanical

Is Copper C12200 stronger than SLA Resin Elastic 50A?

Copper C12200 is stronger: its yield strength is 69 MPa against tensile strength 3.4 MPa for SLA Resin Elastic 50A (20.3x).

Which is lighter, Copper C12200 or SLA Resin Elastic 50A?

SLA Resin Elastic 50A is lighter: 1,010 kg/m³ against 8,941 kg/m³ for Copper C12200.

Which is lighter for the same job, Copper C12200 or SLA Resin Elastic 50A?

For the same stiffness or strength: Copper C12200 is lighter for a strong rod or tie; SLA Resin Elastic 50A is lighter for a strong beam, strong panel or plate.

Part that must be	Copper C12200	SLA Resin Elastic 50A
Strong rod or tie	lighter	2.29x heavier
Strong beam	19% heavier	lighter
Strong panel or plate	1.97x heavier	lighter

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 is more ductile, Copper C12200 or SLA Resin Elastic 50A?

SLA Resin Elastic 50A stretches further before it breaks: 160% elongation at break against 45% for Copper C12200.