BASF Ultradur B 4300 G6 (PBT, 30% glass fibre), injection moulding grade; product information sheet 09/2026, typical values for uncoloured product at 23 °C.
EOS PA 2200 (PA12) Material Data Sheet, process parameter 'Balance' at 120 µm layer thickness, X orientation, dry (conditioned values not given). Live MDS status 04.10.2026, last changed 10.09.2026; PDF via ?topdf=... link on the same page.
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.
SLS PA12 Nylon is 3D printed: its properties depend on build direction and print settings; these are typical values.
Questions
Is Plastic PBT GF30 stronger than SLS PA12 Nylon?
Plastic PBT GF30 is stronger: its tensile strength is 140 MPa against 48 MPa for SLS PA12 Nylon (2.92x).
Which is lighter, Plastic PBT GF30 or SLS PA12 Nylon?
SLS PA12 Nylon is lighter: 930 kg/m³ against 1,530 kg/m³ for Plastic PBT GF30.
Which is stiffer, Plastic PBT GF30 or SLS PA12 Nylon?
Plastic PBT GF30 is stiffer: Young's modulus 9.8 GPa against 1.65 GPa for SLS PA12 Nylon, so the same part in Plastic PBT GF30 deflects less under the same load.
Which is lighter for the same job, Plastic PBT GF30 or SLS PA12 Nylon?
For the same stiffness or strength: Plastic PBT GF30 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 be
Plastic PBT GF30
SLS PA12 Nylon
Stiff rod or tie (tension)
lighter
3.61x heavier
Stiff beam (bending)
lighter
48% heavier
Stiff panel or plate
lighter
10% heavier
Strong rod or tie
lighter
1.77x heavier
Strong beam
lighter
24% heavier
Strong panel or plate
lighter
4% heavier
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).