Celanese Fortron 1140L4 (PPS, 40% glass fibre), injection moulding; FORTRON PPS Short-Term Properties Guide (PPS-012, 2016); thermal conductivity and Poisson for 40% glass-reinforced Fortron from the Fortron PPS Design Manual (PPS-050, 2013).
AISI 1045 cold drawn bar (Niagara LaSalle) for mechanical; Ovako C45 (lists 'SAE 1045' as a similar designation) for physical constants
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 Plastic PPS GF40 stronger than Steel AISI 1045?
Steel AISI 1045 is stronger: its yield strength is 531 MPa against tensile strength 195 MPa for Plastic PPS GF40 (2.72x).
Which is lighter, Plastic PPS GF40 or Steel AISI 1045?
Plastic PPS GF40 is lighter: 1,650 kg/m³ against 7,800 kg/m³ for Steel AISI 1045.
Which is stiffer, Plastic PPS GF40 or Steel AISI 1045?
Steel AISI 1045 is stiffer: Young's modulus 210 GPa against 14.7 GPa for Plastic PPS GF40, so the same part in Steel AISI 1045 deflects less under the same load.
Which is lighter for the same job, Plastic PPS GF40 or Steel AISI 1045?
For the same stiffness or strength: Plastic PPS GF40 is lighter for a stiff beam (bending), stiff panel or plate, strong rod or tie, strong beam, strong panel or plate; Steel AISI 1045 is lighter for a stiff rod or tie (tension).
Part that must be
Plastic PPS GF40
Steel AISI 1045
Stiff rod or tie (tension)
3.02x heavier
lighter
Stiff beam (bending)
lighter
25% heavier
Stiff panel or plate
lighter
1.95x heavier
Strong rod or tie
lighter
1.74x heavier
Strong beam
lighter
2.42x heavier
Strong panel or plate
lighter
2.86x 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).
Which conducts heat better, Plastic PPS GF40 or Steel AISI 1045?
Steel AISI 1045 conducts heat better: 42.5 W/m·K against 0.2 W/m·K for Plastic PPS GF40.
Which expands less with temperature?
Plastic PPS GF40 expands less: 12 µm/m·K against 12 µm/m·K for Steel AISI 1045.