Cleveland-Cliffs / AK Steel ARMCO Pure Iron Product Data Bulletin (07/2022): Table 1 typical physical properties, Table 2 typical mechanical properties after SRA/recrystallization anneal.
Sumitomo Chemical SUMIKASUPER LCP E6006L (30% glass fibre; high strength, low shrinkage); SUMIKASUPER LCP Technical Note, Version 04 / Nov. 2023, typical values.
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 Iron stronger than Plastic LCP GF30?
Iron is stronger: its yield strength is 186 MPa against tensile strength 115 MPa for Plastic LCP GF30 (1.62x).
Which is lighter, Iron or Plastic LCP GF30?
Plastic LCP GF30 is lighter: 1,610 kg/m³ against 7,860 kg/m³ for Iron.
Which is stiffer, Iron or Plastic LCP GF30?
Iron is stiffer: Young's modulus 207 GPa against 11.5 GPa for Plastic LCP GF30, so the same part in Iron deflects less under the same load.
Which is lighter for the same job, Iron or Plastic LCP GF30?
For the same stiffness or strength: Iron is lighter for a stiff rod or tie (tension); Plastic LCP GF30 is lighter for a stiff beam (bending), stiff panel or plate, strong rod or tie, strong beam, strong panel or plate.
Part that must be
Iron
Plastic LCP GF30
Stiff rod or tie (tension)
lighter
3.69x heavier
Stiff beam (bending)
15% heavier
lighter
Stiff panel or plate
1.86x heavier
lighter
Strong rod or tie
3.02x heavier
lighter
Strong beam
3.54x heavier
lighter
Strong panel or plate
3.84x 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 conducts heat better, Iron or Plastic LCP GF30?
Iron conducts heat better: 73.2 W/m·K against 0.5 W/m·K for Plastic LCP GF30.
Which expands less with temperature?
Iron expands less: 13.7 µm/m·K against 20 µm/m·K for Plastic LCP GF30.