No evidence of Molten Steel.
"Various metals (most notably iron and lead) were melted during the WTC Event, producing spherical metallic particles. Exposure of phases to high
heat results in the formation of spherical particles due to surface tension. Figure 21 and Figure 22 show a spherical iron particle resulting from the
melting of iron (or steel)."
"In addition to the spherical iron and aluminosilicate particles, a variety of
heavy metal particles including lead, cadmium, vanadium, yttrium, arsenic, bismuth, and barium particles were produced by the pulverizing, melting
and/or combustion of the host materials such as solder, computer screens,
and paint during the WTC Event.
Combustion-related products are significant WTC Dust Markers, particularly
if seen in combination. However, it is worth noting that fly ash and partially
combusted products can occur in trace concentrations in ordinary building
dusts, but not in the concentrations observed in WTC Dust." page 23/34
"Many of the materials, such as lead, cadmium, mercury and various organic compounds, vaporized and then condensed during the WTC Event." page
"The presence of lead oxides on the surface of mineral wool indicates the exposure of high temperatures at which lead would have undergone
vaporization, oxidation, and condensation on the surface of mineral wool." page 25/34
Rj Lee Group
For lead to be vaporized the temperatures would have been over 1750 Celsius
1750 Celsius =3182 Fahrenheit
What's the hottest that NIST says the fires got?
NIST reported maximum upper layer air temperatures of about 1,000 degrees Celsius (1,800 degrees Fahrenheit) in the WTC towers