Your question seems to be based on a misunderstanding. The melting point of a substance depends primarily on its chemical composition and intermolecular forces, rather than atmospheric pressure. While pressure can influence the melting points of certain substances, the effect is usually quite small and the melting point typically changes by only a few degrees Celsius.

For most substances, the melting point is defined as the temperature at which the solid and liquid phases exist in equilibrium at atmospheric pressure (usually taken to be 1 atmosphere or 101.325 kilopascals). Under different pressure conditions, the melting point may shift, but the change is usually not significant for everyday purposes.

For instance, the melting point of pure water at atmospheric pressure is approximately 0 degrees Celsius (32 degrees Fahrenheit). Even if the atmospheric pressure were to increase to 1.2 atmospheres, the melting point of water would only change by a tiny fraction of a degree, remaining very close to 0 degrees Celsius.

Therefore, the atmospheric pressure of 1.2 would have a negligible impact on the melting point of most substances, and it would not be correct to assume that a specific substance would melt at a particular temperature based solely on atmospheric pressure.