Which factor most limited structural load-bearing capabilities of cast bronze columns created with ancient metallurgy techniques?

💡 Explanation

When casting bronze, gas solubility decreases during solidification because the high temperature allows gas to dissolve into the metal decreasing during it's change to solid, leading to bubble formation that creates pores weakening the final product. Therefore porosity significantly reduces the load-bearing capability, rather than sulfur inclusion, oxidation, or segregation which contribute minor effects compared to porosity formed by solidification problems.

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