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Causes of industrial growth after the Civil War were an increase in the steel industry and the growth of railroads.
Steel is melted or vaporized, not burned.
Heat increases the potential energy and temperature of steel.
increase steel production
The Chinese factory were they were made burned down.
When steel (or indeed anything) is heated its mass does not change. Volume is altered by cooling and heating. In this case the volume of the steel would increase.
Molybdenum
agriculture production
increase carbon and manganese
phosphorus
The steel wool will burned and turned in black substance.
Steel is mainly Iron with small amount of Nickel or/and chromium, carbon content of steel is about 2.5%. The increase in temperature increases the distance among the Iron atoms so carbon become accommodated easily in material.