Question

structural steel will lose about 90% of its strength in a fire that raises the temperature to 1000 degrees fahrenheit for more than 15 minutes. if alloyed with two other metals, the steel will increase its strength by 50%. which two metals should be added? (you will need to check of two correct choices to get this question correct.)
molybdenum
chromium
titanium
magnesium
cobalt
review

Explanation:

To determine the metals that increase steel's strength by 50% when alloyed, we rely on materials science (a subfield of Engineering in Natural Science). Molybdenum and Chromium are known to enhance steel's strength significantly. Molybdenum improves strength at high temperatures and hardenability, while Chromium increases hardness, strength, and corrosion resistance. Titanium, Magnesium, and Cobalt have different primary roles (e.g., Titanium for lightness, Magnesium for light alloys, Cobalt for specific alloys but not major strength enhancers for structural steel in this context).

Answer:

A. Molybdenum, B. Chromium