Which material is given as an example of high embodied energy due to production processes?

Which material is given as an example of high embodied energy due to production processes?

• A. Aluminum
• B. Glass
• C. Stainless steel
• D. Copper

Answer: (C)

Embodied energy is the total energy needed to get a material from raw ore to finished product and ready for use. Stainless steel has a high embodied energy because producing it involves melting iron and then adding costly alloying elements like chromium and nickel (and sometimes molybdenum) to give corrosion resistance and strength. These alloying steps, along with the energy-intensive furnace processes used to refine and homogenize the steel, drive up the overall energy required. Recycling stainless steel helps reduce some energy use, but the energy needed to produce the alloys and achieve the desired microstructure remains significant, making its embodied energy high compared with many other common materials.

Embodied energy is the total energy needed to get a material from raw ore to finished product and ready for use. Stainless steel has a high embodied energy because producing it involves melting iron and then adding costly alloying elements like chromium and nickel (and sometimes molybdenum) to give corrosion resistance and strength. These alloying steps, along with the energy-intensive furnace processes used to refine and homogenize the steel, drive up the overall energy required. Recycling stainless steel helps reduce some energy use, but the energy needed to produce the alloys and achieve the desired microstructure remains significant, making its embodied energy high compared with many other common materials.