Automakers round the world are faced with a serious dilemma: How do you meet various government emission and fuel economy standards while still producing strong, safe vehicles? Reducing weight is a key strategy, of course, and that means moving away from steel to lighter materials. It’s estimated that steel currently accounts for about 60% of an average automobile’s weight. However steel content decreases as automakers incorporate aluminum, plastics, manganese, composites and advanced high-strength, but lighter weight, steel alloys. The most recent example is the venerable Ford F-150 pickup that now uses aluminum for 25% of its curb weight.