AMg-6 does well at low temperature. One of the reasons the Soviets used it so much. If you get into materials, they are much quirkier than people realize. Fabricating with stainless steel is a real pain in the butt, because it can be over work hardend or annealed if you so much as look at it the wrong way. AMg-6 is an engineer's delight, because its strength is relatively unaffect by whatever you want to do with hit -- stamping, welding, cutting, drilling, milling, etc. BUt ifyou just look at tensile strenght/density, then you would think "Hey, why didn't we build the Sature V out of Balsa Wood?"