This chromium-molybdenum alloy is one of the most widely used aircraft steels because of its combination of weldability, ease of fabrication and mild hardenability. MIL-T-6736. All stock is either American or German, unless the part number ends in 41C, in which case it is Chinese.
When ordering custom lengths: please enter the length you would like, and how many lengths of that size you’d like. For instance entering 4 in ‘length’ and 5 in ‘quantity’ will order 5 four-foot lengths. 8 ft maximum length shipped by UPS. 5 ft or longer UPS rates tend to increase.