It's not a typo, but you need much more than 0.5%. Here's a phase diagram: http://www.arc.nucapt.northwestern.edu/refbase/files/Royset-2005.pdf http://www.arc.

It's not a typo, but you need much more than 0.5%. Here's a phase diagram: http://www.arc.nucapt.northwestern.edu/refbase/files/Royset-2005.pdf http://www.arc.nucapt.northwestern.edu/refbase/files/Royset-...