You did one inch plate with 6010 in a "stack of dimes" manner? How the heck big was the rod you used? Your porosity and slag inclusion rate must have been astronomical on such a multipass uneven deposition weld. But, hey, it passed tensile test. Must have been one ugleeee weld. Or did you cover up all the slag and porosity with some 7018?
X ray it now and get back to me.
Ever wonder why they give you 6010 for your first six weeks at welding school?
Steve