I use the large band saws at work , for box section , with soluble oil
over a period of time , where they bend / flex around the wheels , they seem to harden & start cracking
happens to the best of them (or maybe my company just buys cheap - Thames valley saw services) some last longer than others
you could try less tension on them - but they go out of true & blade slips
they can be welded back together , which we do if it's a new blade , the weld usually lasts till it cracks somewhere else
have had ones that have lasted ages & go blunt , when you take them off you can easily snap them by hand into little bits
edit - with only 10 - 15 cuts , I would weld it back up & complain to supplier , as I would expect 1000's of cuts
looks like it could be an over hardened blade , to crack so soon - normally the blade edge is blue where only that bit is hardened (just a guess)
Edited by sledgehammer, 02 January 2017 - 03:46 PM.