Until recently I lived in just one of two worlds, hypereutectoid (above .8% carbon) instead of hypoeutectoid (below .8% carbon), and I was ignorant of that world of lower carbon contents. But some of my testing has now gone into that area and I have found that ignorance is bliss!!! Ms for 1050 is around 625F and it is done hardening by the time it reaches 475F, Ms for 1045 will be even higher and quenches into brine or more extreme mediums may get you to 60HRC. Do not interrupt any quenches! Get it as cold as you can as fast as you can and you may get a nice letter opener. From a hardenability and metallurgical standpoint I dont think steels below .60% C should even be considered in the high carbon category. Alloying can help things along but we are talking about 10XX series steels here.
Can you make a knife out of these steels? Yes, and you can also make a knife out of copper or aluminum. Should you make a knife out of these steels? I will leave that up to you.
The businessman in me says that I would like to sell as many knives from the hypereutectoid world as I can in a market where you may also be selling knives. That part of me says
YES!
Please! By all means use this steel instead of the ones I would use! :thumbup:
But another part of me (still not the altruistic part) that has seen too many years in the knife market realizes that your low hardness blades may actually become a hot item to the masses who have been indoctrinated by the sales pitches for silly putty knives, making my life even more difficult.

That part would say I would rather you not use those steels.
And finally the nice guy in me would tell you to do yourself a favor and not use those steels for blades. For myself, a sword made from 1050 I may hang on my wall, a knife made from 1050 I may give to a kid to use for throwing or digging in the dirt. Either made from 1045 I would simply take to the nearest scrap yard and get a few pennies to apply towards real steel. Hardened 1045 and cold worked A36 will not be that different and there is plenty of A36 laying around for free, and no need to spend any further on equipment other than a hammer
