Do you mean like having actual calculations for what the exact value is for doing such feats?
The wall one you put, for instance, should be wall level of course. But having an actual calc for how much wouldn't really hurt for any of us here.
For the second one you put, that's a bit or so hard to say. Do you mean in like a short amount of time? A while? A long time like many years? Pretty sure you'd want to have that factor'd in.
I do like the idea that we could try this and add it to the comprehensive scale pages we have. This way, other users here will have something to go by rather than guess-working it. Not that guess-working is wrong cause, at least to me, having a calculation is nothing more than just another way of tiering characters....or just another way of solifying their tiers and stats.
Either way, a good possible suggestion to have here.
The diameter of the observable universe is 93,000,000,000 Light Years
π * 93,000,000,000 = 292,168,116,784 Light Years
Simply divide that by the timeframe and time unit to find a result. I.E:
292,168,116,784 Light years / 1 Attosecond = 2.76406477 × 10^45 m/s
Note: This assumes that the Observable Universe is spherical in nature.
The first one is a bit trickier. The hardness of Steel (I presume one of the harder variants) is 1550 N/mm^2, or 1550 MPa. However, I'm not quite sure how to find the value 10 times greater then that. I feel as if simply timing that by 10 would be disingenuous, so I can't really help you there. Sorry.
2.76406477 × 10^45 / 2.998e+8 = 9.2196957e+36c. So about 9.2 Undecillion times. Of course, I used a incredibly low timeframe as just an example. Using a minute is "only" in the Quadrillions
We effectively already have this the form of the Calculations article over on the main wiki. It list the j/cm^3 values for many types of materials in many different destruction forms. Including Steel and multiple methods of destroying it. Although, I have been thinking of adding more materials to it, such as Wood, Coal, Plaster, Copper, Tin, Marble, etc.