First of all the Outfit no longer gives bonus to armorcrafting - it's bonus to forging. Then it's the current durability of the BS shop that matters, not the maximum one.
My BS shop is 16 800 durability right now, I have 100 skill. Took 3 bars of q63 iron and made wires with: 60q hammer = 52q wire 80q hammer = 53q wire 100q hammer = 57q wire
If your armorsmithing skill is at 88, you're using a Q80 blacksmith's hammer, a Q95 Blacksmith's Shop (equals 19200 durability) and Q62 iron bars, then there is no way that the resulting quality of the wire is only 31. It would be somewhere between 52 and 55.
Are you absolutely sure that you're looking at the armorsmithing skill and not the forging skill and that the hammer is really Q80?