Generally the mesh measurement for powder steels work like the numbers for sandpaper..... the higher the number, the finer the powder. From a visual reference, 120 mesh 1084 powder looks like large grains of sugar. The only way I can think to describe the 1095 powder is..... looks and feels finer then flour.
You have to buy the steel and nickel powders separate, and mix them..... When I receive the powders they are in what appears to be new/clean paint cans. I generally get a gallon sized can of 1095, and a 1/2 pint can of pure nickel powder. I dump the nickel powder into the 1095 can, and take it to my local hardware store, and have them put it in their paint mixer for about 5 mins. That gets things mixed evenly, and then it's ready for use.
I don't think I would use the 1095/nickel mix for canister welding the bearings.... the nickel will cause the powder portions of the billet to be fairly bright, and give you less contrast with the bearings. If I were doing a canister of bearings, I'd use straight 1095 powder as it will etch out much darker then if nickel is added.
I'm not sure where to send you to purchase the amount you're looking for..... might just take some digging on your part. Don't fall off your chair when you hear the prices.....especially for nickel powder.
