I used to mine Bitcoins and Altcoins. Here is the list of ASIC miners that I used.
- This is the first Miner I got from Butterfly Labs in 2013. It is the first generation 60ghs ASIC miners.

- This is another Butterfly Lab's 5ghs Jalapeño ASIC miner.

- This is the Butterfly Lab's Monarch. I ordered it, It was never delivered nor given a refund. :(

- These are ASICMiner Block Erupter with 330MH/s.

- These are Gridseed Dual-ASIC miners for both Bitcoin and Litecoin.

I was hacked twice in 2014, lost some Bitcoins and Altcoins. These ASIC miners had been on the shelf since and was never used again. :(
Can they be used to mine steem?
No, only Bitcoin and Altcoins.