No. Mashing is not the same as steeping. What equipment do you have to be able to do a mash and can you include your recipe? This info is necessary to help you with your question.
I know they are different but wanted to know if I could use less than full volume because of my small 12 quart brew pot. I was planning on mashing at 154 for an hour. I'm doing partial mash because I don't have enough DME to reach the OG.