A 0.6 millimeter thick material required nine tons of open hem per meter for hemming and seaming, which creates a seam along an edge of sheet metal.
Tons per meter requirement for hemming cold-rolled steel and stainless steel 0.6 9 Hemming and seaming are two similar metalworking processes in which a sheet metal edge is rolled over onto itself. Hemming is the process in which the edge is rolled flush to itself, while a seam joins the edges of two materials. 
