An inexpensive rolling apparatus improved in resistance to fretting,
acoustic performance, resistance to corrosion, life and workability is
provided. At least one of an outer member, an inner member and rolling
elements of the apparatus is formed of an alloy steel containing 1.5% by
weight or less of C, 10% to 20% by weight of Cr, 0.1% to 0.8% by weight of
Mn, 0.1% to 1.0% by weight of Si and less than 0.2% by weight of N,
particularly, at least one of the outer member, the inner member and the
rolling elements is formed of a martensitic stainless steel containing
0.6% by weight or less of C, 10% to 14% by weight of Cr, 0.1% to 0.8% by
weight of Mn, 0.1% to 1.0% by weight of Si, less than 0.2% by weight of N,
0.5% by weight or less of Mo, 0.2% by weight or less of V, and Fe and
inevitable components as the balance, wherein the relationship between the
content of C and that of Cr satisfies C %.ltoreq.-0.05 Cr %+1.41; the
relationship between a specific relational equation eq1 indicating the
content of elements accelerating the conversion of the raw material to
ferrite, taken as (eq1)=Cr %+Si %+1.5 Mo %+3.5V %, and a specific
relational equation eq2 indicating the content of elements accelerating
the conversion of the raw material to austenite, taken as (eq2)=C %+0.83 N
%+0.1 Mn %, satisfies (eq2).gtoreq.0.04.times.(eq1)-0.39,
(eq1).ltoreq.14.0 and (eq2).ltoreq.0.8; and the total content of C and N
satisfies C+N.gtoreq.0.45%.