In this paper, two kinds of reinforced conductors, with high strength
and high conductivity are discussed: stainless steel clad copper wires
(sigma(uts)(77 K) = 1370 MPa for 50% of stainless steel) and copper w
ires with 9 million continuous filaments of niobium (sigma(uts)(77 K)
= 1050 MPa for 25% of niobium; resistivity ratio from 273 to 77 K: 5.4
3).