What are the differences ?
The 5 types of STEPHEN PAULELLO wires result from two different aspects of their manufacturing:
choosing raw material according to its composition
perfecting methods of wire drawing which modify several mechanical or chemical parameters: speed through the dies, rate of metal deformation, temperature, lubricant …
This results in 5 degrees of mechanical performance, from highly traction resistant steel (Type XM), to almost pure, less resistant iron, resembling early XIXth century stringings (Type 2).
Breaking loads extend from 3000 N/mm2 (type XM’s small diameters) to 1000 N/mm2 (type 2’s large diameters) modern stringings
Tables of characteristics of the 5 Types of wires