Steel cord with adapted elongation properties

A steel cord for the reinforcement of a rubber product comprising two or more steel elements twisted together, said steel elements comprising one or more steel filaments, said steel cord comprising in total ‘N’ steel filaments, each of said steel filaments having a cross sectional area ‘A’ expressed in square millimeters said steel elements have, after individualization and under a tension of half a newton per filament in said steel element, a center line, said center line having a helix shape with a helix pitch length ‘Lo’ in millimeter, wherein the length of the center line of the steel element over one pitch is ‘S’ millimeter,

• wherein
• the quantity ‘P’ expressed newton:
• P
• =
• π
• ⁢
• NE
• ⁡
• (
• A
• S
• )
• 2
• is larger than 50 newton and wherein ‘E’ is the modulus of steel.

A method to produce a steel cord comprising the following steps:

• (a) unwinding a number of steel elements with diameter de from spools;
• (b) providing a mandrel wire of diameter D;
• (c) twisting said steel elements around said mandrel wire with a cord number of twists Ne per unit length in a cord twist direction thereby forming an intermediate cord;
• (d) removing the mandrel wire from said intermediate cord by turning said mandrel cord out of said intermediate cord, resulting in the steel cord;
• (e) winding the steel cord on a take-up spool.