Which type of star is smaller neutron or dwarf

White dwarfs are formed from the collapse of low mass stars, less than about 10 time the mass of the Sun. This star loses most of its mass in a wind, leaving behind a core that is less than 1.44 solar mass. On the other hand,neutron stars are formed in the catastrophic collapse of the core of a massive star.

I'm not sure what your asking buddy.. but i know that you can weld two peices of steel by pure force and pressure.