GMAW solid wire for 1.25% Cr 0.5% Mo alloyed boiler, plate and tube steels as well as for the welding of quenched and tempered and case hardening steels. Preferably used for the steels 13CrMo4-5 or ASTM A335 P11/P12. Approved in long-term service up to 570°C. The deposit is noted for its good mechanical properties and good toughness with good resistance to cracking in caustic soda. Creep rupture strength values are within the scatter band of the base material 13CrMo4-5.