What we ask is for the small grains to be 20 micrometers. The spherical 50% and crushed 50%. Is it possible to have the spherical parts no bigger than 313 micrometers? If we send you a piece of the rod №1 can you analyse its chemical and physical composition and make us the same kind? We use oxygene-acetylene welding. For now we assume that the chemical composition should be like this C total 4 W balance Fe 0,02-0,03 Cr 2,8-4,0 Magnetic impurities 0,02-0,03 Length 60 mm Diameter 4 mm Show More