Shandong seamless steel pipe square pipe joint party manufacturers supply special word of mouth square steel fānggāng [square steel], or processed into rolled steel square section steel density: 7.851g/cm3 steel theoretical weight of steel weight measurement theory in kilograms (kg). The basic formula is: W (weight, kg) = F (basal area mm2) × L (length, m) × ρ (density, g/cm3) × 1 / 1000 square steel can be divided into two kinds of hot and cold ; hot-rolled square steel side 5-250mm, cold drawn square steel side 3-100mm. Side length of square steel Size (mm) cross-section area (cm2) Theoretical Weight (kg / m) 
 Side length (mm) cross-section area (cm2) Theoretical Weight (kg / m)