The result is the weight of round steel per meter, and then multiply by the length (m) to get the weight of the corresponding round steel bar. Example: For rebar with a diameter of 75mm and a length of 5.85m, round steel φ 75 mm (diameter) ×5.85m (length) formula: diameter mm× diameter mm×0.006 17× length m calculation: 75× 75× 0.00617× 5.88. Calculation formula of round steel weight: round steel weight = bottom area x height (or length) x material density = volume x material density For example: diameter D=75mm=7.5cm, then: R=375cm, length H=5850mm=58.5cm, if round steel density is M=7.85g/cm3, then: round steel weight g =
Theoretical weight of steel: the theoretical weight of steel is the weight calculated according to the nominal size and density of steel (called specific gravity in the past), which is called theoretical weight. This is directly related to the allowable deviation of steel length, cross-sectional area and size. Due to the allowable deviation of dry steel in the manufacturing process, the theoretical weight calculated by the formula is different from the actual weight, which is only used as a reference for estimation.
Actual weight of steel: the actual weight of steel refers to the weight of steel obtained by actual weighing (weighing), which is called actual weight. The actual weight is more accurate than the theoretical weight.
Calculation method of steel weight
(1) Gross weight: it is the symmetry of "net weight". Is the total weight of steel itself and packaging materials. When calculating freight, a transport enterprise shall calculate the freight by gross weight. However, the purchase and sale of steel products are calculated by net weight.
(2) Net weight: it is the symmetry of "gross weight". The gross weight of steel minus the weight of packaging materials, that is, the actual weight, is called net weight. In the purchase and sale of steel, it is generally calculated by net weight.
(3) Tare weight: the weight of steel packaging materials, called tare weight.
(4) Weight ton: the weight unit of freight is calculated according to the gross weight of steel. Its legal units of measurement are tons (1000kg) and long tons (British weight unit 10 16. 16kg) and short tons (American weight table 907. 18kg).
(5) Billing weight: also known as "billing ton" or "freight ton". The weight of steel collected by the transportation department. Different modes of transportation have different calculation standards and methods. Such as railway vehicle transportation, the marked load of second-hand trucks is generally used as the charging weight. Highway transportation charges freight according to the vehicle's deadweight tonnage, and the vibration of railway and highway is based on the minimum weight of the hand. If it is kilograms, it will be rounded off when the weight is insufficient.
The difference between round steel and steel bar
1, different components:
Round steel (first grade steel) belongs to ordinary low carbon steel; Other steel bars are mostly alloy steel.
2, the intensity is different:
Round steel has low strength, while other steels have high strength, that is, round steel with the same diameter is the same as other steel bars. Round steel bears less tension than other steel bars, but it is stronger than other steel bars, that is, pulling round steel. There is great deformation before fracture; The deformation of other steel bars before being pulled off is much smaller.