Grade,100% c simn PS ceq HRB335 0.25 0.8010.60 0.045 0.045 0.52 HRB400 0 0.25 0.8010.600 0 0.045 0.54 HRB5000 0 0.25 0.80.

Mechanical properties * *% * ★ GB 2649-1989 Mechanical test method for welded joints ★ GB2650- 1989 Impact test method for welded joints ★ GB 2651-KLOC-0/989 Tensile test method for welded joints ★

General algorithm 1, the weight of steel bar (bar) per meter = diameter square × 0.00617×1m. 0.006 17 is the theoretical weight φ 10 diameter 12 and below, with three decimal places reserved; Diameter of more than two decimal places12; Stay time becomes 6 rounds 7! 2. Weight per meter 6 mm 8 mm 0.222 kg 0.395 kg Weight per meter10 mm12 mm 0.616 kg Weight per meter 0.888 kg multiplied by 0.222 divided by the formula L D multiplied by 36 equals N kg. For example, steel with a diameter of 28 is 500 meters long. How many tons are there? 500 * 0.222/36 * 28 * 28 = 2417.33kg equals 2.42 tons.