ASTM A500 Cold Formed Welded Rectangular Tubes

Transcription

1 Nomal dimensions and sectional properties of rectangular hollow sections kg/m lb/ft kg/m lb/ft x 75 x / 3 x 1 3 / 5 0 x / 7 x 1 3 / 5 80 x / x 1 3 / 8 5 x X 100 x x 75 x x 1 / x

2 Nomal dimensions and sectional properties of rectangular hollow sections kg/m lb/ft kg/m lb/ft x 1 / x x 3 1 x / x 1 / 3 1 x x x / x 3 1 / 7 1 x / 10 x 3 1 / 7 0 x x 3 1 x x 150 x

3 Nomal dimensions and sectional properties of rectangular hollow sections kg/m lb/ft kg/m lb/ft x 0 x x 150 x x 0 x x 0 x x 300 x x 0 x x 300 x x 0 x

4 Nomal dimensions and sectional properties of rectangular hollow sections kg/m lb/ft kg/m lb/ft x x x x TOLERANCES ON SHAPE AND MASS Characteristic Circular hollow sections Outside flat Dimensions for Square and Rectangular hollow sections OD Flat dimensions. () Permissible Variations over and under flat dimensions (a).[] ½ [5] or under 0.0 [0.5] External dimensions ± 0.75% of the specified outside diameter Over ½ - 3½ [5-0] Over 3½ - 5½ [0-10] 0.0 [ 0. ] [ 0.8 ] Over 5½ [10] 0.01 times large flat dimension Thickness(T) ±10% of the specified wall thickness. Squareness of sides(ø External corner profile ± 0 The radius of each outside corner of the section shall not exceed three times the specified wall thickness OD Flat dimensions. () Max. Permissible Variations Twist per meter of length.() 1½ [0] and under 0.05 [1.3] Over 1½ - ½ [0-5] 0.0 [1.] Twist -- Over ½ - [5-100] [1.] Over - [ ] [.] Over - 8 [150-0] [.5] Over 8 [0] 0.11 [.8]

5 Nomal dimensions and sectional properties of rectangular hollow sections Straightness Length 0. % of total length [ 10 x length ( meters) divided by 5 ] -0 /+ (a) The permissible variations clude allowances for convexity and concavity. For rectangular tubg havg a ratio of outside large to small flat dimension less than 1.5, and for square tubg, the permissible variations small flat dimension shall be identical to the permissible variations large flat dimension. For rectangular tubg havg a ratio of outside large to small flat dimension the range of 1.5 to 3.0 clusive, the permissible variations small flat dimension shall be times the permissible variations large flat dimension. For rectangular tubg havg a ratio of outside large to small flat dimension greater than 3.0, the permissible variations large flat dimension. For rectangular tubg havg a ratio of outside large to small flat dimension greater than 3.0, the permissible variations small flat dimension shall be.0 times the permissible variations large flat dimension. CHEMICAL COMPOSITION : Composition % Element Grades A & B Grade C Heat Analysis Product Analysis Heat Analysis Product Analysis Carbon, max A Manganese, max A Phosphorus, max Sulfur, max Copper, m B A) For each reduction of 0.01 percentage pot below the specified maximum for carbon, an crease of 0.0 percentage pot above the specified maximum for manganese is permitted, up to a maximum of % by heat analysis and 1.0% by product analysis. B) If copper-contag steel is specified the purchase order.

6 Nomal dimensions and sectional properties of rectangular hollow sections MECHANICAL PROPERTIES: Tensile strength, m, psi [MPa] Yield strength, m, psi [MPa] Elongation. [50 ] m% Tensile strength, m,psi [MPa] Yield strength, m,psi [MPa] Elongation. [50 ] m% Round Structural Tubg Grades A Grades B Grades C [310] [30] A [00] 000 [0] B 000 [] 000 [315] C Shaped Structural Tubg Grades A Grades B Grades C [310] [00] 000 [] [70] 000 [315] [35] A 3 B 1 C A) Applies to specified wall thicknesses (to ) equal to or greater than 0.1. [3.05]. For lighter specified wall thicknesses, the mimum elongation values shall be calculated by the formula: percent elongation. [50 ] = 0.5t ,rounded to the nearest percent. For A500M use the followg formula:.t , rounded to the nearest percent. B) Applies to specified wall thicknesses (t ) equal to or greater than [.57 ]. For lighter specified wall thicknesses, the mimum elongation values shall be calculated by the formula: percent elongation. [50 ] = 0.1t + 1, rounded to the nearest percent. For A500M use the followg formula:.t + 1, rounded to the nearest percent. C) Applies to specified wall thicknesses (t ) equal to or greater than 0.1. [3.05]. For lighter specified wall thicknesses, the mimum elongation values shall be by agreement with the manufacturer. Workmanship Markg : Free from overlap, lamation, tool/roll marks, p holes, open seam & other harmful defect. : Hexagonal Type Packg : Onle stencilg as per the standard & customer requirement.