1.Product Description:  rectangular hollow section 

electric-resistance-welded
item Chemical composition max % Item mechanical property
steel C % Mn % S % P % Si % steel yield point Mpa tensile strength Mpa elongation %
Grade A 0.25 0.95 0.045 0.05 -- Grade A 205 (min) 330 (min) 26-30
Grade B 0.3 1.2 0.045 0.05 -- Grade B 240 (min) 415 (min) 21-26
Quality Standard: ASTM A53 ASTM A500 Standard Specification for Pipe, Black,and Hot-Dipped, Zinc-Coated, Welded and Seamless

 

chemical requirement   mechanical property shaped structural tubing
Element Composition. %   Grade A Grade B Grade C Grade D
Grade A, B and D Grade C tensile strength,min, psi 45000 58000 62000 58000
Heat 
Analysis		 Product
Analysis		 Heat 
Analysis		 Product
Analysis		 Mpa 310 400 427 400
yield strength, min, psi 33000 42000 46000 36000
C, max 0.26 0.30 0.23 0.27 Mpa 228 290 317 250
Mn, max … … 1.35 1.40 elongation in 2in. (50.8mm),min % 25 23 21 23
P, max 0.035 0.045 0.035 0.045 quality standard: ASTM A500 standard Specification for Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in
Rounds and Shapes
S, max 0.035 0.045 0.035 0.045
Copper,(when   specified) min 0.20 0.18 0.20 0.18

 

steel grade mnimum yield strength Mpa tensile strength Mpa mnimum elongation
specified thickness mm specified thickness mm specified thickness
steel name steel number < = 16 17 - 40 41 - 63 64 -80 81 - 100 101 - 120 < = 3 4 - 100 101 - 120 < = 40 41--63 64--100 101--120
S235JRH 1.0039 235 225 215 215 215 195 360--510 360--510 350--500 26 25 24 22
S275JOH 1.0149 275 265 355 245 235 225 430--580 410--560 400--540 23 22 21 19
S275J2H 1.0138
S355JOH 1.0547 355 345 355 325 295 295 510--680 470--630 450--600 22 21 20 18

 

 

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