ASTM A500
ASTM A500 tube is a standard specification for cold-formed welded and seamless carbon steel structural tubing in round , square and rectangular shapes .
ASTM A500 covers cold-formed welded and seamless carbon steel round , square , rectangular , or special shape structural tubing for welded , riveted , or bolted construction of bridges and buildings , and for general structural purposes . This tubing shall be produced in both welded and seamless sizes and must have the chemical requirements of carbon , manganese , phosphorus , sulfur , and copper .
Chemical Requirements of ASTM A500uirements of ASTM A500
Composition , %
Grades A , B and D |
Grace C |
Element |
Heat |
Product |
Heat |
Product |
|
Analysis |
Analysis |
Analysis |
Analysis |
Carbon , max
Manganese , max
Phosphorus , max
Sulfur , max
Copper , when copper steel is specified , min
0.26 |
0.30 |
0.23 |
0.27 |
... |
... |
1.35 |
1.40 |
0.035 |
0.045 |
0.035 |
0.045 |
0.035 |
0.045 |
0.035 |
0.045 |
0.20 |
0.18 |
0.20 |
0.18 |
Round Structural Tubing Grade Grade A Grade B Grade C Grade D
Tensile strength , mn , ps ( MPa ) 45 000 |
58 000 |
62 00 |
58 000 |
( 310 ) |
( 400 ) |
( 427 ) |
( 400 ) |
Yield strength , mn , psi ( MPa ) 33 000 |
42 000 |
46 000 |
36 000 |
( 228 ) |
( 290 ) |
( 317 ) |
( 250 ) |
Elongation in 2 in . ( 50.8 mm ), min , % A 25B 23C 21D 23C