ASTM A572 longitudinal welded steel pipes are high-strength low-alloy structural steel tubes characterized by their elevated strength and excellent weldability. By adding small amounts of alloying elements (such as vanadium, niobium, etc.), these steels achieve higher strength while reducing weight by 15%-20% compared to ordinary carbon steel for equivalent load-bearing capacity. This makes them particularly popular in construction and bridge applications.
Specification
Size : OD:406-1422.40mm WT:1.65-40mm, Length: 6mtr-20mtr
Standard & Grade :ASTM A572 Grades 42, 50, 55,60,65
Ends:Square Ends/Plain Ends (straight cut, saw cut, torch cut), Beveled/Threaded Ends
Coating: 3PE Coating;3PP Coating;FBE Coating;Epoxy Coating;Special Painting
Chemical Composition
|
Type A |
Elements |
Heat Analysis, % |
|
1 |
Columbium |
0.005-0.05B |
|
2 |
Vanadium |
0.01-0.15C |
|
3 |
Columbium |
0.005-0.05B |
|
4 |
Vandadium |
0.01-0.15C |
|
5 |
Columbium plus vanadium |
0.02-0.15D |
|
6 |
Titanium |
0.006-0.04 |
|
7 |
Nitrogen |
0.003-0.015 |
|
8 |
Vanadium |
0.06 max |
A: Alloy content shall comply with Type 1, 2, 3, or 5 and shall be on test report.
B: Product analysis limits = 0.004 to 0.06%.
C: Product analysis limits = 0.005 to 0.17%.
D: Product analysis limits = 0.01 to 0.16%.
Mechanical Properties
|
Grade |
Yield Point, min |
Tensile Strenth, min |
Minimum Elongation, % B,C,D |
|||
|
kis |
[MPa] |
ksi |
[MPa] |
in 8 in [200 mm] |
in 2 in [200 mm] |
|
|
42 [290] |
42 |
[290] |
60 |
[415] |
20 |
24 |
|
50 [345] |
50 |
[345] |
65 |
[450] |
18 |
21 |
|
55 [380] |
55 |
[380] |
70 |
[485] |
17 |
20 |
|
60 [415] |
60 |
[415] |
75 |
[520] |
16 |
18 |
|
65 [450] |
65 |
[450] |
80 |
[550] |
15 |
17 |
A: Specimen shall comply with Specification of A6/A6M.
B: Elongation not required to be determined for floor plate.
C: For wide flange shapes over 426 lb/ft [634 kg/m], elongation in 2 in. [50 mm] of 19% minimum applies.
D: For plates wider than 24 in. [600 mm], the elongation requirement is reduced two percentage points for Grade 42, 50, and 55 [290,345,and 380], and three percentage points for Grade 60 and 65 [415 and 450]. See elongation requirement adjustment in the Tension Tests section of Specification A6/A6M.
GNEE ASTM A572 LSAW steel pipe for sale
