1. Classification of SS400 Square /Rectangular hollow sections production process
Square hollow/ Rectangular hollow is divided into: hot-rolled seamless square tube, cold drawn seamless square tube, extruded seamless square tube, welded square tube.
The SS 400 welded square tube is divided into:
(A) According to the process-arc welding square tube, resistance welding square tube (high frequency, low frequency), gas welding square tube, furnace welding square tube
(B) According to the weld seam-straight seam welded square pipe, spiral welded square pipe
2. Material classification of square tube
square tube/rectangular tube is divided by material:
Plain carbon steel square tube, low alloy square tube. Common carbon steel is divided into: Q195, Q215, Q235, SS400, 20# steel, 45# steel, etc.; low alloy steel is divided into Q345, 16Mn, Q390, ST52-3, etc.
3. Standard classification of square hollow /rectangular hollow production
SS400 Square pipes /Rectangular pipes are divided into production standards: national standard square pipe, Japanese standard square pipe, British standard square pipe, American standard square pipe, European standard square pipe, and non-standard square pipe.
4. The shape classification of square pipe section
Square pipes are classified according to the shape of section:
(1) Simple section square tube-square square tube, rectangular square tube
(2) Square pipe with complex cross section-flower-shaped square pipe, open square pipe, corrugated square pipe, special-shaped square pipe
Classification of square tube surface treatment
Square tube/Rectangular tube is divided into surface treatment:
Hot-dip galvanized square pipe,
Electro-galvanized square pipe/rectangular pipes, oil-coated square pipe, pickling square pipe
6. Classification of square tubes
Square pipes/rectangular pippes are classified by purpose-square pipes for decoration, square pipes for machine tools, square pipes for machinery industry, square pipes for chemical industry, square pipes for steel structures, square pipes for shipbuilding, square pipes for automobiles, square pipes for steel beams and columns Tube, special purpose square tube
Product Type | EN-10025-2 Grade SS400 Rectangular Hollow Section |
Specification | OD15*15mm-400*400mm |
OD | 15*15-400*400mm, WT0.8-12.0mm |
Wall Thickness | 0.8~12.0mm |
Standard | GB, BS, ASTM |
Steel material | Q195. Q215, Q235, Q345 |
Size length | 15mm-400mm, WT: 0.313mm |
Surface Treatment | Bared, Black Painted (varnish coating), Galvanized, With Oiled, 3 PE, FBE, corrosion resistant coating |
Section Shape | Square and rectangular |
Package | Bundle, In Bulk, Bags square galvanised steel hollow section tube, Clients’ Requirements |
USA | Germany DIN,WNr |
Japan JIS |
France AFNOR |
England BS |
Canada HG |
European old EN |
Belgium NBN |
Spain UNE |
A283D A529 Gr.D |
RSt42-2 St 44-2 |
SS400 | E28-2 | 161-430 43A 43B |
260W 260WT |
Fe430B | AE295B | AE255B |
C
|
Mn
|
P
|
S
|
N
|
Cu
|
CEV
|
max 0.22
|
max 1.5
|
max 0.04
|
max 0.04
|
max 0.012
|
max 0.55
|
max 0.42
|
Minimum yield strength Reh MPa |
Tensile strength Rm MPa |
Minimum elongation – A Lo = 5,65 * √So (%) |
Notch impact test | |||||||||||
Steel grade | Nominal thickness mm |
Nominal thickness mm |
Nominal thickness mm |
Temperature | Min. absorbed energy | |||||||||
≤16 | >16 ≤40 |
>40 ≤63 |
>63 ≤80 |
>80 ≤100 |
>100 ≤125 |
>3 ≤100 |
>100 ≤125 |
>3 ≤40 |
>40 ≤63 |
>63 ≤100 |
>100 ≤125 |
°C | J | |
SS400 | 275 | 265 | 255 | 245 | 235 | 225 | 410-560 | 400-540 | 23 | 22 | 21 | 19 | +20 | 27 |
SS400 Rectangular and Square Hollow Section Specifications:
Square & Rectangular Steel Pipe Size Chart | ||
Square Hollow Section | Rectangular Hollow Section | Thickness |
10*10 20*20 25*25 30*30 | 10*20 20*40 30*40 | 1.2-3.0 |
40*40 50*50 | 30*50 25*50 30*60 40*60 | 1.2-4.75 |
60*60 | 50*70 40*80 | 1.2-5.75 |
70*70 80*80 75*75 90*90 100*100 | 60*80 50*80 100*40 120*80 | 1.5-5.75 |
120*120 140*140 150*150 | 160*80 100*150 140*80 100*180 200*100 | 2.5-10.0 |
160*160 180*180 200*200 | 200*150 250*150 | 3.5-12.0 |
250*250 300*300 400*400 450*450 350*350 | 250*200 300*200 350*200 350*250 450*250 400*300 500*200 | 4.5-15.75 |
400*400 500*500 550*550 600*600 | 400*350 400*250 500*250 500*300 400*600 | 5.0-20.0 |