Wholesale 20-200mm Square Rectangular Steel Pipes HSS Tubes for Building and Machinery
Manufacturing Process
(1)Hot Rolled: Produced at high temperature to enhance strength and ductility.
(2)Cold Formed: Shaped at room temperature for precise dimensions and smooth surface.
(3)Galvanized: Coated with zinc to protect against rust and corrosion.
(4)Black Annealed: Treated with heat to improve hardness and machinability.
Square and Rectangular Pipe Standards
IOS 10799, ASTM A500, ASTM A513, EN 10219, EN10210, JIS G3466, GB/T 6728, ANSI/AISC 360, DIN 2395, BS 1387, AS/NZS 1163, etc.
Welded Steel Pipe Steel Grade
According to different application environments, choose the appropriate steel grade.
| ASTM | EN | JIS | GB |
| ASTM A36 | S195 | SS330 | Q195 |
| ASTM A283 GrC | S235JR | SS400 | Q215 |
| ASTM A283 GrD | S235JR | SS400 | Q235 |
| ASTM A572 Gr50 | S355JR | SM490 | Q345 |
| ASTM A572 Gr60 | S355J2 | SM520 | Q390 |
| ASTM A572 Gr65 | S420ML | SM570 | Q420 |
| ASTM A572 Gr70 | S460ML | SM570 | Q460 |
| ASTM A513 Type5 | C22 | S20C | 20# |
| ASTM A513 Type6 | C45 | S45C | 45# |
Normal sizes
(1)Square Pipe
| ASTM | EN | JIS | GB |
| 3/4” * 3/4” | 20*20 | 20*20 | 20*20 |
| 1” * 1” | 25*25 | 25*25 | 25*25 |
| 1-1/4” * 1-1/4” | 30*30 | 30*30 | 30*30 |
| 1-1/2” * 1-1/2” | 40*40 | 40*40 | 40*40 |
| 2” * 2” | 50*50 | 50*50 | 50*50 |
| 2-1”2 * 2-1”2 | 60*60 | 60*60 | 60*60 |
| 3” * 3” | 80*80 | 80*80 | 80*80 |
| 4” * 4” | 100*100 | 100*100 | 100*100 |
| 5” * 5” | 120*120 | 120*120 | 120*120 |
| 6” *6” | 150*150 | 150*150 | 150*150 |
(2)Rectangular Pipe
| ASTM | EN | JIS | GB |
| 3/4” * 1/2” | 20*10 | 20*10 | 20*10 |
| 1-1/4” * 1/2” | 30*15 | 30*15 | 30*15 |
| 1-1/2” * 3/4” | 40*20 | 40*20 | 40*20 |
| 2”*1” | 50*25 | 50*25 | 50*25 |
| 2-1/2” * 1-1/4” | 60*30 | 60*30 | 60*30 |
| 3” * 1-1/2” | 80*40 | 80*40 | 80*40 |
| 4” * 2” | 100*50 | 100*50 | 100*50 |
| 5” * 2-1/2” | 120*60 | 120*60 | 120*60 |
| 6” * 3” | 150*75 | 150*75 | 150*75 |
| 8” * 4” | 200*100 | 200*100 | 200*100 |
Advantages
1.High strength and stable structure.
2.Good corrosion resistance.
3.Excellent load-bearing capacity.
4.Easy to process and install.
5.Complete specifications in stock.
6.Cost-effective and durable.
Packaging and Shipping
Standard export packing. The modes of transportation include containerized sea freight, bulk sea freight, air freight, land transportation, and multi-modal transportation.
fAQ
Q1: What steel grades are available?
A:We offer a full range of steel grades to meet global standards, covering general structural and high-strength applications.
Q2: How do I choose the right steel grade?
A:Select based on your project’s application environment, load requirements, and regional standard.
Q3: What square pipe sizes do you offer?
A:We provide standard square pipe sizes in both imperial and metric dimensions, covering a wide range for structural use.
Q4: What rectangular pipe sizes are available?
A:Our rectangular pipes come in standard imperial and metric sizes, suitable for various construction and engineering needs.
Q5: Can I get custom sizes or steel grades?
A:Yes, we accept custom orders for non-standard sizes and steel grades. Please contact our sales team for details.
Q6: Are sizes consistent across different standards?
A:Most common sizes are equivalent across ASTM, EN, JIS, and GB, ensuring global project compatibility.