Hunan Great Steel Pipe Co.,Ltd is a world-class production and service provider of submerged arc straight seam welded pipe as the first subsidiary of Shinestar Group. Hunan Great Steel Pipe Co.,Ltd pays more attention to in the pipeline engineering research areas as a pioneer of China Petroleum Pipeline & Gas Pipeline Science Research Institute.
Rectangular steel tubing offers high strength, durable, and long-lasting performances in assemblies across industries.We offer rectangular steel tubing made from a variety of materials in both mechanical and structural grades:
Carbon Steel Rectangular Tubing
Galvanized Steel Rectangular Tubing
Stainless Steel Rectangular Tubing
Our selection of rectangular steel tube sizes ranges from 3/8” x 1-1/2” up to 12” x 20”. We also offer many value-added tubing services to deliver rectangular steel tube that better meets the needs of your project, including high-precision laser cutting, saw cutting, and others.
Chemical composition of material
| Grade | element | C | Mn | P | S |
| ASTM A500 Gr.b | % | 0.05%-0.23% | 0.3%-0.6% | 0.04% | 0.04% |
| Acc.to EN10027/1 | Acc.to EN10027/2 | C% max (Norminal W.T.(mm) | Si% max | Mn% max | P% max | S% max | N% max | |
| and IC 10 | ≤ 40 | |||||||
| S235JRH | 1.0039 | 0.17 | 0.2 | – | 1.4 | 0.045 | 0.045 | 0.009 |
| S275JOH | 1.0149 | 0.2 | 0.22 | – | 1.5 | 0.04 | 0.04 | 0.009 |
| S275J2H | 1.0138 | 0.2 | 0.22 | – | 1.5 | 0.035 | 0.035 | – |
| S355JOH | 1.0547 | 0.22 | 0.22 | 0.55 | 1.6 | 0.04 | 0.04 | 0.009 |
| S355J2H | 1.0576 | 0.22 | 0.22 | 0.55 | 1.6 | 0.035 | 0.035 | – |
Mechanical properties of material
| Grade | Yield Strength | Tensile Strength | Elongation |
| A500.Gr.b | 46 ksi | 58 ksi | 23% |
| A513.GR.B | 72 ksi | 87 ksi | 10% |