Product Description GB/T8162 Seamless Square Steel Pipe
GB/T8162 is a standard seamless Square pipe, suitable for seamless pipes in general structures and mechanical structures. The parts after quenching and tempering of GB/T8162 seamless steel pipe have good comprehensive mechanical properties and are widely used in various important structural parts, especially those connecting rods, bolts, gears and shafts that work under alternating loads. However, the surface hardness is low and not wear-resistant. Quenching and tempering, as well as surface quenching can be used to improve the surface hardness of the parts.
Product Parameters
| Product Name | GB/T8162 Seamless Square Steel Pipe | |
| Standard | EN/DIN/JIS/ASTM/BS/ASME/AISI etc. | |
| Outer Diameter | Seamless: 1/4″-36″ | Welding: 21.3mm-3620mm |
| Round Tube: 1/2″-10″ | Square Tube/Rectangular Tube: 15x15mm-400x600mm | |
| Wall Thickness | Seamless: 1.25mm-50mm | Welding: 1.65mm-65mm |
| Length | 3-12 meters, Support customization | |
| Surface Process | Bright, Polished, Black | |
| Other Services | Machining(cnc), Centerless Grinding(cg), Heat Treatment, Annealing, Pickling, Polishing, Rolling, Forging, Cutting, Bending, Small Machining, etc. | |
Chemical Composition
| Grade | C | Si | Mn | P, S | Cu | Ni | Mo | Cr |
| 10 | 0.07-0.14 | 0.17-0.37 | 0.35-0.65 | ≤ 0.035 | ≤ 0.25 | ≤ 0.25 | / | ≤ 0.15 |
| 20 | 0.17-0.24 | 0.17-0.37 | 0.35-0.65 | ≤ 0.035 | ≤ 0.25 | ≤ 0.25 | / | ≤ 0.25 |
| 35 | 0.32-0.40 | 0.17-0.37 | 0.50-0.80 | ≤ 0.035 | ≤ 0.25 | ≤ 0.25 | / | ≤ 0.25 |
| 45 | 0.42-0.50 | 0.17-0.37 | 0.50-0.80 | ≤ 0.035 | ≤ 0.25 | ≤ 0.25 | / | ≤ 0.25 |
| 16Mn | 0.12-0.20 | 0.20-0.55 | 1.20-1.60 | ≤ 0.035 | ≤ 0.25 | ≤ 0.25 | / | ≤ 0.25 |
| 12CrMo | 0.08-0.15 | 0.17-0.37 | 0.40-0.70 | ≤ 0.035 | ≤ 0.25 | ≤ 0.30 | 0.40-0.55 | 0.40-0.70 |
| 15CrMo | 0.12-0.18 | 0.17-0.37 | 0.40-0.70 | ≤ 0.035 | ≤ 0.25 | ≤ 0.30 | 0.40-0.55 | 0.80-1.10 |
| 12Cr1MoV | 0.08-0.15 | 0.17-0.37 | 0.40-0.70 | ≤ 0.035 | ≤ 0.25 | ≤ 0.30 | 0.25-0.35 | 0.90-1.20 |
Mechanical Properties
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
| 10 | ≥ 335 | ≥ 205 | ≥ 24 |
| 20 | ≥ 390 | ≥ 245 | ≥ 20 |
| 35 | ≥ 510 | ≥ 305 | ≥ 17 |
| 45 | ≥ 590 | ≥ 335 | ≥ 14 |
| 16Mn | ≥ 490 | ≥ 325 | ≥ 21 |
| 12CrMo | ≥ 410 | ≥ 265 | ≥ 24 |
| 15CrMo | ≥ 440 | ≥ 295 | ≥ 22 |
| 12Cr1MoV | ≥ 490 | ≥ 245 | ≥ 22 |
Product Specifications
| Specifications（mm） | Specifications（mm） |
| 20*20*1.0 | 80*80*3.5 |
| 25*25*1.8 | 80*80*7.75 |
| 25*25*2 |
100*100*11.75 |
| 25*25*2.5 | 100*100*2.75 |
| 25*25*2.75 | 100*100*3.75 |
| 250*250*9.5 | 100*100*4.75 |
| 30*30*0.7 | 100*100*7.75 |
| 30*30*1.5 | 120*120*2.75 |
| 30*30*1.8 | 120*120*4.75 |
| 30*30*2 | 150*150*11.75 |
| 30*30*2.5 | 150*150*3.75 |
| 30*30*2.75 | 150*150*5.75 |
| 40*40*1.5 | 180*180*8 |
| 40*40*2.5 | 200*200*4.75 |
| 50*50*2.5 | 200*200*7.5 |
| 50*50*2.5 | 200*200*7.75 |
| 50*50*3.0 | 300*300*11.75 |
| 50*50*3.5 | 300*300*12 |
| 50*50*3.5 | 300*300*9.75 |
| 60*60*2.5 | 400*400*11.5 |
| 60*60*3.0 | 400*400*11.75 |
| 80*80*2.5 | 500*500*11.75 |
| The above are the general items, for the special types, we can also meet your needs. | |
Carbon steel pipes are made from perforated steel ingots or solid round steel, and then hot rolled, cold rolled, or cold drawn. Commonly used materials include A53/A106/APl Spec5L/A179/A213//A335/SSAW etc.
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