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Home » Product List » Steel Pipe & Tube » Tube for Structural Purposes (GB/T 8162-1999)
Product Details
Tube for Structural Purposes (GB/T 8162-1999)
| Model NO.: | GB/T 8162-1999 |
|---|
Product Description
Application: Used in the general structure and the mechanism, including construction, machinery, transportation, aviation, petroleum mining and each kind of structural tubes.
Note: Other Alloy tubes can also be provided by agreement
Pipe types | Pipe size mm | Tolerances ( Standard) | |
| Hot rolled | OD D | <50 | ±0.50mm |
| ≥50 | ±1% | ||
| WT s | <4 | ±12.5%( ±0.40mm)min | |
| ≥4~20 | +15% -12.5% | ||
| >20 | ±12.5% | ||
| Cold drawn | OD D | 6~10 | ±0.20mm |
| 10~30 | ±0.40mm | ||
| 30~50 | ±0.45mm | ||
| >50 | ±1% | ||
| WT s | ≤1 | ±0.15mm | |
| >1~3 | +15% -10% | ||
| >3 | +12.5% -10% | ||
Mechanical Properties :
| Item NO | Grade | Tensile Strength σb Mpa | Yield Strengthσ0.2, Mpa | Elongationδ5 % | H(Flattening test dull spacing) mm | ||
| WT | |||||||
| ≤16mm | >16~30mm | >30mm | |||||
| MIN | |||||||
| 1 | 10 | 335 | 205 | 195 | 185 | 24 | 2/3D |
| 2 | 20 | 390 | 245 | 235 | 225 | 20 | 2/3D |
| 3 | 35 | 510 | 305 | 295 | 285 | 17 | ------- |
| 4 | 45 | 5590 | 335 | 325 | 315 | 14 | -------- |
Chemical composition:
| Standard | Grade | C | Si | Mn | P≤ | S≤ | Cu≤ | Ni≤ | Cr≤ | Mo≤ | V≤ |
| GB/T 8162 | 10 | 0.07-0.14 | 0.17-0.37 | 0.35-0.65 | 0.035 | 0.035 | 0.25 | 0.25 | 0.15 | / | / |
| 20 | 0.17-0.24 | 0.17-0.37 | 0.35-0.65 | 0.035 | 0.035 | 0.25 | 0.25 | 0.25 | / | / | |
| 35 | 0.32-0.39 | 0.17-0.37 | 0.50-0.80 | 0.035 | 0.035 | 0.25 | 0.25 | 0.25 | / | / | |
| 45 | 0.42-0.50 | 0.17-0.37 | 0.50-0.80 | 0.035 | 0.035 | 0.25 | 0.30 | 0.25 | / | / |
