Spiral steel pipe itself has no life limit, and the service life is mainly related to the operating environment and production process. Spiral steel pipe operating environment is relatively poor In order to extend the service life, the oute.
ST20 GOST8734-75 steel pipe
ST20 GOST STANDARD STEEL PIPE
Standard: Gost 8734 seamless pipe
Size(mm): O. D. 6-168 mm W. T. 1-15 mm L max 12000 mm
Delivery condition: Hot rolled, Cold worked, Annealed, Normalized, Stress Released
Certificate: ISO9001 TUV
Packing: 1. Standard export bundle wrapped with strong steel strip
2. Wooden case
3. Nylon packed
Payment: T/T
Delivery: With 40 days of order confirmation
Your special requirement is highly welcomed and will be fulfilled.
We always provide highest quality seamless pipe/tube and best service.
| Steel Grade | C | Si | Mn | Cr | Ni | Mo | S | P | Cu |
| 10 | 0.07-0.14 | 0.17-0.37 | 0.35-0.65 | 0.15 | 0.3 | --- | --- | --- | --- |
| 20 | 0.17-0.24 | 0.17-0.37 | 0.35-0.65 | 0.25 | 0.25 | --- | 0.03 | 0.025 | 0.3 |
| 35 | 0.32-0.40 | 0.17-0.37 | 0.50-0.80 | 0.25 | 0.3 | --- | 0.04 | 0.035 | 0.3 |
| 45 | 0.42-0.45 | 0.17-0.37 | 0.50-0.80 | 0.25 | --- | --- | --- | --- | --- |
| 40X | 0.36-0.44 | 0.17-0.37 | 0.50-0.80 | 0.80-1.10 | 0.3 | --- | 0.035 | 0.035 | 0.3 |
| 30CTCA | 0.28-0.34 | 0.90-1.20 | 0.80-1.10 | 0.80-1.10 | 0.3 | --- | 0.05 | 0.025 | --- |
Mechanical Property
| Steel Grade | Tensile strength, N/mm2 (min) | Yield strength | Elongation, % min |
| 10 | 343 | 206 | 24 |
| 20 | 412 | 245 | 21 |
| 35 | 510 | 294 | 17 |
| 45 | 589 | 323 | 14 |
| 40X | 618 | --- | 14 |
| 30CTCA | 491 | --- | 18 |
3 Comments
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