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DIN 17173 TT St Class 35N is a standard for seamless round tubes made of fine-grain structural steel suitable for special requirements. This kind of steel pipe is mainly used in pressure vessels, chemical plants, pipeline engineering and general mechanical engineering fields, and is designed to operate at temperatures not exceeding 400°C.
DIN 17173 TT St 35N seamless steel pipe has high tensile strength and yield strength, and its minimum yield strength is usually between 255~460N/mm². Compared with ordinary carbon steel pipes, it exhibits better mechanical properties in structural and mechanical components subjected to large loads and pressures.
In addition, TT St35N carbon steel pipe has excellent toughness and is not easy to break when subjected to impact or vibration, which allows it to withstand dynamic loads. Although its corrosion resistance is slightly inferior to stainless steel pipes and other high-alloy steel pipes, it still has a certain degree of corrosion resistance and is suitable for general non-corrosive environments.
DIN TTSt35N/V DIN 17173 Mechanical
| Yield Rp0.2 (MPa) |
Tensile Rm (MPa) |
Impact KV/Ku (J) |
Elongation A (%) |
Reduction in cross section on fracture Z (%) |
As-Heat-Treated Condition | Brinell hardness (HBW) |
|---|---|---|---|---|---|---|
| 195 (≥) | 816 (≥) | 11 | 33 | 44 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 144 |
DIN TTSt35N/V DIN 17173 Physical
| Temperature (°C) |
Modulus of elasticity (GPa) |
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and | Thermal conductivity (W/m·°C) |
Specific thermal capacity (J/kg·°C) |
Specific electrical resistivity (Ω mm²/m) |
Density (kg/dm³) |
Poisson's coefficient, ν |
|---|---|---|---|---|---|---|---|
| 34 | - | - | 0.24 | - | |||
| 225 | 484 | - | 42.3 | 222 | - | ||
| 989 | - | 33 | 23.2 | 311 | 421 |
TT St35N Seamless Carbon Steel pipe
Nominal Pipe Size:3 meter, 6 meter, 9 meter or as per requirement
Size:1-2 inch, 2-3 inch, 3-4 inch, > 4 inch
Unit Length: 12 m, 18 m, 24m, or as per requirement
Chemical Properties
| Carbon | Silicon | Manganese | Phosphorous | Sulphur | Molybdenum | Nickel | Chromium | Copper | Others |
|---|---|---|---|---|---|---|---|---|---|
| max 0.17 | max 0.35 | min 0.40 | 0.03 | 0.025 | – | – | – | – | Al min 0.020 |
Gnee Steel Pipe mainly produces and operates carbon steel pipes and alloy steel pipes. Our pipes include liquid delivery pipes, structural pipes, hydraulic strut pipes, boiler pipes and bearing pipes. We typically have over 10,000 tons of pipes of various sizes and standards.
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