Thick-walled stainless steel pipes refer to stainless steel pipes with a wall thickness of 10-50.0 mm, while those with a wall thickness of more than 50 mm are called extra-thick-walled stainless steel pipes. These pipes play a key role in many industrial fields with their excellent corrosion resistance, high temperature resistance, good mechanical properties and processing performance. According to the different materials, thick-walled stainless steel pipes can be divided into many types, such as 304, 316L, 310S, etc. Each material has its own unique chemical composition and physical properties.
The thick-walled stainless steel pipes produced by our company have a smooth surface, no cracks, no burrs, and no pits, and the specifications are also complete.
2205 alloy (UNS S32305/S31803) is a duplex stainless steel composed of 22% chromium, 3% molybdenum and 5-6% nickel-nitrogen alloy. It has high strength, good impact toughness and good overall and local resistance to strong corrosion.
Compared to 316L and 317L austenitic stainless steels, 2205 alloy has superior performance in pitting and crevice corrosion resistance, it has high corrosion resistance, lower thermal expansion coefficient and higher thermal conductivity than austenite.
Compared to austenitic stainless steels, it has twice the compressive strength, designers can reduce its weight and cost compared to 316L and 317L.
316l stainless steel thick wall pipe chemical composition（%）
C≤0.03
Si≤1.00
Mn≤2.00
P≤0.035
S≤0.03
Ni:12.0-15.0
Cr:16.0-18.0
Mo:2.0-3.0
· Round tube specifications (outer diameter x wall thickness range)
| Outer diameter（mm） | Wall thickness range（mm） | Application Areas |
|---|---|---|
| φ20.5 | 1.0~2.0 | Mechanical parts, precision instruments |
| φ25.4 | 1.0~3.0 | Hydraulic system, structural support |
| φ38.1 | 1.0~3.0 | Chemical equipment, pipeline connection |
| φ50.8 | 1.0~4.5 | Building structure, load-bearing frame |
| φ76.2 | 1.0~5.6 | Industrial equipment, high pressure pipelines |
| φ101.6 | 1.35~5.6 | Shipbuilding, energy transmission |
| φ114.3 | 1.35~5.6 | Oil and gas pipelines |
| φ219.08 | 2.0~5.6 | Large structures and bridge engineering |
| φ355.5 | 4.0~5.6 | Nuclear power equipment, heavy machinery |
·Square tube specifications (side length × wall thickness range)
| Side Length（mm） | Wall thickness range（mm） | Application Areas |
|---|---|---|
| 20×20 | 1.0~1.8 | Decorative frames, guardrails |
| 30×30 | 1.0~2.8 | Mechanical guide rails, conveying equipment |
| 40×40 | 1.0~2.8 | Building support, racking structure |
| 50×50 | 1.1~4.6 | Heavy machinery base, industrial platform |
| 80×80 | 1.8~4.6 | Bridge trusses, large equipment frames |
| 100×100 | 1.8~5.6 | High-rise buildings, load-bearing columns |
| 200×200 | 1.8~5.6 | Ship deck, offshore platform structure |
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