DIN 17175 St 35.8 heat exchange tube is a type of seamless steel tube specifically designed for heat exchange applications, complying with the German standard DIN 17175.
Material Properties:
The St 35.8 grade offers good thermal conductivity, mechanical strength, and resistance to high temperatures and pressures. This makes it ideal for applications where efficient heat transfer and durability are crucial.
Applications:
These tubes are primarily used in heat exchangers, condensers, boilers, and other thermal equipment where heat needs to be transferred between fluids. They are common in industries such as power generation, petrochemicals, and chemical processing.
DIN 17175 ST 35.8 Seamless steel boiler tubes Chemical Composition
| Standard | Grade | Chemical Composition Limits (%) | |||||
| C | Si | Mn | P,S | Cr | Mo | ||
| DIN 17175 | DIN 17175 St35.8 | ≤ 0.17 | 0.10-0.35 | 0.40-0.80 | ≤ 0.030 | / | / |
DIN 17175 St35.8 Tubes Standard Mechanical Properties
| Standard | Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
| DIN 17175 | DIN 17175 St35.8 | 360-480 | ≥ 235 | ≥ 25 |
Test and inspection
Chemical Composition Inspection
Mechanical Properties Test(Tensile Strength,Yield Strength, Elongation, Flaring, Flattening, Bending, Hardness, Impact Test)
Surface and Dimension Test
No-destructive Test
Hydrostatic Test.

Packaging and shipping


