Seamless Steel Tube Library: German Standard ST35.8 Seamless Steel Tube Chemical Composition and Mechanical Properties
Hit：62026-06-15 09:12:02
Seamless Steel Tube Library: German Standard ST35.8 Seamless Steel Tube Chemical Composition and Mechanical Properties
ST35.8 seamless steel pipe is a carbon structural steel according to the German DIN standard, corresponding to Chinese 20 # steel. The standard parameters for its chemical composition and mechanical properties are as follows:
1. Chemical composition
ST35.8 belongs to low-carbon carbon steel, and the control range of each component is (mass fraction):
table
Range of Element Content
C (carbon) ≤ 0.17% (partially labeled range is 0.17% -0.24%)
Si (silicon) 0.10% -0.35%
Mn (manganese) 0.40% -0.80%
P (phosphorus) ≤ 0.030% (some suppliers indicate ≤ 0.02%)
S (sulfur) ≤ 0.030% (some suppliers indicate ≤ 0.025%)
Cr/Mo/Ni without additional alloy addition
2. Mechanical properties
At room temperature, the standard mechanical performance parameters are:
table
Performance index parameter requirements
Tensile strength 360-480MPa
Yield strength ≥ 225-235MPa (standard requirement not less than 235MPa)
Elongation rate ≥ 25%
The composition and performance design endow ST35.8 seamless steel pipe with excellent plastic deformation ability and welding performance, while maintaining stable mechanical properties in high temperature environments up to 600 ℃. Therefore, it is particularly suitable for industrial scenarios such as boilers, high temperature and high pressure pipelines, and pressure vessels.
