GB/T 5312 Q235 Carbon Manganese Steel Seamless Steel Tubes for Ships

Instruction

GB/T 5312 Q235 Carbon Manganese Steel Seamless Steel Tubes For Ships

 

Material
The material used for GB/T 5312 Q235 Carbon Manganese Steel Seamless Steel Tubes for Ships is carbon manganese steel.

 

Specification
The specification for these seamless steel tubes is governed by the Chinese national standard GB/T 5312.

 

Chemical Composition
The chemical composition of GB/T 5312 Q235 Carbon Manganese Steel Seamless Steel Tubes for Ships is as follows:

Element	Composition (%)
Carbon	0.12 - 0.20
Manganese	0.30 - 0.70
Silicon	≤ 0.30
Phosphorus	≤ 0.045
Sulfur	≤ 0.050

 

Mechanical Properties
The mechanical properties of GB/T 5312 Q235 Carbon Manganese Steel Seamless Steel Tubes for Ships are as follows:

Property	Value
Tensile Strength	375 - 500 MPa
Yield Strength	≥ 235 MPa
Elongation	≥ 25%
Impact Toughness	≥ 27 J/cm²
Hardness (HB)	≤ 201 (Annealed state)

 

Steel Grade
The steel grade for GB/T 5312 Q235 Carbon Manganese Steel Seamless Steel Tubes for Ships is Q235.

 

Application
These seamless steel tubes are primarily used in shipbuilding applications. They are specifically designed to withstand the demanding conditions encountered in marine environments, providing excellent strength and corrosion resistance. These tubes are utilized in various shipbuilding components, such as hulls, frames, and other structural elements.