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Seamless Steel Pipe for Ship Building

The seamless steel pipe for ship building usage are mainly used for Level 1& Level 2 pressure pipe in piping system, boiler and super-heated unit of shipbuilding.

 

Model N0.of major steel tubes: 320,360,410,460,490,etc.

 

Sizes:

 

Types of steel tubes Out diameter Wall thickness
Cold-rolled tubes Tube sizes (mm) Tolerances (mm) Tube sizes (mm) Tolerances (mm)
>30-50 ±0.3 ≤30 ±10%
>50-219 ±0.8%
Hot-rolled tubes >219 ±1.0% >20 ±10%

 

 

Chemical compisition:

 

Models of steel tubes Chemical compisition (%)
C Si Mn P S
320 ≤0.16 ≤0.35 0.40-0.70 ≤0.035 ≤0.035
360 ≤0.17 ≤0.35 0.40-0.80 ≤0.035 ≤0.035
410 ≤0.21 ≤0.35 0.40-1.20 ≤0.035 ≤0.035
460 ≤0.22 ≤0.35 0.80-1.40 ≤0.035 ≤0.030
490 ≤0.23 ≤0.35 0.80-1.50 ≤0.035 ≤0.030

 

 

Mechanocal properties:

Models of steel tubes Tensile strength (MPa) Yield strength (MPa) Elongation (%)
320 320-410 ≥195 ≥25
360 360-480 ≥215 ≥24
410 410-530 ≥235 ≥22
460 460-580 ≥265 ≥21
490 490-610 ≥285 ≥21

Post time: Feb-10-2023