Carbon steel and carbon manganese steel seamless pipes for ship building

Sunny Steel offer an extensive range of Carbon steel and carbon manganese steel seamless pipes for ship building environment. The ship building pipes can be used for a wide range of boiler and superheater of the ship I, II level pressure tubes.

Steel pipes with plain end

Steel pipes with plain end

International classification of ships:

  • Standard for malerials and wielding from Chinese classifying society Chinese clasifying society(CCS)
  • Standard of DNV Det Norske Veritas(DNV)
  • Standard of Lloyd’S Register of UK(LR) Lloyd’S Register of UK(LR)
  • Standard of Germanischer Lloyd Germanischer Lloyd(GL)
  • Standard of American Bureau of Shipping(ABS)American Bureau of Shipping(ABS)
  • Standard of BUREAU VERITAS(BV)BUREAU VERITAS(BV)
  • Standard of RINA Italian classification society(RINA)
  • Standard of NIPPON KAIJI KYOKAI(NK)NIPPON KAIJI KYOKAI(NK)
  • Chinese national standard

Application:

  • Seamless steel tubes for manufacturing marine boilers and ovemeaters as we as pressure pipes opf grade I and Ⅱ.

Field of Application:

  • Products is designed and manufactured for boilers, supeiheaters and pressure systems of ships.

Tolerance of Steel Grade: GB/T5312-2009 320, 360, 410, 490

Types Outer diameters Wall thickness
Rube size(mm) tolerances Tube sizes Tolerances
(mm) (mm) (mm)
CDS >30-50 +/- 0.3 <=30 +/- 10%
>50-219 +/- 0.8%
HR >219 +/- 1.0% >20 +/- 10%
Types Outer diameters Wall thickness
Rube size(mm) tolerances Tube sizes Tolerances
(mm) (mm) (mm)
CDS >30-51 +/- 0.4 <=31 +/- 11%
>50-220 +/- 0.9%
HR >220 +/- 1.1% >21 +/- 11%

Note: CDS:Cold-rolled tubes / HR:Hot-rolled tubes
Chemical compisition of GB/T5312-2009:

Steel grade C Si Mn P S
max max min max max max
320 0.16 0.35 0.4 0.7 0.035 0.035
360 0.17 0.35 0.4 0.8 0.035 0.035
410 0.21 0.35 0.4 1.2 0.035 0.035
460 0.22 0.35 0.8 1.4 0.035 0.03
490 0.23 0.35 0.8 1.5 0.035 0.03

Note:residual elements:Cr< =0.25%, Mo<=0.10%, Ni<=0.30%, Cu<=0.30%, aggregate≤0.70%

Mechanical properties of GB/T5312-2009:

Steel grade Tensile strength(MPa) Yield strength(MPa) Elongation
(%)
Flaring&curling proportion I.D./O.D.
min max min min <=0.6 0.6-0.8 >0.8
320 320 410 195 25 12 15 19
360 360 480 215 24 12 15 19
410 410 530 235 22 10 12 17
460 460 580 265 21 8 10 15
490 490 610 285 21 8 10 15

Length: 25 meters maximum, we advice 11.8 meters max.

Surface condition: bright annealed and pickled
Packing: plastic pipe cap, plastic bag and steel strips bundled
Delivery Conditions: Annealed, Normalized, Normalized and Tempered

Inspection and Test:

Chemical Composition Inspection, Mechanical Properties Test(Tensile Strength,Yield Strength, Elongation, Flaring, Flattening, Hardness, Impact Test), Surface and Dimension Test,No-destructive Test, Hydrostatic Test.
Surface treatment:Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting.

PDFView the PDF catalogue of Carbon steel and carbon manganese steel seamless pipes for ship building

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