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Product Applications and Standard

Seamless Steel Tubes For Ship-building
Seamless Steel Tubes,CCS,DNV,LR,GL,ABS,BV,RINA,NK,China National Standard Seamless Steel Tubes,CCS,DNV,LR,GL,ABS,BV,RINA,NK,China National Standard
 

Application:
Products is designed and manufactured for boilers, superheaters and pressure systems of ships

Production Standard:
CCS
DNV
LR
GL
ABS
BV
RINA
NK
China National Standard

Steel Grade:
320、360、410、460、490

 
Dimensions and Tolerances
Manufacturing Process OD W.T.
Cold Drawn Tolerance(mm) Tolerance(mm) Wall Thickness(mm) Tolerance(mm)
>30~50 ±0.3 ≤30 ±10%
>50~219 ±0.8%
Mechanical Properties
Standard Steel grade Tensil strength(Mpa) Yield strength(Mpa) Elongation
GB/T5312 320 ≥195 320~410 ≥25
360 ≥215 360~480 ≥24
410 ≥235 410~530 ≥22
460 ≥265 460~580 ≥21
490 ≥285 490~610 ≥21
Chemical Composition
Standard Grade Chemical composition
C Si Mn P S
GB/T5312 320 ≤0.16 ≤0.35 0.40~0.70 ≤0.035 ≤0.035
360 ≤0.17 ≤0.35 0.40~08.0 ≤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
 
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