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ship pipe

Sizes (O.D. x T) from 6 x 1mm to 720 x 60mm 
Standards :GB/T5312-1999,DIN EN 10025

ship pipe

Marine seamless pipe grade 320,360,410,460,490 mechanical properties and chemicalcomposition

Standard:API,ASTM,JIS
CCS, DNV, LR, GL, ABS, BV, RINA, NK, GB/T5312
Application:
Using for marine boiler, superheater and vessel
Grade of Products:
320,360,410,460,490
Dimensional Tolerance:
Type O.D.(D) Thickness(S)    
Cold drawn O.D(mm) Tolerance(mm) Thickness(mm) Tolerance(mm)    
>30~50 ±0.3 ≤30 ±10%    
>50~219 ±0.8%    
Hot rolling >219 ±1.0% >20 ±10%    
Mechanical properties
Standard Grade Tensile
 strength δb (MPa)
Yield strength δ(MPa) Elongation δ%(%)    
GB/T5312 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    
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 0.40~0.80 ≤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

 

 
 
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