Product Description
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SEAMLESS STEEL TUBES FOR SHIP-BUILDING
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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
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| 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% |
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| 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 |
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| 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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