Carbon - Manganese Steel Seamless Steel Tubes / Pipes for Ship GB/T 5312
Carbon and Carbon-Manganese Steel Seamless Steel Tubes and Pipes for Ship GB/T 5312
Spec:
Material:320/360/410/460/490
Size Range:OD:4-1200mm
WT:0.3-200mm
General Length:3-12m
Tolerance:
According to the following tables or customers’ request.
| Production Method | Size(mm) | Tolerance | |
|
Hot Rolling(Extrusion) |
OD | ≤159 | ±1.0%(min.±0.50mm) |
| >159 | ±1.25% | ||
|
WT |
≤20 | +15%(min.+0.45mm) -10%(min. -0.30mm) | |
| >20 | ±10% | ||
| D≥351 | ±15% | ||
|
Cold Drawn |
OD | ≤30 | ±0.20mm |
| 30~50 | ±0.30mm | ||
| >50 | ±0.8% | ||
|
WT |
1.5~3 | +12.5% -10% | |
| >3.0 | ±10% | ||
| Steel grade | Chemical composition | |||||||||
| C | Si | Mn | S | P | Residual elements | |||||
| 320 | ≤0.16 | _ | 0.40~0.70 |
≤0.020 |
≤0.025 | Cr | Mo | Ni | Cu | Total |
| 360 | ≤0.17 |
≤0.35 | 0.40~0.80 |
≤0.25 |
≤0.10 |
≤0.30 |
≤0.30 |
≤0.70 | ||
| 410 | ≤0.21 | 0.40~1.20 | ||||||||
| 460 | ≤0.22 | 0.80~1.20 | ||||||||
| 490 | ≤0.23 | 0.80~1.50 | ||||||||
| Steel Grade | Tensile Strength MPa | Yield Strength MPa | Elongation % |
| 320 | 320-440 | ≥195 | ≥25 |
| 360 | 360-480 | ≥215 | ≥24 |
| 410 | 410-530 | ≥235 | ≥22 |
| 460 | 460-580 | ≥265 | ≥21 |
| 490 | 490-610 | ≥285 | ≥21 |
Producing Method: Hot rolling(extrusion), Cold drawn, Cold rolling.
Technical Delivery Conditions:Normalized(NBK)or Normalized and tempered
Widely used in the field of:For ship pressure pipe system, boiler and superheater (Seamless high pressure boiler tube)
Product Images:
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