Marine steel pipe, used for shipbuilding and superheater.
Seamless steel pipes for shipbuilding refer to steel pipes designed and manufactured for marine boilers, superheaters and pressure systems. Shipbuilding steel pipes can be widely used in CCS, DNV, LR, GL, ABS, BV, RINA, NK and other ships as well as Chinese national standards.
Production grade
320, 360, 410, 460, 490,GL-R 410,37Mn,34CrMo4,A53B,Grade 3,410HB,410,RST138,RST142,RST238,RST242,RST249,RST338,RST342, etc
Dimensional tolerance
Type of steel pipe |
external diameter(D)
|
Wall thickness of steel pipe(S)
|
||
Cold drawn tube |
Outer diameter of steel pipe(mm)
|
Allowable deviation(mm)
|
Wall thickness of steel pipe(mm)
|
Allowable deviation(mm)
|
>30~50
|
±0.3
|
≤30
|
±10%
|
|
>50~219
|
±0.8%
|
|||
Hot rolled tube |
>219
|
±1.0%
|
>20
|
±10%
|
Mechanical property
standard |
Grade
|
tensile strength(MPa)
|
yield strength(MPa)
|
elongation(%)
|
GB/T5312
|
320
|
320~410
|
≥195
|
≥25
|
360
|
360 | 360~480 | ≥215 | ≥24 |
410
|
410 | 410~530 | ≥235 | ≥22 |
460
|
460 | 460~580 | ≥265 | ≥21 |
490
|
490 | 490~610 | ≥285 | ≥21 |
Chemical make-up
Grade | Steel Grade | C | Si | Mn | S | P | Residual element | |||||
Standard | Cr | Mo | Ni | Cu | Total | |||||||
GB/T 5312 | Carbon & Carbon-Manganese | 320 | ≤0.16 | ≤0.35 | 0.40-0.70 | ≤0.035 | ≤0.035 | ≤0.025 | ≤0.010 | ≤0.030 | ≤0.30 | ≤0.70 |
360 | ≤0.17 | ≤0.35 | 0.40-0.80 | ≤0.035 | ≤0.035 | ≤0.025 | ≤0.010 | ≤0.030 | ≤0.30 | ≤0.70 | ||
410 | ≤0.21 | ≤0.35 | 0.40-1.20 | ≤0.035 | ≤0.035 | ≤0.025 | ≤0.010 | ≤0.030 | ≤0.30 | ≤0.70 | ||
460 | ≤0.22 | ≤0.35 | 0.80-1.40 | ≤0.035 | ≤0.035 | ≤0.025 | ≤0.010 | ≤0.030 | ≤0.30 | ≤0.70 | ||
490 | ≤0.23 | ≤0.35 | 0.80-1.50 | ≤0.035 | ≤0.035 | ≤0.025 | ≤0.010 | ≤0.030 | ≤0.30 | ≤0.70 | ||
China Classification Society (CCS) | 1Cr0.5Mo | 440 | 0.10-0.18 | 0.10-0.35 | 0.40-0.70 | ≤0.035 | ≤0.035 | 0.70-1.10 | 0.45-0.65 | ≤0.030 | ≤0.25 | Sn≤0.03 Al≤0.02 |
2.25Cr1Mo | 410 | 0.08-0.15 | 0.10-0.35 | 0.40-0.70 | ≤0.035 | ≤0.035 | 2.00-2.50 | 0.90-1.20 | ≤0.030 | ≤0.25 | Sn≤0.03 Al≤0.02 |
|
490 | 0.08-0.15 | 0.10-0.35 | 0.40-0.70 | ≤0.035 | ≤0.035 | 2.00-2.50 | 0.90-1.20 | ≤0.030 | ≤0.25 | Sn≤0.03 Al≤0.02 |
Society | Standard or usage | Steel grade | chemical composition, % | |||||||||||
C | Si | Mn | P | S | Cr | Ni | Cu | Al | Mo | V | P+S | |||
GLR | Non alloly | GL-R 410 | ≤ 0.21 |
≤ 0.35 |
≤ 1.40 |
≤ 0.025 |
≤ 0.020 |
- | - | - | ≥0.020 | - | - | - |
GB 18248 | 37Mn | 0.34 ~0.40 |
0.10 ~0.30 |
1.35 ~1.65 |
≤ 0.030 |
≤ 0.030 |
≤ 0.30 |
≤ 0.30 |
≤ 0.20 |
- | - | - | ≤ 0.055 |
|
EN 10297 | 34CrMo4 | 0.30 ~0.37 |
≤ 0.40 |
0.60 ~0.90 |
≤ 0.035 |
≤ 0.035 |
0.9 ~1.20 |
- | - | - | 0.15 ~0.30 |
- | - | |
DNV | for pressure ASTM A53/A53M | A53B | ≤ 0.30 |
- | ≤ 1.20 |
≤ 0.050 |
≤ 0.045 |
≤ 0.40 |
≤ 0.40 |
≤ 0.40 |
- | ≤ 0.15 |
≤ 0.08 |
- |
ABS | for pressure | Grade 3 | ≤ 0.30 |
- | ≤ 1.20 |
≤ 0.050 |
≤ 0.045 |
≤ 0.40 |
≤ 0.40 |
≤ 0.40 |
- | ≤ 0.15 |
≤ 0.08 |
- |
BV | for pressure | 410HB | ≤ 0.21 |
≤ 0.35 |
0.40 ~1.20 |
≤ 0.040 |
≤ 0.040 |
- | - | - | - | - | - | - |
LR | for pressure | 410 | ≤ 0.21 |
≤ 0.35 |
0.40 ~1.20 |
≤ 0.045 |
≤ 0.045 |
≤ 0.25 |
≤ 0.30 |
≤ 0.30 |
- | ≤ 0.10 |
- | - |
KR | for pressure | RST138 | ≤ 0.25 |
≤ 0.35 |
0.30 ~0.90 |
≤ 0.040 |
≤ 0.040 |
- | - | - | - | - | - | - |
RST142 | ≤ 0.30 |
0.30 ~1.00 |
≤ 0.040 |
≤ 0.040 |
- | - | - | - | - | - | - | |||
RST238 | ≤ 0.25 |
0.10 ~0.35 |
0.30 ~1.10 |
≤ 0.035 |
≤ 0.035 |
- | - | - | - | - | - | - | ||
RST242 | ≤ 0.30 |
0.30 ~1.40 |
- | - | - | - | - | - | - | |||||
RST249 | ≤ 0.33 |
0.30 ~1.50 |
- | - | - | - | - | - | - | |||||
RST338 | ≤ 0.25 |
0.30 ~0.90 |
- | - | - | - | - | - | - | |||||
RST342 | ≤ 0.30 |
0.30 ~1.00 |
- | - | - | - | - | - | - | |||||
NK | for pressure | grade 1 No3/ KSTPG 42 | ≤ 0.30 |
≤ 0.35 |
0.30 ~1.00 |
≤ 0.040 |
≤ 0.040 |
- | - | - | - | - | - | - |
CCS | for pressure | 360 | ≤ 0.17 |
≤ 0.35 |
0.40 ~0.80 |
≤ 0.040 |
≤ 0.040 |
≤ 0.25 |
≤ 0.30 |
≤ 0.30 |
≤ 0.10 |
|||
410 | ≤ 0.21 |
≤ 0.35 |
0.40 ~1.20 |
≤ 0.040 |
≤ 0.040 |
≤ 0.25 |
≤ 0.30 |
≤ 0.30 |
≤ 0.10 |
|||||
460 | ≤ 0.22 |
≤ 0.35 |
0.80 ~1.40 |
≤ 0.040 |
≤ 0.040 |
≤ 0.25 |
≤ 0.30 |
≤ 0.30 |
≤ 0.10 |
|||||
490 | ≤ 0.23 |
≤ 0.35 |
0.80 ~1.50 |
≤ 0.040 |
≤ 0.040 |
≤ 0.25 |
≤ 0.30 |
≤ 0.30 |
≤ 0.10 |
- Residual elements:Cr≤0.25%, Mo≤0.10%, Ni≤0.30%, Cu≤0.30%aggregate≤0.70%
Our company can customize the materials of national standard 20 #, Q345B, Q345C, Q345D, Q345E, American standard ASTM/ASME A106 Gr. B, A53 Gr. B, A333 Gr.6, A500 Gr. A, A500 Gr. B, A500 Gr. C and European standard EN10210/EN10219/EN10216 S235JR, S235J0, S235J2, S355JR, S355J0, S355J2, S355NL, S355K2 as well as external standard steel pipes of British standard, Australian standard and Japanese standard. The product quality is reliable. It is also exported to many countries and regions in North America, South America, Europe, the Middle East, Southeast Asia, Australia and Central Asia. The products are widely used in various steel structure engineering, nuclear power engineering, ocean engineering, construction bridge engineering, engineering machinery and equipment production, metallurgical equipment production and other fields. Other products are: high pressure boiler tubes, oil cracking tubes, high pressure fertilizer professional tubes, pipeline steel, oil casings, hot-dip galvanized steel tubes, cold rolled steel tubes, profiled tubes, galvanized steel coils, aluminized zinc steel coils and various pipeline supporting products.
The company attaches great importance to the quality of products, invests heavily in the introduction of advanced equipment and professionals, and goes all out to meet the needs of customers at home and abroad.
The content can be roughly divided into: chemical composition, yield strength, tensile strength, impact property, etc
At the same time, the company can also carry out on-line flaw detection and annealing and other heat treatment processes according to customer needs.
https://www.ytdrintl.com/
E-mail :sales@ytdrgg.com
Tianjin YuantaiDerun Steel Tube Manufacturing Group Co., Ltd. is a steel pipe factory certified by EN/ASTM/ JIS specializing in the production and export of all kinds of square rectangular pipe, galvanized pipe, ERW welded pipe, spiral pipe, submerged arc welded pipe, straight seam pipe, seamless pipe, color coated steel coil, galvanized steel coil and other steel products.With convenient transportation, it is 190 kilometers away from Beijing Capital International Airport and 80 kilometers away from Tianjin Xingang.
Whatsapp:+8613682051821