Marine Precision Steel Tubes
Marine precision steel tubes are a sort of precision steel tubes for marine purposes, it has the characteristics of no oxide layer, high precision and high smooth finish.
The precision steel tubes are mainly used to cylinders, oil cylinders, hydraulic systems.The main chemical compositions of the tubes are C, Si, Mn, S, P, Cr. We are capable of supplying various kinds of precision steel tubes, such as EN/DIN high precision BA seamless steel tubes, EN/DIN hydraulic tubes with high precision, high precision galvanized steel tubes, cold rolled and BA high precision seamless tubes.
The tubes meet the standards GB/T 3639, EN 10305, DIN 2391, ASTM A179, JIS G3445... We are able to provide you a full line of specification. The marine precision steel tubes are certified by leading classification societies, and we can provide relevant certificates according to your requirements. Please contact us for more information!
Features of Marine Precision Steel Tubes:
• Materials: 10#, 20#, 35#, 45#, Q345B, ST35/E235, ST37.4, ST45/E255, ST52/E355...
• Specifications: O.D. 4 ~ 200mm
W.T. 0.5 ~ 22mm
Random length 2000 ~ 12000mm, fixed length, or as per customer’s request
• High precision, under high pressure without linkage, excellent mechanical properties
• Delivery conditions: NBK(+N), BK(+C), GBK(+A), BKW(+LC), BKS(+SR)
• Applications: hydraulic systems, engineering machinery
Mechanical Properties of Partial Steel Grades:
|
Steel Grades |
Delivery Conditions |
|||||||||||
|
+Cb |
+LCb |
+SR |
+Ac |
+N |
||||||||
|
Rm MPa |
A % |
Rm MPa |
A % |
Rm MPa |
RaH MPa |
A % |
Rm MPa |
A % |
Rm MPa |
RcHd MPa |
A % |
|
|
≥ |
||||||||||||
|
10 |
430 |
8 |
380 |
10 |
400 |
300 |
16 |
335 |
24 |
320~450 |
215 |
27 |
|
20 |
550 |
5 |
520 |
8 |
520 |
375 |
12 |
390 |
21 |
440~570 |
255 |
21 |
|
35 |
590 |
5 |
550 |
7 |
- |
- |
- |
510 |
17 |
≥460 |
280 |
21 |
|
45 |
645 |
4 |
630 |
6 |
- |
- |
- |
590 |
14 |
≥540 |
340 |
18 |
|
Q345B |
640 |
4 |
580 |
7 |
580 |
450 |
10 |
450 |
22 |
490~630 |
355 |
22 |
|
Note |
a. Rm = tensile strength, RaH = upper yield strength, A = elongation b. In consideration of the impact of cold working, the yield strength extremely approximates tensile strength, so the formula is recommended: For the +C condition: RcH ≥ 0.8 Rm For the +LC condition: RaH ≥ 0.7 Rm c. The recommended formula: RcH ≥ 0.5Rm d. The pipe with outer diameter less than or equal to 30mm, and wall thickness less than or equal to 3mm, its minimum upper yield strength is allowed to reduce 10MPa. |
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