HVG MARINE STEEL 0007

HVG MARINE STEEL 0007: Marine Precision Steel Tubes

Marine precision steel tubes are a sort of precision steel tubes for marine purposes. Due to their features of no oxidation layers, high precision, 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

Technical specification:

Mechanical Properties of Partial Steel Grades

Steel Grades	Delivery Conditionsc
	+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.