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Technical Specifications
| DIN 2391 | ST35/45/52 | OD2-60mm × WT0.3-10mm |
| DIN 1629/1630 | ST37/44/52, ST37.4/44.4/52.4 | OD2-60mm × WT0.3-10mm |
| EN 10305-1/4 | E215/235/255/355 | OD2-60mm × WT0.3-10mm |
| ASTM A519/A179 | 1010/1015/1025/1045, A179 | OD2-60mm × WT0.3-10mm |
| JIS G3445 | STKM11A/12A/13A/S45C | OD2-60mm × WT0.3-10mm |
| ISO 8535 | ST 35/45/52/37.4/52.4 | OD3-30mm × ID 1-12.5mm |
Delivery Conditions: BK (+C), BKW (+LC), BKS (+SR), GBK (+A), NBK (+N)
Inspection Items: Tensile strength, Yield strength, Elongation, Flattening, Flaring, Chemical analysis, 100% Eddy Current Test, 100% Size and surface checking.
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Professional Capability
Our group operates two specialized manufacturing units focused on steel forgings for Marine, Power, Boiler, Petrochemical, and Hydraulic fields, as well as precision steel tubes for the automotive industry and hydraulic systems. With a total area of 150,000 square meters and over 200 dedicated employees, we prioritize quality control. All products undergo double inspection by professional quality controllers, providing customers with detailed test reports. We adhere to the principle of "Customer First, Quality Foremost."
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Frequently Asked Questions
Q1: What materials are used for these seamless steel tubes?
A: The tubes are manufactured using high-quality Carbon and Alloy steel, including grades like St35, St45, St52, E235, and E355.
Q2: Which international standards do your products comply with?
A: Our products meet major international standards such as DIN 2391, EN 10305-1, JIS G3445, and ASTM A519.
Q3: What are the primary applications for these hydraulic tubes?
A: They are widely used in automotive powertrain systems (fuel rails, lines), hydraulic systems, pneumatic pressure lines, and general mechanical engineering.
Q4: What surface treatments are available for the pipes?
A: We offer several treatments including Bright Annealing, Black Phosphating, and Galvanizing to suit different environment requirements.
Q5: What is the size range for these precision tubes?
A: The outer diameter (OD) ranges from 2mm to 60mm, with wall thicknesses (WT) ranging from 0.3mm to 10mm.
Q6: How is the quality of the products ensured?
A: We conduct 100% Eddy Current testing and 100% size and surface checking. Other tests include tensile strength, yield strength, and chemical analysis.
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