汽车制造用无缝钢管
汽车制造用高精度无缝钢管是专为汽车行业设计的高性能无缝钢管，具有高精度、高光洁度、高伸长率等特点，可满足汽车零部件制造商的严格要求。
Product Info
High Precision Seamless Steel Tube for Automotive Manufacturing
High precision seamless steel tubes for automotive manufacturing are high-performance seamless steel tubes designed specifically for the automotive industry, with characteristics such as high precision, high smoothness, and high elongation, which can meet the strict requirements of automotive parts manufacturers. The following is a detailed introduction about the product:
Product Characteristics
High Precision Adopting cold drawing technology to ensure high dimensional accuracy and uniform wall thickness of steel tubes, meeting the high-precision requirements of automotive components. | High Smoothness The surface of the steel tube is polished or specially treated to ensure high surface smoothness, reduce friction and wear, and extend its service life. |
High Elongation Rate Made of high-quality carbon steel, alloy steel or stainless steel, the steel tube ensures excellent elongation and toughness, and can withstand complex processing techniques. | Excellent Mechanical Performance Steel tubes have good processing properties such as bending, expansion, flattening, and pier heads, ensuring that they do not burst or crack during the processing. |
Product Size
Tolerances of tubes for precision hydraulic and pneumatic pipelines:
Tolerances of the precision tubes meet the appropriate dimensional standards.
OD tolerance ±0.05mm, ID tolerance ±0.05mm
Tolerances of tubes for precision hydraulic and pneumatic pipelines:
(a) Manufactured length of the tubes is 6000 mm (length tolerances 0 + 50 mm)(b) Exact length is in the range of 3000 – 24000 mm (length tolerances 0 + 10 mm)
Wall thickness: 0.5mm-5mm | Outer diameter: 2.8mm-50mm |
Material Steel Type
EN 10305-1 | E215, E235, E255, E355, E410, 26Mn5, 26Mo2, 25CrMo4, 42CrMo4, 25CrMo4 etc. |
ASTM 519, SAE1-2 | 1008, 1010, 1012, 1015, 1016, 1017, 1018, 1019, 1020, 1021, 1022, 1025, 1026, 1030, 1035 etc. |
JIS G3445 | STKM11A, STKM12A, STKM12B, STKM12C, STKM14B, STKM14C, STKM15A, STKM15C, STKM16A, STKM16C, STKM17A, STKM17C, STKM18A, STKM18B, STKM18C, STKM19A, STKM19C etc. |
DIN 239 | St35, St45, St52. |
Execution Standards
CHINESE STANDARDS | GB/T3639 |
EUROPEAN STANDARDS | EN 10305-1, DIN 2391, BS 6323/4, NF A 49-310, NF A 49-312, UNI 7945, PN-H 74240, PN-H 74220 |
RUSSIAN STANDARDS | GOST 8734, 9567, 12132 |
AMERICAN STANDARDS | ASTM A450 a A519 |
JAPANESE STANDARDS | JIS G3445 |
Main Purpose
01/ Vehicle Transmission System Components
- Used for manufacturing transmission system components such as drive shafts and universal joints.
02/ Automotive Suspension System
- Used for manufacturing support rods, shock absorber tubes, etc. for suspension systems.
03/ Fuel Injection System
- Oil tubes and connectors used for manufacturing fuel injection systems.
04/ Engine And Transmission Components
- Used for manufacturing key components such as engine cylinder blocks and gearbox housings.
05/ Body And Chassis Components
- Used for manufacturing structural components such as body frames and chassis brackets.
06/ Vehicle Control System
- Used for manufacturing control components such as brake systems and steering systems.
Product Advantages & Quality Control
Product Advantages
1. High precision: High dimensional accuracy, suitable for high-precision hydraulic components.
2. High strength and high pressure resistance: Suitable for high-pressure hydraulic systems, with stable and reliable performance.
3. Excellent surface quality: High surface smoothness, reduced fluid resistance, and extended service life.
4. Good processing performance: Easy to manufacture complex hydraulic components.
Adopting cold drawn precision seamless technology to ensure high dimensional accuracy, smooth surface, and uniform wall thickness of steel tubes. | After heat treatment and surface treatment, the mechanical properties and corrosion resistance of the steel tube are further improved. |
Delivery Status:
Designation | Symbol | Description |
Cold drawn / hard | +C (BK) | After the last cold forming no heat treatment. |
Cold drawn / soft | +LC (BKW) | After the last heat treatment, follows the cold drawing there is a light finishing pass. |
Cold drawn and stress relieved annealed | +SR (BKS) | After the final cold drawing process, the tubes are stress-relieved and annealed in a controlled atmosphere. |
Annealed | +A (GBK) | After the last cold drawing process, the tubes are annealed in a controlled atmosphere. |
Normalized | +N (NBK) | After the last cold drawing process, the tubes are normalized in a controlled atmosphere. |
Quality Control
Strict Testing Chemical composition analysis: Ensure that the material composition meets the standard requirements. Mechanical performance testing: Including tensile testing, impact testing, etc., to ensure that the steel tube has sufficient strength and toughness. Non destructive testing: Using ultrasonic, eddy current, or radiographic testing techniques to detect internal defects in steel tubes. Hydraulic test: Each steel tube undergoes a hydraulic test to ensure good sealing and pressure bearing capacity in high-pressure environments. | Testing Standards Compliant with domestic and international standards such as GB/T 3639, DIN 2391, ASTM A519, etc. Each batch of products comes with detailed quality inspection reports and certificates of conformity. | Certification Guarantee Through ISO/TS16949:2009 quality system certification, ensure stable and reliable product quality. |
