Precision Engineered Automotive Carbon Steel Hydraulic Systems Steel Pipe
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Product Highlights
- High Precision Dimensions: Cold drawn seamless pipes with precise OD 2-60mm and WT 0.3-10mm tolerances.
- Low Surface Roughness: Superior inner and outer surface finish for enhanced mechanical performance.
- Wide Standard Compliance: Meets DIN, EN, ASTM, SAE, JIS, GB/T, and ISO standards for global use.
- Versatile Material Options: Available in Carbon Steel, Alloy Steel, and Stainless Steel grades.
- Rigorous Quality Inspection: 100% Eddy Current Test, size check, and EN 10204 3.1 certificates provided.
- Broad Application Scope: Ideal for automotive, hydraulic systems, machinery, and aerospace industries.
- Multiple Delivery Conditions: Options include BK, GBK, BKS, NBK to suit specific processing needs.
- Customized Specifications: Steel grades and delivery conditions can be customized per customer requirements.
Product Attributes
- Customization
- Available
- Type
- Seamless
- Technique
- Cold Drawn
- Model NO.
- ST35 45 52
- Material
- Carbon Steel
- Surface Treatment
- Galvanized, Black Phosphated, Ba
- Usage
- Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Mining, Special Purpose
- Section Shape
- Round
- Standard
- DIN2391, 1630, 2445, En10305-4, SAE J524
- Delivery Condition
- Bk, Gbk, Bkw, Bks or Nbk
- Steel Grade
- St37.4 St52.4, E235, E355, A822, 1010, Cfs360
- Certificate
- ISO 9001 Ts16949
- Secondary or Not
- Non-Secondary
- Application
- Automotive, Hydraulic System and Precision Device
- Transport Package
- Bundles or Boxes
- Specification
- OD2-60mm
- Origin
- China
- HS Code
- 7304319000
- Production Capacity
- 1000ton/Month
Product Images of Precision Engineered Automotive Carbon Steel Hydraulic Systems Steel Pipe
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Product Description
Cold Drawn Seamless Steel Pipe
Carbon steel, Alloy Steel,Stainless Steel
2.Advantage:
(1)Precision in size
(2)Good for mechanical performance
(3)Lower roughness for both inner and outer surface
3.Major Application:
(1)Automotive industry
(2)Precision Engineering
(3)Hydraulic and pneumatic pressure lines
(4)Heat exchanger
(5)Mining and construction machinery
(6)Aircraft and Others

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COLD DRAWN SEAMLESS STEEL TUBE
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Standards
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Steel Grades
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Size Range
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DIN
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2391
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ST35/45/52
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OD2 - 60mm × WT0.3 -10mm
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1629
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ST37/44/52
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OD2 - 60mm × WT0.3 -10mm
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1630
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ST37.4/44.4/52.4
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OD2 - 60mm × WT0.3 -10mm
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2445
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ST35/ST52/ST37.4//52.4
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OD2 - 60mm × WT0.3 -10mm
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73000
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ST 35 / 45 / 52/ 37.4 / 44.4 /52.4
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OD3 - 30mm × ID 1 - 12.5 mm
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GB/T
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8162
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10/20/16Mn/35/45/30CrMo/42CrMo/etc
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OD2 - 60mm × WT0.3 -10mm
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8163
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10/20/16Mn/35/45/30CrMo/42CrMo/etc
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OD2 - 60mm × WT0.3 -10mm
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3639
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10/20/16Mn/35/45/30CrMo/42CrMo/etc
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OD2 - 60mm × WT0.3 -10mm
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3093
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10/20/16Mn/35/45/30CrMo/42CrMo/etc
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OD3 - 30mm × ID 1 - 12.5 mm
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EN
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10305-1
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E215/235/255/355
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OD2 - 60mm × WT0.3 -10mm
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10305-4
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E215/235/255/355
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OD2 - 60mm × WT0.3 -10mm
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ASTM
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A822-A450
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A822
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OD2 - 60mm × WT0.3 -10mm
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A179-A450
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A179
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OD2 - 60mm × WT0.3 -10mm
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A519
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1010/1015/1025/1030/1045/4130/4140/etc
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OD2 - 60mm × WT0.3 -10mm
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SAE
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J524
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Low carbon steel
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OD2 - 60mm × WT0.3 -10mm
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J529
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Low carbon steel
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OD3 - 30mm × ID 1 - 12.5 mm
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JIS
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G3445
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STKM11A/12A/12B/12C/13A/13B/13C/S45C/etc
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OD2 - 60mm × WT0.3 -10mm
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G3455
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STS35/38/42/49
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OD3 - 30mm × ID 1 - 12.5 mm
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ISO
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8535
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ST 35 / 45 / 52/ 37.4 / 44.4 /52.4
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OD3 - 30mm × ID 1 - 12.5 mm
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NF
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A49-310
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TU37b/TU52b
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OD2 - 60mm × WT0.3 -10mm
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BS
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3602
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CFS 360
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OD2 - 60mm × WT0.3 -10mm
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6323(-4)
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CFS2/CFS3/CFS4/CFS5
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OD2 - 60mm × WT0.3 -10mm
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ASTM
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A269
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304,304L, 316, 316L
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OD2 - 60mm × WT0.3 -10mm
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EN
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10216-5
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1.4401, 1.4404
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OD2 - 60mm × WT0.3 -10mm
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BK (+C) BKW (+LC) BKS (+SR) GBK (+A) NBK (+N)
Major Inspection Items: Tensile stength, Yield stength, Elongation, Flattenging, Flaring, Chemical analysis Eddy Current Test
100%, Size and surface checking 100%
Certificates: according to EN 10204 3.1
Applications:
1. For Vehicle (Automotive, locomotive, Construction Machinery like Concrete pump and others)
A. Powertrain system:
• Fuel-rails • Fuel-lines • Common-rail diesel lines • Piston-cooling jets • SCR & EGR
• Rigid pipes • Oil- & water-cooling pipes
B. Fluid handling systems
• Tube assemblies • Air-conditioning tube • Clutch actuator pipes C. Drive and steering system • Ingrain Gear Pipes •
Power-Steering Feed-Pipes
D. Hydraulic system
• Hydraulic and Pneumatic Pressure Lines • Hydraulic fittings • Hydraulic tubing
E. Others For example
• Front axles • Sun-shading board wire tube and other wire tubes • Headrest chair Tube
2. Mechanical and engineering usage
• Mechanic Processing and parts • Metal processing •Heat Exchange • Gas Cylinders
•Sub-sea and Marine • Aerospace • Winder Power Equipment •Energy and Power Generation •Bearings • etc
Other usage for details as per customers requirements

| hydraulic tubing | bundy tube | automotive tube |
| steel forging | pipe as per application | pipe assembly |
| precision pipe | special shape pipe | stainless pipe |
1. who are we? We are based in Jiangsu, China, start from 2010,sell to Eastern Asia(20.00%),Mid East(20.00%),Eastern Europe(15.00%),Southeast Asia(15.00%),Northern Europe(10.00%),Domestic Market(10.00%),South America(5.00%),Western Europe(5.00%),South Asia(0.00%),North America(0.00%),Oceania(0.00%),Southern Europe(0.00%),Central America(0.00%),Africa(0.00%). There are total about 11-50 people in our office.
2. how can we guarantee quality? Always a pre-production sample before mass production; Always final Inspection before shipment;
3.what can you buy from us? Steel Pipe, Seamless Pipe, Hydraulic Oil Tube, Precision Tube, Stainless Steel Tube
4. why should you buy from us not from other suppliers? Production: Advanced production line and drawing with special oil to make the surface in best condition. Lower roughness and good mechanical performance. Inspection before delivery: Professional team for inspection and randomly check
5. what services can we provide? Accepted Delivery Terms: FOB,CFR,CIF,EXW,DDP,DDU; Accepted Payment Currency:USD,EUR,HKD,CNY; Accepted Payment Type: T/T,L/C,MoneyGram; Language Spoken:English,Chinese,Spanish,Japanese
Chewit International
About the Supplier
This supplier has been audited by SGS. Verify the report on the official SGS website with ID "QIP-ASI204814". Items marked "" are certified.
Company Profile
Chewit international has two manufacture. One is for precision stee pipe --- CW tube. Another is manufacture steel forgings.
CW tube, one of the most professional precision tube supplier in China, has a history of more than 20 years.
Our product includes cold drawn precision seamless steel tube, cold drawn welded tube, welded stainless steel tube, tube assambly. Our tubes are used for automotive industry, hydraulic system, Mechanical fields, precision device and others.
Our company covers a toal area of 10000 square meters with the asset of more than 10 million. We have around 120 employees...Due to the advanced production line and full sets of inspection equipments, the tubes produced are promised to be in high quality.
We have ten cold drawn lines, two lines of 20 tons, three lines of 10 tons, five lines of 5 tons to promise the mass output. We use special cold drawing process to make sure the inner and outer surface in low roughness. And the precision drawing mold to garanttee the minimum size tolerance.
We have heat treatment furnace with and without oxygen environment for processing. The bright annealing furnace without oxygen to ensure the tube surface condition best without oxidization and shinning like mirror.
We have a strong and responsible inspection team. All the tubes have to pass eddy current non-destructive test, and ultrosonic non-destructive test as per customer request. We check the tube size and surface 100%. Chemical and mechanical tests are carried out for each batch of tube.
Our forging manufacture covers total area above 100000m2 with with a production capacity of 90000 tons for various kinds of forgings. Also we are eligible for a total of 11 authorized patents, including 3 invention patents.
We are supplier of Wind Power, Oil & gas, Transportation, Ship building, gear box...
We own TPG, API 20B, the European PED, MAN Diesel & Turbo, Classification society: ABS, CCS, BV, DNV, GL, LR, KR, RINA, NK.
Since 2006, we have entered into global purchasing system of the most famous company.
We have established a perfect quality management system and HSE management system. We have API Q1, ISO 9001, ISO 14001: 2004, OHSAS 18001: 2007.
We always adhere to a pragmatic, integrity, unity and innovative as business philosophy.
Scientific management, improving quality, continuous improvement, and pursuit of excellence in quality, to provide customers with first-class forging products and perfect technical services.
About Our Factory & Business Background
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Business Type
- Manufacturer/Factory & Trading Company
- Address
- 73 East Changjiang Road, Deji, Jingang Town, Zhangjiagang City, Suzhou, Jiangsu, China
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Plant Area
- 100 square meters
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Number of Employees
- 6
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Registered Capital
- 3,000,000 RMB
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Terms of Payment
- LC, T/T
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International Commercial Terms(Incoterms)
- FOB, CIF, CFR
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Average Lead Time
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Peak Season Lead Time: one month
Off Season Lead Time: one month -
Nearest Port
- shanghai
Our Production Capability & Technical Expertise
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Main Products
- Carbon Seamless Pipe, Steel Forging, Stainless Tube
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Production Machines
- Cutting Machine, Heat Treating Machine, Stretching Machine, Straightening Machine, Diagnostic Machine, Cutting Machine, Hydraulic Universal Testing Machine
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OEM Service Available
- Yes
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Test Reports for Raw Materials
- RoHS, Others
Our Industry Experience & Global Business Record
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Year of Establishment
- 2010-01-12
- Export Year
- 2013-08-01
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Main Markets
- North America, South America, Europe, Southeast Asia/ Mideast, Africa, East Asia(Japan/ South Korea)
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Number of Foreign Trading Staff
- 4
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Overseas Agent/Branch
- No
FAQ
- What are the main advantages of these cold drawn seamless steel pipes?
- They offer high precision in size, excellent mechanical performance, and lower roughness on both inner and outer surfaces.
- Which international standards do these pipes comply with?
- The pipes comply with major standards including DIN 2391, EN 10305-4, ASTM A822, SAE J524, JIS G3445, and GB/T 8163.
- What materials and steel grades are available?
- Materials include Carbon Steel, Alloy Steel, and Stainless Steel. Grades range from St37.4, St52.4 to 1010, 4140, 304, and 316L.
- What is the size range for OD and Wall Thickness?
- The Outer Diameter (OD) ranges from 2mm to 60mm, and Wall Thickness (WT) ranges from 0.3mm to 10mm.
- What quality inspections are performed before delivery?
- We perform 100% Eddy Current Test, size and surface checking, tensile strength, yield strength, elongation, flattening, and flaring tests.
- What are the accepted payment terms and currencies?
- Accepted payment types are T/T and L/C. Currencies include USD, EUR, HKD, and CNY.
- What are the typical delivery terms?
- We accept FOB, CFR, CIF, EXW, DDP, and DDU delivery terms.
- What is the lead time for production?
- The average lead time is one month for both peak and off-season periods.
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