En 10305-4 Hydraulic and Pneumatic Pressure Line (HPL) Seamless Steel Tube/Pipe
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Product Highlights
- High Precision Seamless Tube: Cold drawn seamless steel tube designed for hydraulic and pneumatic pressure lines.
- Multiple Steel Grades Available: Includes St35, St45, St52, E235, E255, E355, and ASTM/SAE standards.
- Comprehensive Surface Treatments: Options include Bright, Black Phosphated, and Galvanizing finishes.
- Strict Quality Inspection: Double inspection by professional controllers with vivid test reports provided.
- Wide Application Scope: Suitable for automotive industry, hydraulic systems, and other industrial fields.
- OEM Service Available: Customization services offered for specific manufacturing requirements.
- Multiple Delivery Conditions: Available in Bk, Gbk, Bkw, Bks, or Nbk conditions per standard.
- International Certifications: Certified under ISO 9001 and TS16949 standards.
Product Attributes
- Customization
- Available
- Type
- Seamless
- Technique
- Cold Drawn
- Model NO.
- hpl
- Material
- Carbon Steel
- Surface Treatment
- Bright, Black Phosphated, Galvanizing
- Usage
- Hydraulic/Automobile Pipe
- Section Shape
- Round
- Standard
- DIN 2391, En10305-1, En10305-4, BS 6323, ISO 8535
- Delivery Condition
- Bk, Gbk, Bkw, Bks or Nbk
- Steel Grade
- St35, St37, St37.4, E235, E355, St45, St52.4, etc
- Certificate
- ISO 9001 Ts16949
- Secondary or Not
- Non-Secondary
- Application
- Automotive Industry, Hydraulic System, Other Indus
- Transport Package
- Plywood Box or Budles
- Specification
- OD2mm -60mm
- Trademark
- CW
- Origin
- China
- HS Code
- 7304319000
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Product Description


En 10305-4 Hydraulic and Pneumatic Pressure Line (HPL) Tube
High Precision Seamless Steel Tube for Automotive Industry and Hydraulic Application
| Material Chemical Composition (%) | |||||||||
| Standard | Steel Grade | Material Number | C | Si | Mn | P | S | Cr | Mo |
| DIN 2391 | ST35 | 1.0308 | <= 0.17 | <= 0.35 | >=0.04 | <=0.025 | <=0.025 | - | - |
| ST45 | 1.0408 | <= 0.21 | <= 0.35 | >=0.04 | <=0.025 | <=0.025 | - | - | |
| ST52 | 1.058 | <= 0.22 | <= 0.55 | <=1.60 | <=0.025 | <=0.025 | - | - | |
| BK | BKW | BKS | GBK | ||||||
| Steel Grade | Rm Tensile Strength (Mpa) Min | A Elongation(%) Min | Rm Tensile Strength (Mpa) Min | A Elongation(%) Min | Rm Tensile Strength (Mpa) Min | Rel Yield Strength(Mpa) Min | A Elongation (%) Min | Rm Tensile Strength (Mpa)Min | A Elongation (%)Min |
| ST35 | 480 | 6 | 420 | 10 | 420 | 315 | 14 | 315 | 25 |
| ST45 | 580 | 5 | 520 | 8 | 520 | 375 | 12 | 390 | 21 |
| ST52 | 640 | 4 | 580 | 7 | 580 | 420 | 10 | 490 | 22 |
| Standard | Steel Grade | Material Number | C | Si | Mn | P | S | Cr | Mo |
| EN10305-1 EN10305-4 |
E235 | 1.0308 | <= 0.17 | <= 0.35 | >=0.04 | <=0.025 | <=0.025 | - | - |
| E255 | 1.0408 | <= 0.21 | <= 0.35 | >=0.04 | <=0.025 | <=0.025 | - | - | |
| E355 | 1.058 | <= 0.22 | <= 0.55 | <=1.60 | <=0.025 | <=0.025 | - | - |
| Steel Grade | (+C) | (+LC) | (+SR) | (+A) | (+N) | |||||||
| Rm Tensile Strength (Mpa) Min | A Elongation(%) Min | Rm Tensile Strength (Mpa) Min | A Elongation(%) Min | Rm Tensile Strength (Mpa) Min | Rel Yield Strength(Mpa) Min | A Elongation (%) Min | Rm Tensile Strength (Mpa)Min | A Elongation (%)Min | Rm Tensile Strength (Mpa) | Rel Yield Strength (Mpa) Min | A Elongation (%) Min | |
| E235 | 480 | 6 | 420 | 10 | 420 | 350 | 16 | 315 | 25 | 340-480 | 235 | 25 |
| E255 | 580 | 5 | 520 | 8 | 520 | 375 | 12 | 390 | 21 | 440-570 | 255 | 21 |
| E355 | 640 | 4 | 580 | 7 | 580 | 450 | 10 | 450 | 22 | 490-630 | 355 | 22 |
| Material Chemical Composition (%) | ||||||||||||
| Steel Grade | Material Number | C | Si | Mn | P | S | Cr | Mo | Tensile strength Rm (Mpa) Min | Yield Strength Reh (Mpa) Min | A Elongation(%) Min | |
| ASTM A822-A450 | A822 | - | Max 0.18 | - | 0.27-0.63 | Max 0.048 | Max 0.058 | - | - | 310 | 170 | 35 |
| ASTM A179 | A179 | - | 0.06-0.18 | - | 0.27-0.63 | Max 0.035 | Max 0.035 | - | - | 310 | 170 | 35 |
| SAE J524 | J524 | - | Max 0.18 | - | 0.3-0.6 | Max 0.04 | Max 0.05 | - | - | 325 | 180 | 35 |


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
-
Business Type
- Manufacturer/Factory & Trading Company
- Address
- 73 East Changjiang Road, Deji, Jingang Town, Zhangjiagang City, Suzhou, Jiangsu, China
-
Plant Area
- 100 square meters
-
Number of Employees
- 6
-
Registered Capital
- 3,000,000 RMB
-
Terms of Payment
- LC, T/T
-
International Commercial Terms(Incoterms)
- FOB, CIF, CFR
-
Average Lead Time
-
Peak Season Lead Time: one month
Off Season Lead Time: one month -
Nearest Port
- shanghai
Our Production Capability & Technical Expertise
-
Main Products
- Carbon Seamless Pipe, Steel Forging, Stainless Tube
-
Production Machines
- Cutting Machine, Heat Treating Machine, Stretching Machine, Straightening Machine, Diagnostic Machine, Cutting Machine, Hydraulic Universal Testing Machine
-
OEM Service Available
- Yes
-
Test Reports for Raw Materials
- RoHS, Others
Our Industry Experience & Global Business Record
-
Year of Establishment
- 2010-01-12
- Export Year
- 2013-08-01
-
Main Markets
- North America, South America, Europe, Southeast Asia/ Mideast, Africa, East Asia(Japan/ South Korea)
-
Number of Foreign Trading Staff
- 4
-
Overseas Agent/Branch
- No
FAQ
- What are the available steel grades?
- We offer St35, St45, St52, E235, E255, E355, and standards like ASTM A822, A179, and SAE J524.
- What surface treatments are available?
- Options include Bright, Black Phosphated, and Galvanizing finishes.
- Is OEM service available?
- Yes, OEM service is available for custom requirements.
- What are the delivery conditions?
- Delivery conditions include Bk, Gbk, Bkw, Bks, or Nbk.
- What certifications does the product have?
- The product is certified under ISO 9001 and TS16949.
- What is the lead time for production?
- The average lead time is one month for both peak and off-peak seasons.
- What payment terms are accepted?
- We accept LC and T/T payment terms.
- How is quality controlled?
- All products undergo double inspection by professional controllers with test reports provided.
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