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St37.4 Carbon Steel Phosphate Hydraulic Tubing
US$1.50-7.00
1,000 kg
Product profile
Customization
AvailableType
SeamlessTechnique
Cold DrawnMaterial
Carbon SteelSurface Treatment
Galvanized, Black Phosphated, BaUsage
Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Mining, Special PurposeSection Shape
RoundStandard
DIN2391,1630,2445,En10305-4,ASTM A822-450,SAE J524Delivery Condition
Bk, Gbk, Bkw, Bks or NbkSteel Grade
St37.4 St52.4,E235,E355,A822,1010,Cfs360Certificate
ISO 9001 Ts16949Secondary or Not
Non-SecondaryApplication
Automotive,Hydraulic System and Precision DeviceTransport Package
Bundles or BoxesSpecification
OD2-60mmOrigin
ChinaHS Code
7304319000Production Capacity
1000ton/MonthKey features
High-Quality Material: Made from St37.4 and St52.4 carbon steel with cold drawn seamless technique.
Versatile Surface Treatment: Available in Black Phosphated, Galvanized, and BA finishes for corrosion resistance.
Wide Application Range: Suitable for hydraulic systems, automotive, oil/gas drilling, and boiler pipes.
Strict Quality Control: Double inspected by professional controllers with vivid test reports provided.
Multiple Standards Compliance: Meets DIN 2391, ASTM A822, EN 10305-4, and SAE J524 standards.
Customizable Specifications: Offers custom steel grades, delivery conditions, and standard options.
Reliable Manufacturer: Established in 2010 with ISO 9001 certification and global market presence.
Flexible Payment Terms: Accepts LC and T/T payment methods for secure transactions.
Company profile

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: OEM Service AvailableExport Year: 2013-08-01 CertifiedNearest Port: shanghaiAverage Response Time: ≤6.53h CertifiedTerms of Payment: LC, T/T
AI-Powered supplier vetting
SummaryZhangjiagang Chewit is a China-based limited trading company established in 2010, with stated precision-tube and steel-forging manufacturing activities. The supplier reports ISO9001:2015 certification, more than 10 production lines, approximately 5,000 tons of annual seamless-steel-pipe productivity, broad export-market coverage, and one-month lead times in both peak and off-peak seasons. Its quality claims include 100% dimensional and surface checks, batch chemical and mechanical testing, and non-destructive testing upon request. Evidence is insufficient to assess after-sales service, financial credibility, and customization capability. Innovation evidence is limited to an associated forging operation reporting 11 authorized patents, while customer evidence consists of one listed buyer and one trade transaction.
Supplier typeThe supplier is identified as a China-based limited company and trade company, with stated manufacturing activities in precision steel tubes and forgings. Its product scope includes seamless, welded, carbon, stainless, hydraulic, cold-drawn, and precision tubes, indicating a specialized steel-product supplier with both trading and manufacturing positioning.
CertificationsThe supplier explicitly reports an ISO9001:2015 management-system certificate. It also describes inspection and industry-related qualifications associated with its forging operation, including API 20B, PED, and classification-society credentials, although the scope and holder of each qualification are not separately specified.
R&D capabilityThe supplier describes advanced production and inspection equipment, precision-tube manufacturing, and a forging operation with 11 authorized patents, including three invention patents. These statements provide explicit but limited evidence of process and product-development capability, mainly linked to the forging operation rather than clearly to the entire supplier entity.
Production capacityThe supplier reports more than 10 production lines, annual seamless-steel-pipe productivity of 5,000 tons, heat-treatment furnaces, inspection equipment, and manufacturing of precision tubes and forgings. The descriptions also cite a 10,000-square-meter tube operation and a substantially larger forging facility, although employee and facility figures are inconsistent across slices and should be verified.
Client casesThe supplier states that it serves wind power, oil and gas, transportation, shipbuilding, and gearbox sectors and has entered the global purchasing system of a major company since 2006. The trade data identifies one buyer and one transaction, so sector references are available but the breadth and depth of verifiable customer cases remain limited.
Product Q&A
Q:What are the available surface treatments?
A:
The tubing is available in Black Phosphated, Galvanized, and BA (Bright Annealed) finishes.
Q:What standards does this tubing comply with?
A:
It complies with DIN 2391, DIN 1630, DIN 2445, EN 10305-4, ASTM A822, and SAE J524.
Q:What are the main applications for this hydraulic tubing?
A:
It is used for hydraulic circuits, pneumatic lines, automotive engineering, oil/gas drilling, and boiler pipes.
Q:Is OEM service available?
A:
Yes, OEM service is available, including custom steel grades and delivery conditions.
Q:What is the lead time for production?
A:
The average lead time is one month for both peak and off-season periods.
Send Inquiry
*To:
Zhangjiagang Chewit International Co., Ltd.
Zhangjiagang Chewit International Co., Ltd.*Content:
Supplier replies will be sent to your registered email
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