How does Chewit International guarantee product quality?

We ensure quality through a pre-production sample check before mass production, 100% size checking, and double inspection by professional quality controllers before shipment.

What are the main applications for these hydraulic steel pipes?

These pipes are widely used in hydraulic systems, hydraulic cylinders, industry jacks, motorcycle and automobile vibration dampers, steering gears, and other fields requiring high precision and surface cleanliness.

What certifications do your products hold?

Our products are certified under ISO 9001 and Ts16949, ensuring they meet international quality management and automotive industry standards.

Hot-Selling Car Hydraulic Jack Steel Pipe Tube

Name: Hot-Selling Car Hydraulic Jack Steel Pipe Tube
Brand: Zhangjiagang Chewit International Co., Ltd.
SKU: 2021669535

Jiangsu, ChinaZhangjiagang Chewit International Co., Ltd.

US$0.80-2.50

1,000 kg

Product profile

Customization

Available

Type

Seamless

Technique

Cold Drawn

Model NO.

ST35 37 44 45 52 37.4 44.4 52.4

Material

Carbon Steel

Surface Treatment

Galvanized, Black Phosphated, Ba

Usage

Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Machinery Industry, Chemical Industry

Section Shape

Round

Standard

DIN 2391

Delivery Condition

Bk, Bkw, Nbk

Steel Grade

St35, St37.4, St45, St52, St52.4

Secondary or Not

Non-Secondary

Certificate

ISO 9001 Ts16949

Application

Automotive, Hydraulic System and Precision Device

Transport Package

Box or Bundles

Specification

OD2-60mm

Trademark

Origin

China

HS Code

7304319000

Key features

High Precision Tolerance: OD and ID tolerance can be within +/-0.03mm min for high precision requirements.

Wide Material Selection: Available in ST35, ST37.4, ST45, ST52, E235, E355, 10#, 20#, 45#, SKTM13C, 4130, 4140 and others.

Multiple Surface Treatments: Options include Galvanized, Black Phosphated, and Ba for various corrosion resistance needs.

Strict Quality Inspection: 100% size checking and double inspection by professional quality controllers before delivery.

Customizable Standards: Meets GB/T3639, DIN2391, EN10305-1 and other equivalent standards upon request.

Versatile Applications: Suitable for hydraulic systems, cylinders, jacks, motorcycle/automobile dampers, and steering gears.

Flexible Delivery Conditions: Available in BK, BKW, and NBK delivery conditions to suit specific project requirements.

Certified Quality Assurance: Products certified under ISO 9001 and Ts16949 for reliable performance and safety.

Company profile

Zhangjiagang Chewit International Co., Ltd.

Jiangsu, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: OEM Service AvailableExport Year: 2013-08-01 CertifiedNearest Port: shanghaiAverage Response Time: ≤7.35h 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 material grades for these steel pipes?

We offer a wide range of materials including ST35, ST37.4, ST45, ST52, ST52.4, E235, E355, 10#, 20#, 45#, SKTM13C, 4130, and 4140, with other grades available upon request.

Q:What surface treatments are available for the steel pipes?

The steel pipes can be treated with Galvanized, Black Phosphated, or Ba finishes to meet different environmental and usage requirements.

Q:What is the precision tolerance for the OD and ID?

The OD and ID tolerance can be controlled within +/-0.03mm min, ensuring high precision for demanding applications like hydraulic systems and steering gears.

Q:What standards do these seamless steel pipes comply with?

Our pipes comply with GB/T3639, DIN2391, EN10305-1, and other equivalent international standards, with customization options for specific standard requirements.

Q:What delivery conditions are offered for the steel pipes?

We provide pipes in BK (Bright Annealed), BKW (Bright Annealed with Cold Worked), and NBK (Normal Annealed) delivery conditions to suit various mechanical property needs.