What are the main applications for this seamless steel tube?

It is widely used in the automotive industry (fuel injection lines, steering columns, gear shafts) and hydraulic fields (hydraulic circuits, cylinders, suspension systems), as well as for heat exchangers and high-precision machines.

What are the terms of payment and lead time?

Payment terms include LC and T/T. The average lead time is one month for both peak and off-peak seasons.

DIN2391 En10305 Cold Drawn Precision Carbon Steel Tubing

Name: DIN2391 En10305 Cold Drawn Precision Carbon Steel Tubing
Brand: Zhangjiagang Chewit International Co., Ltd.
SKU: 944308185

Jiangsu, ChinaZhangjiagang Chewit International Co., Ltd.

US$1.50-5.00

1,000 kg

Product profile

Customization

Available

Type

Seamless

Technique

Cold Drawn

Model NO.

seamless pipe cold drawn precision

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

Origin

China

HS Code

7304319000

Key features

High Precision Seamless Tube: Cold drawn precision carbon and alloy steel seamless tube for automotive and hydraulic applications.

Wide Standard Compliance: Meets DIN 2391, EN10305, BS 6323, ISO 8535, and other international standards.

Multiple Surface Treatments: Available in Bright, Black Phosphated, Galvanizing (Silver, Yellow, Olive Green) with 8-20um thickness.

Diverse Delivery Conditions: Offered in BK, GBK, BKW, BKS, and NBK conditions to suit specific mechanical property needs.

Extensive Steel Grade Options: Includes St35, St37, St45, St52, E235, E355, and customized modified steel grades on request.

Rigorous Quality Control: Double inspected by professional quality controllers with vivid test reports for all delivered products.

Versatile Application Scope: Suitable for automotive fuel lines, hydraulic cylinders, shock absorbers, and heat exchangers.

Certified Manufacturing: ISO 9001 and TS16949 certified with EN 10204 3.1 certificates provided for all tubes.

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: ≤5.43h 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 surface treatments are available for the steel tubing?

We offer Bright, Black Phosphated, and Galvanizing options. Galvanizing includes Silver, Yellow, and Olive Green coatings with a layer thickness of 8-20um and a salty spray test resistance of 48-150 hours.

Q:Which international standards does this product comply with?

The tubing complies with DIN 2391, EN10305-1, EN10305-4, BS 6323, ISO 8535, GB/T 8162, GB/T 8163, GB/T 3639, ASTM A519, JIS G3445, and other related standards.

Q:What are the available delivery conditions for the tubes?

Precision tubes are delivered in BK (Cold finished/hard), GBK (Annealed), BKS (Stress relieve annealed), BKW (Cold finished/soft), and NBK (Normalized) conditions.

Q:Can customized steel grades be provided?

Yes, many other steel grades and customized modified steel grades are available upon request. Common grades include St35, St45, St52, E235, E355, and various ASTM/JIS equivalents.

Q:What is the warranty or quality assurance process?

All products undergo double inspection by professional quality controllers. We provide vivid test reports for tested items, and only products passing inspection are delivered. Certificates are available according to EN 10204 3.1.