What is the lead time for production?

The average lead time is one month for both peak season and off-season.

What payment terms are accepted?

We accept LC (Letter of Credit) and T/T (Telegraphic Transfer) as terms of payment.

Is OEM service available?

Yes, OEM service is available, including customized standards, delivery conditions, and steel grades.

DIN2391 High Precision Cold Drawn Seamless Steel Tube and Pipe

Name: DIN2391 High Precision Cold Drawn Seamless Steel Tube and Pipe
Brand: Zhangjiagang Chewit International Co., Ltd.
SKU: 918517175

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.

precision steel tube

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 Cold Drawn: Seamless steel tubes manufactured via cold drawing for high precision applications.

Multi-Standard Compliance: Meets DIN 2391, EN10305-1, EN10305-4, BS 6323, and ISO 8535 standards.

Versatile Surface Treatment: Available in Bright, Black Phosphated, Galvanizing (Silver/Yellow/Olive) with 8-20um thickness.

Automotive & Hydraulic Use: Ideal for fuel injection, CNG tubes, steering columns, hydraulic cylinders, and suspension systems.

Multiple Delivery Conditions: Options include BK, GBK, BKW, BKS, and NBK to suit specific mechanical property requirements.

Wide Steel Grade Range: Available in St35, St37, St45, St52, E235, E355, and customized modified steel grades.

Strict Quality Inspection: Double inspected by professional controllers with EN 10204 3.1 certificates and vivid test reports.

OEM Service Available: Customized standard, delivery condition, and steel grades available upon request.

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: ≤4.32h 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 main applications for these steel tubes?

They are widely used in automotive fields (fuel injection, CNG tubes, steering columns) and hydraulic fields (circuits, cylinders, suspension systems).

Q:What surface treatments are available?

Options include Bright, Black Phosphated, and Galvanizing (Silver, Yellow, Olive green coated with 8-20um thickness).

Q:What delivery conditions are offered?

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

Q:Which steel standards does the product comply with?

The product complies with DIN 2391, EN10305-1, EN10305-4, BS 6323, and ISO 8535 standards.

Q:Can customized steel grades be provided?

Yes, many other steel grades and customized modified steel grades are available on request.