What are the accepted payment terms?

We accept T/T, L/C, MoneyGram, USD, EUR, HKD, and CNY. Delivery terms include FOB, CFR, CIF, EXW, DDP, and DDU.

What is the lead time for orders?

The average lead time is approximately one month, regardless of peak or off-season periods.

Can you provide OEM services?

Yes, OEM service is available, and we can customize steel grades and delivery conditions according to customer requirements.

Cold Drawn Bright Surface Treatment High Precision ID 4.4mm 5.4mm Carbon Steel Seamless Pipe

Name: Cold Drawn Bright Surface Treatment High Precision ID 4.4mm 5.4mm Carbon Steel Seamless Pipe
Brand: Zhangjiagang Chewit International Co., Ltd.
SKU: 2050925505

Jiangsu, ChinaZhangjiagang Chewit International Co., Ltd.

US$1.00-7.00

1,000 kg

Product profile

Customization

Available

Type

Seamless

Technique

Cold Drawn

Model NO.

CDB1

Material

Carbon Steel

Surface Treatment

Bright Annealing,Black Phosphating,Galvanizing

Usage

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

Section Shape

Round

Standard

DIN 2391

Delivery Condition

Bk (+C) Bkw (+LC) Bks (+Sr) Gbk (+a) Nbk (+N)

Steel Grade

St37/44/52

Secondary or Not

Non-Secondary

Certificate

ISO 9001 Ts16949

Application

Automotive,Hydraulic System and Precision Device

Transport Package

Box or Bundles

Specification

OD2 - 60mm WT0.3 -10mm

Trademark

Origin

China

HS Code

7304319000

Key features

High Precision Dimensions: ID range 1-12.5mm, OD 2-60mm, WT 0.3-10mm with tight tolerances.

Multiple Surface Treatments: Options include Bright Annealing, Black Phosphating, and Galvanizing.

Wide Material Selection: Carbon steel grades St37/44/52, 1010-4140, and stainless 304/316 available.

Comprehensive Quality Control: 100% Eddy Current Test, size/surface check, and EN 10204 3.1 certificates.

Versatile Industrial Applications: Suitable for automotive, hydraulic systems, machinery, and oil/gas drilling.

Advanced Manufacturing Process: Cold drawn seamless technique ensures low roughness and good mechanical performance.

Global Standard Compliance: Meets DIN, ASTM, JIS, EN, and ISO standards for international use.

Reliable Supply Chain: Located in Zhangjiagang with convenient transport links to Shanghai port.

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: ≤4.98h 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?

We offer Bright Annealing, Black Phosphating, and Galvanizing to meet specific corrosion resistance and aesthetic requirements.

Q:What is the size range for these seamless pipes?

The Outer Diameter (OD) ranges from 2mm to 60mm, Wall Thickness (WT) from 0.3mm to 10mm, and Inner Diameter (ID) from 1mm to 12.5mm.

Q:Which steel grades are available?

We provide various carbon steel grades including St35/45/52, 1010-4140, and low carbon steels, as well as stainless steel grades 304, 304L, 316, and 316L.

Q:How do you guarantee product quality?

We conduct 100% Eddy Current Testing and size/surface checks. We also provide EN 10204 3.1 certificates and perform pre-production samples and final inspections.

Q:What are the common applications for these pipes?

They are widely used in automotive powertrains, hydraulic systems, machinery industry, oil/gas drilling, boiler pipes, and pipeline transport.