What payment terms do you accept?

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

What certifications are provided?

We provide ISO 9001 and Ts16949 certificates, along with EN 10204 3.1 test reports for raw materials and finished products.

What are the main applications of these tubes?

Main applications include automotive fuel injection lines, CNG tubes, hydraulic circuits, hydraulic cylinders, shock absorbers, and high-precision machines.

Seamless Pipe Ck45 E355 Rolled Honed Tube

Name: Seamless Pipe Ck45 E355 Rolled Honed Tube
Brand: Zhangjiagang Chewit International Co., Ltd.
SKU: 944313895

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 ck45 e355 rolled honed 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 Seamless Tube: Cold drawn precision carbon and alloy steel seamless tube for automotive and hydraulic applications.

Wide Material Selection: Available in CK45, E355, St35, St45, St52, and many other customized steel grades.

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

Diverse Delivery Conditions: Available in BK, GBK, BKW, BKS, and NBK conditions to meet specific mechanical property requirements.

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

Multi-Industry Application: Suitable for automotive fuel lines, hydraulic systems, shock absorbers, and high-precision machinery.

High Burst Pressure Resistance: CNG tubes withstand burst pressure of 1307 Bar and working pressure around 350 Bar.

OEM Service Available: Customized standard, delivery condition, and steel grade options are 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: ≤6.94h 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 steel grades?

We offer CK45, E355, St35, St37, St37.4, E235, E255, St45, St52.4, and many other customized or modified steel grades on request.

Q:What surface treatments are provided?

We provide Bright, Black Phosphated, and Galvanizing options. Galvanizing includes Silver, Yellow, and Olive Green coated layers with 8-20um thickness.

Q:What are the delivery conditions?

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

Q:Is OEM service available?

Yes, OEM service is available. We can customize standards, delivery conditions, and steel grades according to your specific requirements.

Q:What is the lead time for production?

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