What certifications does the product have?

Our products comply with ISO 9001 and TS16949 standards, ensuring high quality and reliability for automotive and hydraulic applications.

What is the minimum order quantity (MOQ)?

Please contact our sales team directly for specific MOQ details, as it may vary based on the product specifications and customization requirements.

What is the warranty period for these tubes?

We ensure product quality through double inspection by professional controllers. For specific warranty terms, please refer to our contract or contact our support team.

St37.4+N Galvanized Seamless Steel Tubes for Hydraulic Pneumatic Line

Name: St37.4+N Galvanized Seamless Steel Tubes for Hydraulic Pneumatic Line
Brand: Zhangjiagang Chewit International Co., Ltd.
SKU: 2111359655

Jiangsu, ChinaZhangjiagang Chewit International Co., Ltd.

US$1.50-7.00

1,000 kg

Product profile

Customization

Available

Type

Seamless

Technique

Cold Drawn

Material

Carbon Steel

Surface Treatment

Galvanized, Black Phosphated, Ba

Usage

Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Mining, Special Purpose

Section Shape

Round

Standard

DIN2391,1630,2445,En10305-4,ASTM A822-450,SAE J524

Delivery Condition

Bk, Gbk, Bkw, Bks or Nbk

Steel Grade

St37.4 St52.4,E235,E355,A822,1010,Cfs360

Certificate

ISO 9001 Ts16949

Secondary or Not

Non-Secondary

Application

Automotive,Hydraulic System and Precision Device

Transport Package

Bundles or Boxes

Specification

OD2-60mm

Origin

China

HS Code

7304319000

Production Capacity

1000ton/Month

Key features

Versatile Surface Treatments: Available in Galvanized, Black Phosphated, and Bright Annealed (BA) finishes for diverse corrosion resistance needs.

Wide Material Selection: Offers Carbon Steel grades including St37.4, St52.4, E235, E355, and ASTM A822 to suit specific strength requirements.

Precision Dimensional Range: OD ranges from 0.079 to 60mm and wall thickness from 0.012 to 10mm for high-precision applications.

Strict Quality Control: Double-inspected by professional quality controllers with vivid test reports provided before delivery.

Multi-Industry Application: Suitable for hydraulic systems, automotive engineering, aerospace, medical, and chemical fertilizer industries.

Multiple Standard Compliance: Meets international standards including DIN 2391, EN 10305-4, ASTM A822, and SAE J524.

OEM Service Available: Customized standard, delivery condition, and steel grade options are supported for specific project needs.

Reliable Manufacturer: Established in 2010 with ISO 9001 and TS16949 certifications, ensuring consistent product quality.

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: ≤5.72h 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.