How is the quality of the steel tubes ensured?

All products are double-inspected by professional quality controllers, and detailed test reports for tested items are provided to customers.

What are the main applications for this tubing?

It is widely used in automotive, aerospace, hydraulic tools, oil and gas drilling, and heavy-duty industrial machinery applications.

What payment terms are accepted?

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

ASTM A519 4130 30CrMo4 42CrMo4 Bicycle Pipe Steel Seamless Cold Tube

Name: ASTM A519 4130 30CrMo4 42CrMo4 Bicycle Pipe Steel Seamless Cold Tube
Brand: Zhangjiagang Chewit International Co., Ltd.
SKU: 2121519825

Jiangsu, ChinaZhangjiagang Chewit International Co., Ltd.

US$2.50-7.00

1,000 kg

Product profile

Customization

Available

Type

Seamless

Technique

Cold Drawn

Material

Alloy Steel

Surface Treatment

Slightly Oiled

Usage

Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Food/Beverage/Dairy Products, Machinery Industry, Chemical Industry

Section Shape

Round

Delivery Condition

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

Steel Grade

4130/30CrMo/4140/42CrMo

Certificate

ISO 9001 Ts16949

Secondary or Not

Non-Secondary

Standards

ASTM A519

Application

Automotive,Motorcycle,Motorbike,Auto Parts

Transport Package

Bundles or Boxes

Specification

OD2-60mm

Origin

China

HS Code

7304511001

Key features

High-Strength Alloy Steel: 4130/4140 grades offer superior strength, toughness, and resistance to fracturing and abrasion.

Multiple Delivery Conditions: Available in Cold Drawn, Annealed, Normalized, Quenched, and Tempered states to suit specific needs.

Wide Application Range: Suitable for automotive, aerospace, hydraulic tools, oil & gas, and heavy-duty industrial machinery.

Strict Quality Control: All products undergo double inspection by professional controllers with detailed test reports provided.

International Certifications: Compliant with ASTM A519, ISO 9001, and TS16949 standards for global market acceptance.

Seamless Cold Drawn Process: Manufactured using precision cold drawing techniques for high dimensional accuracy and surface finish.

OEM Service Available: Customization options available for specific steel grades and delivery conditions upon request.

Fast Lead Time: Standard delivery time is one month, available for both peak and off-peak seasons.

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: ≤6.53h 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 steel grades are available for this tube?

We offer 4130/30CrMo and 4140/42CrMo alloy steel grades, which are medium carbon alloy grades known for high tensile strength.

Q:What delivery conditions can be provided?

Available conditions include Cold Drawn/Hard (+C), Cold Drawn/Soft (+LC), Stress Relieved (+SR), Annealed (+A), Normalized (+N), and Quenched and Tempered (QT).

Q:Is OEM service available for this product?

Yes, OEM service is available, allowing for customization of steel grades and delivery conditions to meet specific project requirements.

Q:What is the standard lead time for delivery?

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

Q:What certifications does the product hold?

The product complies with ASTM A519 standards and the manufacturer holds ISO 9001 and TS16949 certifications.