How to distinguish 304 and 201 stainless steel?

1) Composition: 304 is 18cr-9ni (imported), 201 is 17cr-4.5ni-6mn (domestic). 2) Properties: 304 has better quality, higher nickel content, and superior corrosion resistance. 201 has high manganese, is prone to rust, and is cheaper. 3) Usage: 304 is for food/nuclear equipment; 201 is often for railway vehicles.

What certifications do you have?

We hold ISO 9001-2008, ASME, PED, CE, ABS, CCS, LR, TUV, and DNV certifications.

What are the available material grades?

We offer 201, 202, 304, 316L, 430, Duplex (2205, 2507), and other specific grades like TP304L, TP316LN, etc.

Duplex Stainless Steel Seamless Industrial Pipe for Minery Project etc

Name: Duplex Stainless Steel Seamless Industrial Pipe for Minery Project etc
Brand: Wenzhou Sinco Steel Co., Ltd.
SKU: 849667015

Zhejiang, ChinaWenzhou Sinco Steel Co., Ltd.

US$3.00

1-49 kg

US$2.45

50+ kg

Sample price:US$100.00/piece.Request sample

Product profile

Customization

Available

Type

Seamless,Welded

Technique

Cold Rolled,Cold Drawn,Hot Rolled,ERW,Efw

Model NO.

industrial pipe

Material

Stainless Steel

Surface Treatment

Varnishing/Polished/Antispetical/Oiled

Usage

Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Food/Beverage/Dairy Products, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose

Section Shape

Round

Quality

Good

Company

Manufacturer in Wenzhou

Customize

Available

Techinics

Seamless

Lead Time

15-50 Days

Material Grade

304 316 321 310 2507 2205

Transport Package

Nuded Cargo or Nylon Bags or Wooden Box

Specification

6MM~1200MM

Trademark

SINCO

Origin

China

HS Code

730441900

Production Capacity

2000 Tons Per Month

Key features

Corrosion Resistance: Chromium-rich oxide layer protects against water, chemicals, and environmental factors.

High Pressure Tolerance: Seamless construction withstands extreme temperatures and pressure without leaks.

Wide Material Selection: Available in 201, 304, 316L, Duplex, and other grades for diverse applications.

Versatile Applications: Suitable for oil/gas, chemical, nuclear, aerospace, and food industry pipelines.

Multiple Surface Finishes: Options include pickling, annealing, polished, satin, and mirror finishes.

Flexible Customization: Supports customization from samples, designs, and full customization options.

Strict Quality Control: Certified ISO 9001-2008, CE, PED with UT, RT, and other standard tests.

Fast Delivery: Lead time of 15-50 days with plenty of stock for normal sizes.

Company profile

In-stock CapacityManagement CertificationYears of Export ExperienceFast Delivery

Wenzhou Sinco Steel Co., Ltd.

Zhejiang, China

CertifiedBusiness Type: Trading Company CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 13 Years CertifiedNearest Port: Ningbo Port, Shanghai PortAverage Response Time: ≤7.13h CertifiedTerms of Payment: LC, T/T, D/P, etc.

AI-Powered supplier vetting

SummaryThe supplier is identified as a professional technical supplier serving nuclear, food processing, coal gasification, environmental protection, and aerospace industries. It offers broad customization, including sample-, design-, full-, minor-, and flexible customization, supported by CAD and documented design inputs, outputs, reviews, verification, and validation. However, it does not provide 3D software design, ODM, SDK, private mold, or well-known-brand OEM services, and reported no new products in the past year. Export experience is established, with 13 years of exporting and 71%–90% of sales from exports, but no overseas showroom, agent, branch, or offline trade-show participation. ERP, OA, CRM, SAP, digitalization, and big-data initiatives are reported. Complaint handling and corrective/preventive action lack written procedures or records, while certification, financial credibility, production capacity, and customer cases are insufficiently evidenced.

Supplier typeThe supplier explicitly identifies as a professional technical supplier and describes service orientation toward nuclear, food processing, coal gasification, environmental protection, and aerospace industries. This supports classification as an industry-focused technical supplier rather than a general trading entity.

After-Sales capabilityThe supplier has no overseas showroom, agent, branch, or offline trade-show history, and reports no written procedures or records for complaint handling or corrective and preventive actions. These explicit limitations indicate weakly documented after-sales and service-support capability.

R&D capabilityThe supplier has R&D-related design documentation and CAD capability, but reports no new products in the past year, no ODM, no SDK, no patents, and no private mold designs. The evidence shows basic design capability but also explicit limitations in recent product innovation and proprietary development.

Customization capabilityThe supplier explicitly provides customization from samples, designs, full customization, minor customization, and flexible customization, supported by CAD and documented design review, verification, and validation materials. This is direct evidence of broad customization capability, although the supplier does not offer 3D software design services or private molds.