How to distinguish 304 and 201 stainless steel?

1) Composition: 304 has better quality and higher price; 201 is domestic with high manganese. 2) Usage: 201 is for railways; 304 is for food, chemical, and nuclear equipment. 3) Appearance: 201 is bright but prone to rust; 304 is matte and rust-resistant. 4) Corrosion Resistance: 304 is superior. 5) Nickel Content: 304 has more nickel than 201.

ASTM A269 Stainless Steel Seamless Bright Annealing Tube 316L

Name: ASTM A269 Stainless Steel Seamless Bright Annealing Tube 316L
Brand: Wenzhou Sinco Steel Co., Ltd.
SKU: 884395345

Zhejiang, ChinaWenzhou Sinco Steel Co., Ltd.

US$2.45

50 kg

Sample price:US$170.00/meter.Request sample

Product profile

Customization

Available

Type

Seamless,Welded

Technique

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

Material

Stainless Steel /Alloy Steel

Surface Treatment

Varnishing/Polished/Antispetical/Oiled

Usage

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

Section Shape

Round

End

PE/Be

Wall Thickness

0.5mm-5mm

Length

5m-12m

Certs

ISO 9001-2008, CE. PED,Ts

Delivery Time

15-50days

Material Grade

304 316 310 321 etc

Transport Package

Nuded Cargo or Nylon Bags or Wooden Box

Specification

6MM~273MM

Trademark

SINCO

Origin

China

HS Code

7304419000

Production Capacity

2000ton/Month

Key features

Wide Material Selection: Available in 304, 316L, 430, 201, 202, duplex, and other stainless steel grades.

Flexible Customization: Customizable wall thickness (0.5-5mm), length (5-12m), and end types (PE/Be).

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

Strict Quality Testing: Comprehensive testing including UT, ET, HT, RT, and mechanical properties checks.

Broad Industry Application: Suitable for petroleum, chemical, nuclear, power, shipbuilding, and aerospace industries.

Comprehensive Certifications: Certified under ISO 9001-2008, CE, PED, TS, ASME, ABS, CCS, LR, DNV, and TUV.

Versatile Pipe Types: Offers seamless and welded pipes with various outer diameters and thicknesses.

One-Stop Service: Provides fittings, flanges, valves, and other pipe fittings alongside pipes.

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: ≤7.14h 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.