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Introduction

304 stainless steel pipe is a pipe product made of austenitic stainless steel as the matrix. It is mainly used for fluid transportation, structural support, and industrial and civil pipeline systems that require resistance to general corrosion environments.

Specification

Specification		Standard
Grade		ASTM A312 / TP304
Outer Diameter (OD)		6mm ~ 630mm (Seamless); 6mm ~ 2020mm (Welded)
Wall Thickness		0.5mm – 60mm
Length		1m – 12m (custom lengths available)
Surface Finish		Pickled, Annealed, Polished (180–600 grit)
Tensile Strength		≥ 520 MPa
Yield Strength		≥ 205 MPa
Elongation		≥ 40%
Hardness		≤ 187 HB
Element	Content (%)
C	≤ 0.08
Si	≤ 1.00
Mn	≤ 2.00
P	≤ 0.045
S	≤ 0.030
Cr	18.0 – 20.0
Ni	8.0 – 11.0
N	≤ 0.10

Features

Suitable for various pipe diameters

Seamless pipes range from 6–630 mm in outer diameter, while welded pipes can reach 2020 mm, with wall thicknesses from 0.5–60 mm, covering diverse needs from small-diameter conveying to large-diameter structural applications.

Possesses plastic deformation capability

Elongation ≥40%, allowing it to withstand significant deformation without cracking during bending, flaring, and forming processes.

Meets conventional pressure requirements

Yield strength ≥205 MPa, tensile strength ≥520 MPa, suitable for medium-to-low pressure fluid conveying and general structural load-bearing applications.

Applications

Building and Water Supply Industry

Used for indoor and outdoor water supply, drainage, and HVAC system piping, performing fluid transport functions under normal water quality conditions.

Food and Light Industry

Used in food processing equipment and pipelines, meeting material requirements when in contact with non-strongly corrosive media.

Chemical Basic Equipment Industry

Used for pipelines and equipment connections for transporting low-corrosive media, used under normal or moderate temperature conditions.

Machinery and Structural Manufacturing Industry

Used for supports, railings, and structural pipe fittings, serving as load-bearing or connecting components.

Decorative and Engineering Applications

Used for railings, handrails, and decorative structural components, provided dimensional and surface treatment requirements are met.

Product-Application

Our certificates

FAQ

Q: How to choose between seamless pipe and welded pipe?

A: Seamless pipe is suitable for applications requiring high pressure resistance or structural integrity; welded pipe is suitable for large diameter, low pressure, or structural applications. The choice should be based on the pressure rating and operating conditions.

Q: Is surface treatment required?

A: Acid pickling removes oxide scale, annealing improves processing performance, and polishing (180–600 mesh) is used for appearance or hygiene requirements. The choice should be determined based on the operating environment and subsequent processing.

Q: How to avoid corrosion during use?

A: Prolonged contact with high concentrations of chloride ions or strong acid media should be avoided. Maintaining surface cleanliness and minimizing deposit adhesion reduces conditions for localized corrosion.

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304 Stainless Steel Pipe

Introduction

Specification

Features

Applications

Our certificates

FAQ

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