ASTM A269/ASME SA269 TP304/304L STAINLESS STEEL TUBE BRIGHT ANNEALED

Overview

Type 304 Stainless Steel has excellent welding and deep drawing characteristics - it is easy to fabricate, easy to clean and aesthetically pleasing to the eye.

Type 304L is a lower carbon variant of Grade 304 - the steel can be welded without the resulting issue of carbon precipitation (precipitation of chromium carbide as heat is applied during the welding process which depletes the chromium element of the steel thus reducing its anti-corrosive/oxidation effectiveness). As a result, Type 304L stainless steel is a sort after material for use in severely corrosive conditions. Weld annealing is only necessary in applications where stress loads are excessive.

Grade 304 can also be found in heat exchangers, chemical containers, pipelines and throughout the brewing industry. It can be used as a fabricated material where high temperature petroleum gases or steam production gases are stored such as pressure vessels. It can even be found extensively in the construction industry where the material is used for cosmetic purposes such as building fascias.

304 & 304L plate and pipe have similar properties and in certain cases are stocked with Dual Certification, where it is concluded that each item has properties and a composition which comply with both steel types. Grade 304H cannot be included in this equation due to the steel's higher carbon content which is intended for use in elevated temperature applications. ASTM A269 TP 304 / 304L Stainless Steel Seamless Pipes and Tubes Composition.

Bright annealed tube under a reducing atmosphere or in a vacuum protection, after high temperature solid melting and rapid cooling to get the stainless steel tube, requiring the inner surface has a very good surface roughness and cleanliness, is a comprehensive consideration of organizational stability corrosion resistance and workability of the pipe.

Bright annealed tube inner surface roughness Ra values and their own cleanliness is extremely demanding, so the particles can occur during transport and accumulation of fluid retention has been effectively curbed. In addition, the chemical composition of the pipe and the base material dimensional tolerances need to be strictly controlled to ensure the weldability of steel and the welding quality in the welding fumes, which can reduce the occurrence of particle generation and improving the corrosion resistance of welded parts, and smoothness.

ASTM A269 TP304 Stainless Steel Seamless Tubes range

Chemical Composition of ASTM A269 TP304 Stainless Steel Seamless Tubes

The chemical composition of grade 304 Stainless Steel is outlined in the following table

Mechanical Properties of ASTM A269 TP304 Stainless Steel Seamless Tubes

The Mechanical Properties of grade 304 Stainless Steel are displayed in the following table.

ASTM A269 TP304 Stainless Steel Seamless Tubes Physical Properties

Physical properties of 304 grade stainless steel in the annealed condition

Specification Comparison For Grade ASTM A269 TP304 Stainless Steel Seamless Tubes

Grade specifications for 304 grade stainless steel

ASTM A269 TP304 Stainless Steel Seamless Tubes Applications

The grade 304 steel can be made into plates, sheets, and coils to be used in the following:

• Food processing equipment, particularly in beer brewing, milk processing & wine making.

• Kitchen benches, sinks, troughs, equipment and appliances

• Architectural panelling, railings & trim

• Chemical containers, including for transport

• Heat Exchangers

• Woven or welded screens for mining, quarrying & water filtration

• Threaded fasteners

• Springs

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