304/304L (UNS S30400/S30403) is the most widely utilized “18-8” chromium-nickel austenitic stainless steel. It is an economical and versatile corrosion resistant alloy suitable for a wide range of general purpose applications.

It is common practice for 304L to be dual certified as 304 and 304L. The low carbon chemistry of 304L combined with an addition of nitrogen enables 304L to meet the mechanical properties of 304. 304/304L resists atmospheric corrosion, as well as, moderately oxidizing and reducing environments. The alloy has excellent resistance to intergranular corrosion in the as-welded condition. 304/304L has excellent strength and toughness at cryogenic temperatures. 304/304L is non-magnetic in the annealed condition, but can become slightly magnetic as a result of cold working or welding. It can be easily welded and processed by standard shop fabrication practices.
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304/304L has good resistance to atmospheric corrosion, foods and beverages and to many organic and inorganic chemicals in moderately oxidizing to moderately reducing environments. The high chromium content of the alloy provides resistance to oxidizing solutions such as nitric acid up to 55% weight and up to 176°F (80°C). 304/304L also resists moderately aggressive organic acids such as acetic. The nickel present in the alloy provides resistance to moderately reducing solutions such as pure phosphoric acid, whatever the concentration, in cold solutions and up to 10% diluted hot solutions. The alloy can also operate successfully in caustic solutions free of chlorides or Alloy 304/304L does not perform well in more highly reducing environments such as those containing chlorides and sulfuric acid. 304/304L performs well in fresh water service with low levels of chlorides (less than 100ppm). At higher chloride levels the grade is susceptible to crevice corrosion and pitting. For successful performance under these more severe conditions, higher molybdenum content is need such as 316/316L. 304/304L is not recommended for service in marine environments. In most instances, the corrosion resistance of 304, 304L and 304H will be roughly equal in most corrosive environments. However, in environments that are sufficiently corrosive to cause intergranular corrosion of welds and heat-affected zones 304L should be used because of its low carbon content.304L Stainless Steel is used in a wide variety of home and commercial applications, including: ▪ Food processing equipment, particularly in beer brewing, milk processing, and wine making ▪ Kitchen benches, sinks, troughs, equipment, and appliances ▪ Architectural trim and molding ▪ Automotive and aerospace structural use ▪ Construction material in large buildings ▪ Chemical containers, including for transport ▪ Heat exchangers ▪ Nuts, bolts, screws, and other fasteners in the marine environment ▪ Dyeing industry ▪ Woven or welded screens for mining, quarrying & water filtration
C Mn Si P S Cr Ni N
304L 0.03 max 2.0 max 0.75 max 0.045 max 0.03 max 18.0 -20.0 8.0-12.0 0.1 max
304L stainless steel strip sizes and specifications
Grade 304L
Cold rolled stainless steel strip Thickness: 0.3mm- 3.0mm, Width: 5mm - 900mm, Surface: 2B/BA/SB/8K/HL/1D/2D etc
Hot rolled stainless steel strip Thickness: 3.0mm - 16mm, Width: 10mm - 900mm Surface: No.1/pickling
Stainless steel foil Thickness: 0.02mm- 0.2mm, Width: Less than 600mm, Surface: 2B
Standard ASTM A240/A480, ASTM B688, ASTM B463/SB463, ASTM B168/SB168, ASTM B443/SB443/B424/SB424B625/SB625 B575/SB575, JIS G4303,  BS 1449, DN17441, G4305
304L stainless steel coil sizes and specifications
Grade 304L
Cold rolled stainless steel coil Thickness: 0.3mm- 3.0mm, Width: 1000mm - 2000mm, Surface: 2B/BA/SB/8K/HL/1D/2D etc
Hot rolled stainless steel coil Thickness: 3.0mm - 16mm, Width: 1000mm - 2000mm Surface: No.1/pickling
Standard ASTM A240/A480, ASTM B688, ASTM B463/SB463, ASTM B168/SB168, ASTM B443/SB443/B424/SB424B625/SB625 B575/SB575, JIS G4303,   BS 1449, DN17441, G4305
304L stainless steel pipe sizes and specifications
Grade 304L
Stainless steel seamless pipe Outside diameter: 4.0 - 1219mm, Thickness: 0.5 -100mm, Length: 24000mm
Stainless steel welded pipe Outside diameter: 6.0 - 2800mm, Thickness: 0.3 -45mm, Length: 18000mm
Stainless steel capillary pipe Outside diameter: 0.4 - 16.0mm, Thickness: 0.1 -2.0mm, Length: 18000mm
Stainless steel welded sanitary pipe Outside diameter:8.0- 850mm, Thickness: 1.0 -6.0mm
Stainless steel seamless sanitary pipe Outside diameter: 6.0- 219mm, Thickness: 1.0 -6.0mm
Stainless steel square pipe Side Length: 4*4 - 300*300mm, Thickness: 0.25 - 8.0mm, Length: 18000mm
Stainless steel rectangular pipe Side Length: 4*6 - 200*400mm, Thickness: 0.25 - 8.0mm, Length: 18000mm
Stainless steel coil pipe Outside diameter: 0.4 - 16mm, Thickness: 0.1 - 2.11mm
Standard American Standard: ASTM A312, ASME SA269, ASTM A269, ASME SA213, ASTM A213 ASTM A511 ASTM A789, ASTM A790, ASTM A376, ASME SA335, B161, SB163, SB338, SB667/668 Germany Standard: DIN2462.1-1981, DIN17456-85, DIN17458-85· European Standard: EN10216-5, EN10216-2 Japanese Standard: JIS G3463-2006, JISG3459-2012 Russian Standard: GOST 9941-81
304L stainless steel profile sizes and specifications
Grade 304L
Specification EN, DIN, JIS, ASTM, BS, ASME, AISI, ISO
Standard ASTM A276/ASME SA276, ASTM A479/ASME SA479 & ASTM A164/ASME SA164 .
Stainless steel round Bar Diameter: 2mm - 600mm
Stainless steel bright Bar Diameter: 2mm - 600mm
Stainless steel hex Bar Dimension: 6mm - 80mm
Stainless steel square bar Dimension: 3.0 - 180mm
Stainless steel flat bar Thickness: 0.5mm - 200mm, Width: 1.5mm - 250 mm
Stainless steel angle bar as requirements
Length Normally 6m, or produce as requirements
Surface Black, Bright. Peeled and Polished, Solution annealed.
Delivery condition cold drawn, hot rolled, forged, grinding, centerless grinding
Tolerance H8, H9, H10, H11, H12, H13,K9, K10, K11, K12 or as per clients’ requirements
304L stainless steel plate sizes and specifications
Grade 304L
Cold rolled stainless steel plate Thickness: 0.3mm- 16.0mm, Width: 1000mm - 2000mm, Length: as requirements, Surface: 2B/BA/SB/8K/HL/1D/2D etc
Hot rolled stainless steel sheet Thickness: 3.0mm - 300mm, Width: 1000mm - 3000mm Length: as requirements, Surface: No.1/pickling
Standard ASTM A240/A480, ASTM B688, ASTM B463/SB463, ASTM B168/SB168, ASTM B443/SB443/B424/SB424B625/SB625 B575/SB575, JIS G4303, BS 1449, DN17441, G4305
Stainless steel plate Thickness: 8.0mm - 300mm, Width: 1000mm - 3000mm Length: as requirements, Surface: No.1/pickling
Tensile Strength ksi (min) Yield Strength 0.2% ksi (min) Elongation % Hardness        (Brinell) MAX
304L 70 25 40 201

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