The carbon content of 304L (UNS 30403) is restricted to a maximum of 0.03%, which prevents sensitization during welding. The carbon content of 304H (UNS S30409) is restricted to 0.04–0.10%, which provides optimal high temperature strength. The difference between 304, 304H and 304L is the carbon content which is >0.03, >0.05 and <0.03 respectively. Carbon content ģ04, 304H and 304L all possess the same nominal chromium and nickel content and thus possess the same corrosion resistance, ease of fabrication and weldability. ģ04 stainless steel was used to clad the Gateway Arch in St. It is also a common coil material for vaporizers.Įarly SpaceX Starships used SAE 301 Stainless Steel in their construction, before moving over to SAE 304L for the SN7 test tank and Starship SN8 in 2020. 304 stainless steel is also used in the architectural field for exterior accents such as water and fire features. 316SS is the preferred alloy for these conditions.ģ04 stainless steel is used for a variety of household and industrial applications such as food handling and processing equipment, screws, machinery parts, utensils, and exhaust manifolds. įor more severe corrosion conditions, when 304 stainless steel is too sensitive to pitting or crevice corrosion by chlorides or general corrosion in acidic applications, it is commonly replaced by 316 stainless steel.ģ04 and 302 Stainless Steels are subject to chloride stress fracture failure when used in tropical salt water conditions such as oil or gas rigs. It is considered resistant to pitting corrosion in water with up to about 400 mg/L chlorides at ambient temperatures, reducing to about 150 mg/L at 60☌.ģ04 stainless steel is also very sensitive at room temperature to the thiosulfate anions released by the oxidation of pyrite (as encountered in acid mine drainage) and can undergo severe pitting corrosion problems when in close contact with pyrite- or sulfide-rich clay materials exposed to oxidation. It is subject to pitting and crevice corrosion in warm chloride environments and to stress corrosion cracking above about 60☌. 06Cr19Ni10 and ISC S30408, the equivalent in Chinese GB/T 20878 and GB/T 17616 nomenclature.Ĭhemical Composition Type 304 Stainless Steel Chemical Composition, %ģ04 stainless steel has excellent resistance to a wide range of atmospheric environments and many corrosive media.SUS304 the Japanese JIS G4303 equivalent grade.18/8 and 18/10 stainless steel (also written 18-8 and 18-10) in the commercial tableware and fastener industries.
304 STAINLESS COMPOSITION ISO
A2 stainless steel outside the US, in accordance with ISO 3506 for fasteners.UNS S30400 in the unified numbering system.It is specified by SAE International as part of its SAE steel grades. Hatfield at Firth Brown in 1924 and was marketed under the trade name "Staybrite 18/8". It has a higher corrosion resistance than regular steel and is widely used because of the ease in which it is formed into various shapes. It is magnetic, but less magnetic than steel. It is less electrically and thermally conductive than carbon steel. The steel contains both chromium (between 18% and 20%) and nickel (between 8% and 10.5%) metals as the main non- iron constituents. SAE 304 stainless steel is the most common stainless steel.
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