Corrosion-resistant screw for seawater "MS (Marine Stainless) -270"
MS (Marine Stainless) -270
Achieving excellent corrosion and acid resistance in seawater! Screws that suppress localized corrosion!
Seawater utilization devices, marine structures, and food machinery have all been subjected to salt damage, as well as environments with chlorine, such as hot water pools and septic tanks, where various stainless steels have been employed. However, conventional stainless steels are prone to localized corrosion in solutions containing chloride ions, such as seawater, and in chlorine environments, which limits their use and necessitates frequent maintenance. MS-270 is an austenitic stainless steel that exhibits superior resistance to chloride corrosion and stress corrosion cracking compared to SUS316 and duplex stainless steels. By adding molybdenum, nitrogen, and copper to high chromium and high nickel, MS-270 is a special stainless steel that significantly enhances corrosion resistance. In addition to its resistance to chloride corrosion, it also excels in acid resistance. MS-270 enables the realization of maintenance-free applications. ● For other functions and details, please refer to the catalog.
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basic information
【Features】 ● Excellent seawater resistance ● Exhibits excellent corrosion resistance to seawater ● Tensile strength and yield strength at room temperature are equivalent to SUS304 and SUS316 ● Good acid resistance ● Good corrosion resistance to sulfuric acid, hydrochloric acid, and organic acids ● Stress corrosion cracking resistance ● Exhibits stress corrosion cracking resistance to chlorides ● For other functions and details, please refer to the catalog.
Price information
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Applications/Examples of results
【Applications】 ○ Underwater (fishing reefs, marine-related) ○ Anti-corrosion industry (coastal corrosion prevention) ○ Table salt (food machinery) ○ Pools (pool structures, hot water pool facilities) ○ Water storage and purification (water purifiers, pumps, septic tanks, water storage tanks) ○ Tunnel repair work (construction hardware for tunnels) ○ Okinawa and salt damage areas (general structures)
Detailed information
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Head features Marine stainless steel products are marked with an "S" symbol on the head.
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Chemical composition For details, please refer to the table on the website. https://www.maruemu.co.jp/product/marine.html
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Mechanical properties For details, please refer to the table on the website. https://www.maruemu.co.jp/product/marine.html
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Chlorine Gas Test Testing Method [1] Fill a glass container (22 liters) with 4 liters of water and add chlorine reagent*. [2] Insert a partition (with holes), place the sample on top, and seal with a lid. [3] Once a day, perform observations and simultaneously replace the air.
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Pitting Potential (Table) ■ Pitting Potential (JIS G 0577 Solution 3.5% NaCl Ar Deaerated 30℃)
catalog（1）
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Company information
In 1927, our company started as a manufacturing and sales business focused on hardware products such as cotter pins, and in 1957, we began mass production as a pioneer of stainless steel screws. The frontier spirit that lives on at Maruemu Seisakusho has led to the creation of core technologies based on our history and the accumulation of skills, including "product development of new materials, material processing, and fastening technology."
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