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The difference between 304, 304H, and 304L is the carbon content, which is < 0.08, < 0.1, and < 0.035% respectively (also see UNS designations S30400, S30409, & S30403 respectively). 304 has both the H=High and the L=Low carbon variants.
Type 304L—same as the 304 grade but lower carbon content to increase weldability. Is slightly weaker than 304. Type 304LN—same as 304L, but also nitrogen is added to obtain a much higher yield and tensile strength than 304L. Type 305—same as 304, but with more nickel to decrease work hardening.
SAE 316 stainless steel is a molybdenum-alloyed steel and the second most common austenitic stainless steel (after grade 304). It is the preferred steel for use in marine environments because of its greater resistance to pitting corrosion than most other grades of steel without molybdenum. [ 1 ]
300 series stainless steels are the larger subgroup. The most common austenitic stainless steel and most common of all stainless steel is Type 304, also known as 18/8 or A2. Type 304 is extensively used in such items as cookware, cutlery, and kitchen equipment. Type 316, also known as A4, is the next most common austenitic stainless steel.
Stainless steel's resistance to corrosion results from the 10.5% or more chromium content, which forms a passive film that can protect the material and self-heal in the presence of oxygen. [ 1 ] : 3 It can also be alloyed with other elements such as molybdenum , carbon , nickel and nitrogen to develop a range of different properties depending ...
UNS S17400 is ASTM grade 630, Cr-Ni 17-4PH precipitation hardened stainless steel; UNS S30400 is SAE 304, Cr/Ni 18/10, Euronorm 1.4301 stainless steel; UNS S31600 is SAE 316; UNS S31603 is 316L, a low carbon version of 316. The digits "03" were assigned since the maximum allowed carbon content is 0.03%; UNS C90300 is CDA 903
The special survey cycle (SS) is an alternative for the CSH [clarification needed] and Engine survey (ES) for the CSM. The annual survey (AS) is an inspection of the safety equipment. The annual inspection can be done during a three months period before or the three months after the annual date.
They provide better corrosion resistance, particularly chloride stress corrosion and chloride pitting corrosion, and higher strength than standard austenitic stainless steels such as A2/304 or A4/316. The main differences in composition, when compared with austenitic stainless steel is that duplex steels have a higher chromium content, 20–28% ...