<Dl> <Dd> <Ul> <Li> 300 Series . The most widely used austenite steel is the 304, also known as 18 / 8 for its composition of 18% chromium and 8% nickel . 304 may be referred to as A2 stainless (not to be confused with AISI grade A2 air hardening alloy tool steel containing about 5% chromium). The second most common austenite steel is the 316 grade, also referred to as A4 stainless and called marine grade stainless, used primarily for its increased resistance to corrosion . A typical composition of 18% chromium and 10% nickel, commonly known as 18 / 10 stainless, is often used in cutlery and high - quality cookware. 18 / 0 is also available . </Li> </Ul> </Dd> <Dd> Superaustenitic stainless steels, such as Allegheny Ludlum alloy AL - 6XN and 254SMO, exhibit great resistance to chloride pitting and crevice corrosion because of high molybdenum content (> 6%) and nitrogen additions, and the higher nickel content ensures better resistance to stress - corrosion cracking versus the 300 series . The higher alloy content of superaustenitic steels makes them more expensive . Other steels can offer similar performance at lower cost and are preferred in certain applications . For example ASTM A387 is used in pressure vessels but is a low - alloy carbon steel with a chromium content of 0.5% to 9% . Low - carbon versions, for example 316L or 304L, are used to avoid corrosion problems caused by welding . Grade 316LVM is preferred where biocompatibility is required (such as body implants and piercings). The "L" means that the carbon content of the alloy is below 0.03%, which reduces the sensitization effect (precipitation of chromium carbides at grain boundaries) caused by the high temperatures involved in welding . </Dd> </Dl> <Dd> <Ul> <Li> 300 Series . The most widely used austenite steel is the 304, also known as 18 / 8 for its composition of 18% chromium and 8% nickel . 304 may be referred to as A2 stainless (not to be confused with AISI grade A2 air hardening alloy tool steel containing about 5% chromium). The second most common austenite steel is the 316 grade, also referred to as A4 stainless and called marine grade stainless, used primarily for its increased resistance to corrosion . A typical composition of 18% chromium and 10% nickel, commonly known as 18 / 10 stainless, is often used in cutlery and high - quality cookware. 18 / 0 is also available . </Li> </Ul> </Dd> <Ul> <Li> 300 Series . The most widely used austenite steel is the 304, also known as 18 / 8 for its composition of 18% chromium and 8% nickel . 304 may be referred to as A2 stainless (not to be confused with AISI grade A2 air hardening alloy tool steel containing about 5% chromium). The second most common austenite steel is the 316 grade, also referred to as A4 stainless and called marine grade stainless, used primarily for its increased resistance to corrosion . A typical composition of 18% chromium and 10% nickel, commonly known as 18 / 10 stainless, is often used in cutlery and high - quality cookware. 18 / 0 is also available . </Li> </Ul> <Li> 300 Series . The most widely used austenite steel is the 304, also known as 18 / 8 for its composition of 18% chromium and 8% nickel . 304 may be referred to as A2 stainless (not to be confused with AISI grade A2 air hardening alloy tool steel containing about 5% chromium). The second most common austenite steel is the 316 grade, also referred to as A4 stainless and called marine grade stainless, used primarily for its increased resistance to corrosion . A typical composition of 18% chromium and 10% nickel, commonly known as 18 / 10 stainless, is often used in cutlery and high - quality cookware. 18 / 0 is also available . </Li>

Name any two metals which are added to iron and carbon to make stainless steel