This prevents carbide precipitation at the grain boundaries and protects the metal from corrosion. But, there are differences in certain media. Because of these 316-grade stainless steel is widely used for marine and chemical processing applications. 304 has a . 304 316 . 1. This means that at room temperature, a basket made of grade 301 stainless steel can take up to 33% more stress than a similar basket made from grade 304 alloy. Mechanical Properties 304 vs 316 stainless steel. ASTM A511 304 304L 309S 310S 316 316L 317 321 347 Stainless Steel Hollow Bar | Stainless Steel Hollow Tube; ASTM A312 TP304 TP304L TP304H TP316 TP316L TP317L TP321 TP316Ti TP347 TP347H TP310S TP309S Stainless Steel Pipe; Therefore, stainless steel metal generally has a Chromium content of minimum 10.5%. 316L vs 316 The former grade usually has a higher chromium content while the latter generally contains more nickel. The addition of molybdenum provides pitting resistance in phosphoric acid, acetic acid and dilute chloride solutions and provides corrosion resistance in sulfurous acid. This kind of stainless steel also has good drawability. It is the most common type of stainless steel used in construction and manufacturing. 304 stainless steel is a chromium-nickel austenitic stainless steel with good corrosion resistance. Along with the increased nickel content, 316SS also has an additional element 'Mo' (molybdenum) in its chemical makeup (2%-3%). 304 stainless steel is the most common and widely used form of stainless steel. So its degree of corrosion resistance is higher than the 18-8 series stainless steels. It is also known as "18/8" stainless steel because of its composition, which includes 18% chromium and 8% nickel. Type 304 is the most versatile and widely used stainless steel. Posted on September 27, 2012 by rob bohn The simple answer is 304 contains 18% chromium and 8% nickel while 316 contains 16% chromium, 10% nickel and 2% molybdenum. So you can use metal material analyzer or chemical analysis method to verify the composition of . The chromium provides a corrosion and oxidation resistance, however it can tarnish. The most common form of 304 stainless steel is 18-8, or 18/8, stainless steel, which contains 18 percent chromium and 8 percent nickel. Under high temperature conditions, when the concentration of sulfuric acid is lower than 15% and higher than 85%, 316 stainless . All stainless steels require a minimum of 10.5% chromium and they are alloyed with iron which makes up a large proportion of their final makeup. It can withstand the high temperature of 800 , has good processing performance and high toughness, and is widely used in industry, furniture decoration industry and food and medical industry. When looking at 304 stainless steel vs 316, it is hard to notice the difference between them. These values only apply for thickness less or equal to 1.5 inch 38mm. Still, it doesn't resist chlorides and chemicals as well as marine grade 316 stainless steel does. The melting point of 304 stainless steel is higher than its 316 stainless steel counterpart, ranging between 2,550 - 2,650 F or 1399 - 1454 C. Stainless Steel 304 is basic austenitic steel with "18/8" chromium-nickel. In most common alloys, you'll find 10% nickel and 2 to 3% molybdenum. Stainless steel 304 has outstanding resistance to corrosion in a wide range of environments and when in contact with various corrosive media. The titanium atoms stabilise the structure of the 316 at temperatures over 800C. The difference derives from molybdenum. What distinguishes Type 316 from Type 304 is the addition of molybdenum up to a maximum of 3%. The higher molybdenum content results in grade 316 possessing increased corrosion resistance. The most common form of 304 stainless steel is 18/8 which contains 18% chromium and 8% nickel. It is the most commonly used stainless steel. Stainless Steel Chemical Composition. Another difference is that 304-grade stainless steel has a higher melting point than 316-grade stainless steel. SAE 316 SS Also Known as A4 Stainless or 18/10 for its composition of 18% chromium and 10% nickel. These properties make 316 the preferred choice for a few specific applications requiring extreme resistance to corrosion. Generally, 316 stainless steel is higher in price versus 304 stainless steel. The melting range of 316 is 2,500 F - 2,550 F (1,371 C - 1,399 C), roughly 50 to 100 degrees Fahrenheit lower than the melting point of grade 304 stainless steel. This is another widely-used austenitic stainless steel alloy, and it is famous thanks to its durability, tensile strength, and resistance to oxidation and corrosion. The anti-corrosion properties that set 316 steel apart come from the inclusion of molybdenum in its composition. 1) Composition: 304 contains 17.5%-19.5% chromium and 8%-10.5% nickel while 316 contains 16.5%-18.5% chromium, 10%-13% nickel and 2%-2.5% molybdenum. The difference between 304 and 316 stainless steel is the incorporation of molybdenum of 316 reaches up to 3%. 304 vs 316 Stainless Steel - 7 Differences. SS 316 is better than SS 304 in terms of corrosion resistance, heat resistance and certain properties, but the price is higher than AISI 304, for more details, please check stainless steel grade 304 vs 316, and 316 vs 316L. The summary of results for chemical tests is shared below: Rest percentage is iron which is present on both grades. The key difference between 304 and 304L, as well as, 316 and 316L is the carbon content. . 304 stainless steel is the most ordinary stainless steel. . A2 Stainless Steel. 316 Stainless Steel vs 304 Stainless Steel: Which Should you Choose? All other element ranges are essentially the same (nickel range for . In addition, it contains 2% molybdenum. It is made up of almost the same materials as 304 stainless steel and has almost the same physical and mechanical properties. 304 is austenitic stainless steel. The following table lists the chemical composition of SS304 in various standards. 304 has 18% chromium and 8% nickel, so it is called 18/8 stainless steel, while AISI 316 stainless steel has 16% chromium, 10% nickel and 2% molybdenum. . This composition chart shows that there are some critical differences in components and percentage of chromium and nickel. . Both are non-magnetic, austenitic, and non-hardenable through heat treatment. A major difference between 304 and 316 stainless steel is the chemical composition, with 316 containing a significant amount of molybdenum; typically 2 to 3 percent by weight vs only trace amounts found in 304. The molybdenum in 316 stainless steel makes it more corrosion-resistant than 304 stainless steel, but also more expensive as well. 304 stainless steel contains 18% chromium and 8% nickel, whereas 316 stainless steel contains 16% chromium, 10% nickel, and 2% molybdenum. This alloy is suitable for welding because it has a carbon content lower than 301 to 303 series alloys to avoid carbide precipitation in welding applications. Its nominal composition is 18% chromium and 8% nickel, so it is also called 18/8 stainless steel. Chemical Composition Chart of 304 and 316. How strong is 304? Type 304. Similar to 304, 316 stainless steel is a chromium-nickel stainless. 316 stainless steels consist of 16% chromium and 10% nickel. Chemical Composition 304 Chemical Composition 316 Carbon 0.08 Carbon 0.08 Manganese 2.00 Manganese 2.00 Phosphorus 0.045 Silicon 0.75 Sulfur 0.030 Chromium 16.00 Silicon 0.75 Nickel 10.00 . Stainless steel 316 has a greater resistance to chemical attack and oxidations than 304. 304 contain 8 % nickel, while it's 10% in 316. Addition of molybdenum increases corrosion resistance of 316 stainless steel, especially against pitting and crevice corrosion in chloride environments. Grade: Chemical Properties : Tensile Strength: Yield Strength: Rockwell . It is an austenitic stainless steel.It is less electrically and thermally conductive than carbon steel.It is magnetic, but less magnetic than steel. As stated above, the major difference in both stainless steel grades is in their composition. Read More It is less thermally conductive and electrically than carbon steel and is substantially non-magnetic. The different properties and applications exhibited by both grades come as a result of these differences. : +91-22-61905600 (100 Lines) Email : exports . Chemical storage and manufacturing equipment; Oil and gas extraction equipment . 316 Stainless Steel: This alloy is recommended for welding because it has a carbon content lower than 302 to avoid carbide precipitation in welding applications. The stainless steel originally developed was 304. 18/10 provides excellent resistance from corrosion and stress cracking. Stainless Steel 316/304 vs 316 L /304 L. As American Iron and Steel Institute (AISI) basic grades, the only practical difference between 304 / 316 and 304 L / 316 L is carbon content; the [L] means the lower carbon content.. Name: ASTM: UNS: EN: DIN: SS: BS: C: Cr: Ni: Mo: Other: 301: S30100: 0.1: 1.4310: . The steel consists of both nickel (between 8% and 10.5%) and chromium (between 18% and 20%) metals as the primary non-iron elements. Even though stainless steel 304 has a higher melting point, grade 316 has better resistance to chemicals and chlorides (like . The main difference between 304 vs 316 stainless steel is the composition and corrosion resistance, SS304 doesn't contain molybdenum while SS316 contains 2-3% molybdenum. An extra 2-3% increase in molybdenum can reduce this sensitivity. It also includes carbon, silicon, and manganese. 3) the requirements for chromium (Cr) content are different. Requirements for one grade of stainless over the other are often dependent on the application or environment; therefore, it is important to . The chemical composition of grade 304 stainless steel is 18% chromium and 8% nickel, which shows the difference in chemistry between it and 316 stainless steel. In 304, chromium 18% while in 316 it's 16%. AISI 304L is the low carbon version of 304 stainless steel, AISI 303 is a free-machining steel, basically a variant of SS304, which increases the phosphorus (P) and sulfur (S) content and improves the machinability. It is essentially non-magnetic when annealed and may become slightly magnetic when cold-worked. The chemical composition of stainless steel 316 is almost identical to that of the 304 grade. 304 stainless steel is a common material in stainless steel, with a density of 7.93 g/cm 3. The main difference between 304 and 316 stainless steel is 316 SS has the addition of molybdenum. These steels, which have similar mechanical properties, differ in their nickel and chromium ratios. Among the most distinctive features of 316 quality . Stainless steels of the 316 grade include less chromium often around 16% but increase nickel levels and add molybdenum to the mix. The carbon ranges are 0.08% maximum for 304 and 316 and 0.030% maximum for the 304 L and 316 L types. A2 stainless steel is often referred to as 304 or 18/8 Stainless. 3. 2) the requirements for nickel (Ni) content are slightly different. This characteristic makes it a prime choice for the manufacture of precision parts. Though the stainless steel 304 alloy has a higher melting point, grade 316 has a better resistance to chemicals and chlorides (like salt) than grade 304 stainless steel. The carbon content is held to 0.08% maximum, while the nickel content is increased slightly. Titanium content is typically only around 0.5%. What is the Difference Between 304 and 316 Stainless Steel? Get In Touch. Commonly found in marine applications, 316 stainless steel contains 2 to 3% molybdenum, while 304 has none. . Molybdenum is an alloy that drastically enhances corrosion resistance, especially for environments prone to rust. What is 304 stainless steel's chemical composition? It contains roughly 16-25% chromium and up to 36% nickel by composition, as well as small amounts of carbon and manganese. CHEMICAL COMPOSITION ( IN PERCENTAGE ) 1.5 max. . Mechanical Properties Difference 304 stainless steel does not. Notes: For thickness above 38mm, 304 tensile strength and yield strength is same with 316, meanwhile 304L is same with 316L, but hardness is different. Despite their similarities in chemical resistance, 316 stainless-steel is superior to 304, which tends to oxidize and decay easily in harsh conditions. Equipment in the chemical, food, paper, mining, pharmaceutical and . Stainless Steel 304 Sheets Overview. 304 is between 18% and 20%, while 321 is between 17% and 19%. Comparison of two grades of stainless steel 304 vs 316 stainless steel: Composition. The addition makes the metal less likely to rust, especially when it comes in contact with chlorides and other industrial solvents. 316 Stainless Steel has the same chemical composition as 304 coupled with another element, Molybdenum. The addition of molybdenum provides pitting resistance in phosphoric acid, acetic acid and dilute chloride solutions and provides corrosion resistance in sulfurous acid. One notable difference between 304 and 316 stainless steel is their levels of nickel and chromium. It has good corrosion resistance in the production of pulp and paper. The most popular 304 grade stainless contains 18% chromium and 8% nickel though other alloys exist within the same grade. The molybdenum content of 316L stainless steel is slightly higher than that of 316 stainless steel. The main difference between 304 vs 316 stainless steel is that 304 does not contain molybdenum, while 316 contains 2-3% molybdenum and less chromium and more nickel. Type 304 is the most widely used austenitic stainless steel. The addition of molybdenum provides pitting resistance in phosphoric acid, acetic acid and dilute chloride solutions and provides corrosion resistance in sulfurous acid. 304 is between 8% and 11%, while 321 is between 9% and 12%. The grade consists of a minimum of 10% nickel content, whereas 18/8 (304) consists of only 8% of nickel content. In contrast, 316 Stainless steel is characterized by the inclusion of 16% chromium (Cr), 10% nickel (Ni), and 2% molybdenum (Mo). The real distinction in the stainless steel 316 vs 304 SS comparison is the presence of molybdenum (2-3%) alongside the other alloying elements such as carbon, manganese, and silicon. In certain cases, this material is sensitive to pitting corrosion (PittingCorrosion). SAE 304 SS Also known as A2 Stainless or 18/8 for its composition of 18% chromium and 8% nickel. The key difference between stainless steel grades 304 and 316 is the addition of molybdenum, an alloy that drastically enhances corrosion resistance, especially for more saline or chloride-exposed environments. Outwardly, 304 stainless steel and 316 stainless steel look very similar. However, the chemical composition of 316, which is made up of 16% chromium, 10% nickel, and 2% molybdenum, is the main difference between 304 and 316 stainless steel. A2 (304, 18/8) is an austenitic steel and is non-magnetic. The differing chemical makeups of 304 SS and 316 SS influence how each performs in a certain environment. . AISI 316 has slightly higher yield strength at 200 MPa (vs. 190 MPa for 304), while AISI 304 has a slightly higher melting point (1450C vs. 1400C for 316). The molybdenum is added to help resist corrosion to chlorides (like sea water and de-icing salts). This grade features a nickel content of 8%10.5% and a chromium content of 18%20%. Comparing 304 vs. 316 . Stainless 304 vs 316 Properties Stainless 304 vs 316 Price Difference 304 stainless steel is composed of 18% chromium, 8% nickel. This is due to the higher levels of nickel content contained within 316, as well as the presence of molybdenum. This is a prime example of how the price of stainless steel grades can fluctuate based on the ebb and flow of the raw material cost. It might have a circle with the number 6 in it or . 304 vs 316 stainless steel: Cost . Due to the molybdenum in the steel, the overall performance of this steel is better than 310 and 304 stainless steel. Grade 304 Stainless Steel. It has a higher corrosion resistance than regular steel . SAE 304 stainless steel is the most common stainless steel.The steel contains both chromium (between 18% and 20%) and nickel (between 8% and 10.5%) metals as the main non-iron constituents. Chemical Composition. The following table lists the chemical composition of stainless steel alloys, including austenitic SS 304, 304L 316, 316L, 321, 303, 302, 301, 904L, 201, etc., martensitic SS 440A, 440B, 440C, 420 etc., ferritic SS 430, duplex stainless steel 2205, 2507, 329, etc. Grade 304 stainless steel contains up to 35% nickel and is used for applications such as appliances, cookware, tubing, and hardware. Its composition contains at minimum 17% Chromium, 8% nickel, and 0.15% Sulfur/Selenium. AISI 316 is better than 304 in certain properties, corrosion resistance and heat resistance, etc. 912A, 9th Floor, Opera House, Charni Road, Mumbai-400004, India. So it must be hardened through cold working. From the chemical composition, SS 316 has lesser chromium, and more nickel, and unlike SS 304, it has 2% molybdenum. However, when manufacturing with 304 vs 316 stainless steel, the difference can be huge. It is still sometimes referred to by its old name 18/8 which is derived from the nominal composition of type 304 being 18% chromium and 8% nickel. Moreover, 316 stainless steel is also resistant to the corrosion of ocean and aggressive industrial atmosphere. * Thickness of 1.27mm & below will have elongation of 20% min. Its resistance to corrosive acids also makes 304 Stainless Steel ideal for cookware, appliances, sinks and tabletops. Grade 316 contains molybdenum, making it ideal for marine equipment, chemical and pharmaceutical manufacturing equipment, and commercial kitchen equipment. 304 can withstand corrosion from most oxidizing acids. What's the difference between 304 and 316 stainless steel? 2. Chemical composition(), Mechanical properties() . The two most common stainless steel grades are 304 and 316. The main difference between 304 vs 316 stainless steel is the composition and corrosion resistance, SS304 doesn't contain molybdenum while SS316 contains 2-3% molybdenum. Often, the manufacturer will mark the stainless-steel part to indicate its grade. Prasad Chambers, Office No. And 316 stainless steel tubing also has the remarkable feature of being essentially free from thermal expansion and contraction. 316 stainless steel tubes are more resistant to acids and alkalis and high temperatures than 304. Type 304 stainless steel is an . There are a few distinct differences with the quantities of chromium (18 - 20% for 304, 16 - 18% for 316) and nickel (8 - 10.5% for 304, 10 - 14% for 316). - 316 vs 304 stainless steel. STAINLESS STEEL 304 VS 316, . Put the steel in a temperature range of 450 to 850C for periods of several minutes, if the carbon level is below 0.030% then this intercrystalline corrosion does not take place following exposure to these temperatures. It also protects from saltwater and pitting. 316 stainless steel or 316 SS is the second most popular austenitic grade of stainless steel, and it comprises iron, 10-14% nickel, and 16-18% chromium. Type 316 is also austenitic, non-magnetic, and thermally nonhardenable stainless steel like Type 304. 304 stainless steel vs 316 Cost The cost of stainless steel is largely dependent on the alloys that are present in their composition. 316 is stronger and more durable than 304. About 316 Stainless Steel . . Type 304 stainless steel has good forming and welding properties as well as strong corrosion resistance and strength. Stainless steel 304 and stainless steel 304L are also known as 1.4301 and 1.4307 respectively. The difference between stainless steel 304 and 316 is usually due to the areas of use. That durability makes 304 easy to sanitize, and therefore ideal for kitchen and food applications. Refer to chemical composition 316 stainless steel contains element Mo, which . It is also non-magnetic. A few percentages this way or that in chromium and nickel. The following table lists the chemical composition difference between 304 and 316 stainless steel. Stainless Steel 316. The chemical test is done to identify the chemical composition of steel whereas the mechanical tests are done to identify the strength of 304 vs 316 samples. Which is better 18-8 or 304 stainless steel ? AISI 304 stainless steel (UNS S30400) is the most widely used austenitic chromium-nickel stainless steel. When comparing 304 vs 316 stainless steel sheets, it's important to remember that 316 is the better alloy of the two. 304 versus 316 stainless steel: differences in composition 304 SS is considered a "general purpose" stainless steel and is characterized by the inclusion of 18% chromium (Cr) and 8% nickel (Ni) in its' alloy composition. Tel No. 304 Stainless Steel Composition (SS304 Chemical Composition) 304 stainless steel composition contains 18% chromium and 8% nickel, so it is also known as 18-8 steel. 304 and 316 stainless-steel contain similar amounts of chromium, nickel, and molybdenum. Stainless steel grade 316Ti contains a small amount of titanium. The key difference is the addition of molybdenum, an alloy which drastically enhances corrosion resistance, especially for more saline or chloride-exposed environments. The key difference between 304 vs 316 stainless steel that makes them different is the addition of molybdenum, an alloy that drastically enhances corrosion resistance, especially for more saline or chloride-exposed environments. While grade 304 stainless steel only has trace amounts of it, AISI 316 has considerably more. . It is also called 18/8 stainless steel in the industry. 304 stainless steel is generally less expensive than 316 stainless steel and is often used in lower-cost applications. 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