Below we list some common applications for both grades of steel. The expression 18-8 is a footnote to the chemistry of SS 304 bolt. C = .08 / Mn = 2.00 / P = .04 / S = .03 / Si = 1.00 / Cr = 16.00 – 18.00 / Ni = 10.00 – 14.00 / Mo = 2.00 – 3.00. 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. There have recently become available some stainless steel products in Class 100, also in grade 316 material. 316 has 2-3% Molybdenum and 304 does not. This is particularly apparent for pitting and crevice corrosion in chloride environments. Grade 316 . It is also substantially more expensive. Typical Mechanical Properties required for annealed material covered by ASTM A240. If not, 304 steel will serve your needs just fine. Stainless steel alloys are used predominantly in the automotive, aerospace and construction industries. Both AISI 314 stainless steel and AISI 316 stainless steel are iron alloys. Type 304 stainless steel is an austenitic grade that can be severely deep drawn. Aluminum vs Stainless Steel. What is 316 better for than 304? 304 stainless steel has excellent resistance to a wide range of atmospheric environments and many corrosive media. At this juncture there are three answers posted here, and maybe I'm being a little picky, but they all made my head explode. Stainless steel 304 and stainless steel 304L are also known as 1.4301 and 1.4307 respectively. BASIC DIFFERENCES BETWEEN 304, 316/L & 2205 Before we start ... resistance to act as a stainless steel in most general environments. There are 34 material properties with values for both materials. As noted in an AK Steel data sheet on 304 stainless steel, the alloy reaches its melting point at the 2,550 ° F – 2,650 ° F (1399 ° C – 1454 ° C) range. Contact a Marlin Steel Mechanical Engineer Expert for your next 304 Stainless Steel … This makes stainless 316 more desirable in applications where salt exposure is an issue. 304 316L 2205 Ultimate Tensile MPa 515 515 700 0.2% Proof Strength 205 205 570 Hardness Brinell (max) 200 200 290 Differences to machine and cut? Similarly, Type 316 is durable, easy-to-fabricate, clean, weld and finish. The resultant composition of CS 316 gives the steel much increased corrosion resistance in many aggressive environments. As mentioned above, however, 316 stainless steel is less malleable than 304 stainless steel. Proof stress: 190 Mpa (min.) If a stainless steel fastener with a higher tensile strength is required there are some products available in Class 80, these are usually produced in grade 316 stainless steel. The resultant composition of CS 316 gives the steel much increased corrosion … Properties with values for just one material (2, in this case) are not shown. The carbon content is held to 0.08% maximum, while the nickel content is increased slightly. Click here for more details. Type 304 alloys are all modications of the 18% chromium, 8% nickel austenitic alloy. The molybdenum makes the steel more resistant to pitting and crevice corrosion in … AISI 316 has slightly higher yield strength at 200 MPa (vs. 190 MPa for 304), while AISI 304 has a slightly higher melting point (1450°C vs. 1400°C for 316). C = .08 / Mn = 2.00 / P = .045 / S = .030 / Si = 1.00 / Cr = 18.00 – 20.00 / Ni = 8.00-12.00 / N = .10. Stainless 304 usually consists of 18% chromium and 8% nickel. Grade: Chemical Properties : Tensile Strength: Yield Strength: Rockwell Hardness: Corrosion Resistance: Application Use: 303 17% Chromium, 8% nickel, and 0.15% Sulfur 620 MPa … Both AISI 314 stainless steel and AISI 316 stainless steel are iron alloys. Machining of 2205 is harder than 304 or 316 and you will use more consumables. They have 71% of their average alloy composition in common. Alloy Tensile strength Yield strength Elongation Hardness 316 75 ksi 30 ksi 40 % 95 HRB 316 70 ksi 25 ksi 40 % 95 HRB 1.4404 75 ksi 34.81 ksi 40 % 1.4401 75 ksi 34.81 ksi 40 % Annealed sheet mechanical properties Temperature Yield strength Tensile strength Elongati on, Reduction of area, % … 304 stainless steel is the most versatile and widely used austenitic stainless steel in the world, due to its corrosion resistance. Stainless 316 contains more nickel than stainless 304, while 304 contains more chromium than 316. Its main function in stainless 316 is to help fight off corrosion from chlorides. Grade 316 is an improved version of CS 304, with the addition of molybdenum and a slightly higher nickel content. 17-4 Stainless Steel. Although the properties of stainless steel alloy 316 are at a significantly higher level, the addition of molybdenum in its alloy increases the price as well. Listed in order of their activity they are: This type of corrosion occurs when there is an overall breakdown of the passive film formed on the stainless steel. And unfortunately, commonly available stainless steel such a 304 (A2) and 316 are normally on the weaker side when it comes to tensile strength. There are several factors that come into play when choosing the type of stainless steel to use. 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. Molybdenum increases the corrosion resistance of this chromium-nickel alloy to withstand attack by … Both AISI 304 stainless steel and cold drawn SAE-AISI 1045 are iron alloys. Stainless steel is, therefore, stronger than aluminum. the publication, eg Grade 304 Hot Rolled and Annealed Plate at Room Tempera ture. Its chemical composition, mechanical properties, weldability and ncorrosion/oxidation resistance provide the best all-round performance stainless steel at relatively low cost. Stainless steel, when used for fasteners (nuts, bolts, screws etc) have British standards. Likewise A4 grade can be called type 316. The low free chlorine levels of typical potable water systems will not affect austenitic stainless steels. 316 may have a higher Nickel content but not necessarily. The main difference between 304 and 316 stainless steel is the fact that 316 stainless contains a significantly increased amount of molybdenum. Stainless gets its non corrosive properties from the chromium in the alloy. The only inorganic acid that is friendly to stainless is nitric and it is used to remove any iron particles left on the surface from manufacturing or machining. Cutting speed is about 20% slower on 2205. Tensile Yield Strength Strength Source "A" 565 MPa 241 MPa Source "B" 600 MPa 310 MPa Specification 500 MPa 205 MPa ASTM A240 (min) (min) As may be seen from this example, it is usually the case that the specified values are of a lower (more "conservative") value than the nominal values. 304 stainless steel is commonly used in the manufacture of various items including sinks, pots, pans, tables, and the like. Represented by ASTM-A240 AND ASME SA240. Gangsteel produce ASTM A240 304 Stainless steel plates, S30400, A240 Type 304 Stainless steel cutting parts by water cutting, laser cutting and cnc cutting. Not all steels are made equal. Tensile Strength (Ksi) 84-185: 84-185: Yield Strength (Ksi) 42-140: 42-140: Summary of differences: 1. The content of chromium in the 18-8 alloy is about - 18% with around nickel is 8%. 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