Mar 22, 2018 two of the more commonly used grades of austenitic stainless steel are grades 304 and 316. Please contact us if you require special steel types other than those shown in the table. First aid measures first aid skin seek medical help for serious cuts or lacerations or if irritation from contact with dusts persists. Type 304 frequently referred to as 188 stainless is the most widely used alloy of the austenitic group. Core 304 4301 is a classic 18% chromium, 8% nickel austenitic stainless steel and an allpurpose product with good corrosion resistance. Heat transfer and fluid flow during laser spot welding of 304. En 1 jindal stainless indias largest stainless steel.
Stainless steel 304 ss 304 is a type of austenitic stainless steels with good weldability, mechanical strength, and corrosion resistance. Material safety data sheet stainless steel 301, 302, 304. Examples of astm 304 stainless steel rust environment. Datasheet for steel grades stainless steel sus304 sus304 standard number. This is an austenitic chromiumnickel alloy which practically means that it has a very high corrosion resistance. Type 304 is the most versatile and widely used stainless steel. The balanced austenitic structure of grade 304 enables it to be severely deep drawn without intermediate annealing. Typical mechanical properties for grade 304 stainless steels are given in table 2. Stainless steel 304 can be applied to various industrial and nonindustrial fields. It has a nominal composition of 18% chromium and 8%. Austenitic stainless steel has a thermal conductivity of one third of carbon steel and is a superior absorber of laser light. Core 304 4301 can be delivered with a variety of surface finishes.
To help you determine which grade is right for your project, this blog will examine the difference between 304 and 316 stainless steel. Yag laser spot welds were produced at sandia national laboratories. Alloys 304l is the most versatile and widely used alloy in the stainless steel family. It is an economical and versatile corrosion resistant alloy suitable for a wide range of general purpose applications. Stainless steels austenitic stainless steels include the 200 and 300 series of which type 304 is the most common.
The primary alloying additions are chromium and nickel. Type 304 stainless steel has good forming and welding properties as well as strong corrosion resistance and strength. Their chemical composition, mechanical properties, weldability and corrosionoxidation resistance provide the best allround performance stainless. Stainless steel 201 alloy is a high performance austenitic stainless steel formulated to have a lower and more stable cost due to the substitution of manganese for a portion of the nickel used in 300 series stainless steels such as type 304. The following inventory reflects chemical elements entering the composition of an average stainless steel produced by the manufacturer. Core 304 4301 is a classic 18% chromium, 8% nickel austenitic stainless steel. Available forms ak steel produces type 304 stainless steel in thicknesses from 0.
Its an allpurpose product with good corrosion resistance and is suitable for a wide variety of applications that require good formability and weldability. Austenitic stainless steel an overview sciencedirect. Such dual certified product may be unacceptable for high. We can produce stainless steel the specifications follows. Chemical compositions of aisi astmasme and uns austenitic stainless steel grades introduction aisi astm asme and uns. Typical uses include architectural mouldings and trim, kitchen equipment, welded components of chemical, textile, paper, pharmaceutical and chemical industry processing equipment. Stainless steel grades listed in the international standard iso 15510. Stainless steel plate, sheet and strip specification first revision 1 scope 1. Stainless steel 304, ss 310s, ss 316 chemical composition. In some instances type 304 can be used in the aswelded condition. Well known stainless steel grade, very close to the 201 grade but with lower mechanical properties. Stainless steel 304 and stainless steel 304l are also known as 1. Ferritic stainless steels are nonhardenable fecr alloys. It is the standard 188 stainless that is commonly found in pans and cooking tools.
Ferritic stainless steels contain approxi mately 12% chromium. These alloys may be considered for a wide variety of applications where one or more of the following properties are important. Core 304 4301 is the basic variant with normal carbon and nickel content. It also contains the use of sus304,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application. Paper open access the study of corrosion behavior and. Stainless steels stainless 304 properties, fabrication. The low carbon chemistry of 304l combined with an addition of nitrogen enables 304l to meet the mechanical properties of 304. Stainless steel grade 304 cs 304 304l technical data. The addition of molybdenum provides pitting resistance in phosphoric acid, acetic acid and dilute chloride solutions and provides corrosion. Types 302, 304, 304l, and 305 stainless steels are variations of the 18 percent chromium 8 percent nickel austenitic alloy, the most familiar and most frequently used alloy in the stainless steel family. Alloy 304304l uns s30400 s30403 is the most widely utilized 188 chromiumnickel austenitic stainless steel.
Jan 11, 2020 type 304 is the most widely used austenitic stainless steel. F304 austenitic stainless steel abbey forged products. This article discusses the properties and applications of stainless steel grade 304 uns s30400. Types 304, 304l and 304h are the most versatile and widely used of all the stainless steels. Austenitic stainless steel, which is usually referred to as the 300 series, is ideally suited to laser welding, table 4. The difference between 304 and 316 stainless steel metal. It is also referred to as 188 stainless steel, a2 stainless steel as per the iso 3506, or 304s15 as per the british standard. If i had a dollar for every time i get asked that question whats the difference between 304 vs. Its chemical composition, mechanical properties, weldability and ncorrosionoxidation resistance provide the best allround performance stainless steel at relatively low cost. It is still sometimes referred to by its old name 188 which is derived from the nominal composition of type 304 being 18% chromium and 8% nickel. Stainless 302, 304, 304l, 305 specialty stainless steel. These items have chemical and mechanical properties complying with both 304 and 304l specifications. It is the most versatile and most widely used stainless steel available, even though a wide range of alternatives are available.
It is still sometimes referred to by its old name 188 which is derived from the nominal composition. Core 304l4307 is a lowcarbon alternative to core 304 4301 that is giving an improved resistance against intergranular corrosion. The lower carbon content in 304l minimizes deleterious or harmful carbide precipitation as a result of welding. A raytheon ss 525 laser was used for laser spot welding with pulse energies between 2. Types 304 and 304l stainless steels useful for many applications. It is a modification of type 304 in which the chromium and nickel contents are lowered to increase the cold workhardening range. In case of complex machining operation, due to the limited machinability of the steel 304, consider to use a free machining grade px, 316 ls or a modified 316 l grade pm when a high corrosion resistance is required. The use of ss 304 is for various types of liquids and solids tanks and. Types 304 and 304l are the most versatile and widely used of all the stainless steels. Learn more here about its applications and properties.
What is it that makes these grades the best allaround performance stainless steels. Both are nonmagnetic, austenitic, and nonhardenable through heat treatment. Both steels are durable and provide excellent resistance to corrosion and rust. Most widely used austenitic stainless steel, a versatile corrosion.
It has excellent forming and welding characteristics. The lower carbon content minimizes chromium carbide precipitation due to welding and its susceptibility to intergranular corrosion. It has good drawability the combination of low yield strength and high elongation permits fabrication into complex shapes. In order to assis t the reader in this selection, euro inox makes the following tables of technical properties available. T304 can be easily welded and is the choice for many deep drawn, spun or formed parts due to its high ductility. Types 302 s30200, 304s30400, 304l s30403, and 305 s30500 stainless steels are variations of the 18 percent chromium 8 percent nickel austenitic. Ironchromiumnickel grades corresponding to both standard aisi 300series alloys and modified versions of these alloys. The properties, applications and fabrication details are provided for 304 stainless steel. Alloy 304l a t300 series stainless steel austenitic, which has a minimum of 18% chromium and 8% nickel. Their chemical composition, mechanical properties, weldability and. The saeansi 304 aisi 304 is the most commonly available and used type of stainless steel.
Jan 08, 2018 the 304 a2 is the most extensively used austenitic stainlesssteel and this is also known as 188 to describe its composition of 18% chromium and 8% nickel. Grade 304 stainless steel is generally regarded as the most common austenitic stainless steel. It is common practice for 304l to be dual certified as 304 and 304l. Zapp stainless steel 301, 302, 304, 304l, 305, 309, 310, 310s, 316, 316l, 321, 347, 350, 430, 177ph, 18sr version date.
Such alloys, which are based on type 304 188 stainless steel, as shown in fig. The 304 stainless steel has good oxidation resistance in intermittent service up to 870 c and in continuous service up to 925 c. Stainless steel grades listed in the international standard. This is the most versatile and widely used of all the stainless steels and is commonly referred to as 188 which is derived from the nominal chemical composition of 18% cr and 8% ni. Here are the physical and chemical properties of the 301, 302, and 304 stainless steel that we regularly stock including the free bend requirements for each alloy. Types 302 s30200, 304s30400, 304l s30403, and 305 s30500 stainless steels are variations of the 18 percent chromium 8 percent nickel austenitic alloy, the most familiar and most frequently used alloy in the stainless steel family. Most astm and asme standards list the steel grades by their uns unified numbering system numbers but also make reference, where appropriate to the more general aisi american iron and steel institute grade designations. Typical uses include architectural moldings and trim, kitchen equipment, as well as chemical. Stainless steel filler metal is 35 times more expensive than carbon steel even small mistakes are expensive class description e308 used for stainless steel types 301, 302, 304l, 321, cf3 and cf8 e309 used for stainless steel types 304, 304l, 309, 309l. Stainless steel grade 304 is the standard 188 18% chrome, 8% nickel austenitic stainless steel. Stainless steel 304 and 304l are also known as stainless steel 1. Austenitic 300 series stainless steel filler metals. Process equipment in mining, chemical, cryogenic, food, dairy, and pharmaceutical industries. Type 304 is the most widely used austenitic stainless steel.
Hardness is measured by hv or hrb only, depending upon the sheet thickness. Core 304 4301 is an austenitic stainless steel, which belongs to the standard crni stainless steel family. Types 302 s30200, 304 s30400, 304l s30403, and 305 s30500 stainless steels are variations of the 18 percent chromium 8 percent nickel austenitic alloy, the most familiar and most frequently used alloy in the stainless steel family. Most widely used austenitic stainless steel, a versatile. It is also known as 188 stainless steel because of its composition, which includes 18% chromium and 8% nickel. They also offer higher creep, stress rupture and tensile strength at elevated temperature. The main difference between 304 vs 316 stainless steel is the composition and corrosion resistance, ss304 doesnt contain molybdenum while ss316 contains 23% molybdenum. Alloy 304304l uns s30400s30403 is the most widely utilized 188 chromiumnickel austenitic stainless steel. Jfe offers a wide range of crbased stainless steel types. The type 316 alloys are more resistant to general corrosion and pittingcrevice corrosion than the conventional chromiumnickel austenitic stainless steels such as type 304. In addition, the chemical composition of alloy 201 provides higher annealed mechanical. Grade 304 stainless steel is the most versatile and the most widely used of all stainless steels. Type 304l stainless steel type 304l stainless steel is an extralow carbon version of the 304 steel alloy.
Design guidelines for the selection and use of stainless steel nidl distributed by nickel development institute. Stainless steel products are made of type 304 stainless steel uns s30400. Chemical composition of stainless steels flat products. The selection of the appropriate stainless steel grade for each applic ation is the result of variou s considerations.
Types 405, 409, 430, 422 and 446 are representative of this group. C hemical composition and mechanical properties 15 16 crbased 1 please consult us if you require these types of steel. Two of the more commonly used grades of austenitic stainless steel are grades 304 and 316. Outwardly, 304 stainless steel and 316 stainless steel look very similar. The austenitic crni standard grades are the most widely used group of stainless steels. The versatility of coiled spring pins often times makes them the ideal fastener to. Oct 23, 2001 grade 304 is a standard 188 stainless.
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