In order to assis t the reader in this selection, euro inox makes the following tables of technical properties available. The lower carbon content minimizes chromium carbide precipitation due to welding and its susceptibility to intergranular corrosion. At elevated temperatures, pitting and crevassing of 430 grade surfaces can occur. Type 321 stainless steel offers higher creep and stress rupture properties than type 304 and, particularly, type 304l which might also be considered for exposures where sensitization and intergranular corrosion are concerns. Read on to understand more about the composition of stainless steel and how its varied qualities can work for you. Austenitic stainless steels have many advantages from a metallurgical point of view. Stainless steel is an alloy of iron fe and chromium cr, with a controlled amount of carbon c. It has excellent forming and welding characteristics.
The stainless steel family a short description of the various grades of stainless steel and how they fit into distinct metallurgical families. Ss304 grade aisi 304 stainless steel properties, composition. Aswelded 430 stainless steel is not suited for robust applications, embrittlement in the heat affected zone is a risk. Stainless steel 304, ss 310s, ss 316 chemical composition. A multipurpose austenitic heat resistant stainless steel. Stainless 316, 316l, 317, 317l specialty stainless steel. Our five categories of stainless steels are differentiated by the alloying elements added to iron, carbon and chromium.
Stainless steel chemical composition and related uns specification table. Offers good corrosion resistance to many environments. It offers medium strength and hardness at the very low temperature even below 450of. Stainless steel filler metal benefits and considerations stainless steel filler metal has a number of advantages over other metals because of its unique chemical composition, but it also comes with some considerations that are important for welders to be aware of. It is still sometimes referred to by its old name 188 which is derived from the nominal composition of type 304. Stainless steel wire rods chemical composition chemical. Stainless steel specification and composition chart. Issf martensitic stainless steels 7 masahito watanabe president yoshida metal industry co. Precipitation hardening steel ferritic stainless steels ferriticaustenitic duplex stainless steels. Stainless steel world 99 conference stainless steel world 1999 kci publishing bv ssw99007 page 617 100 to sulphuric acid. The machineable nature of grade 303 is due to the presence of sulphur in the steel composition. Prior to 1995 the aisi was also involved, and the standard was designated the aisisae steel grades.
A number in parentheses indicates the year of last reapproval. 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. Our five categories of stainless steels are differentiated by the alloying. It can be used in certain chemical applications due to its resistance to nitric acid. The following chapters aim to give an overall picture of the stainless world and what it can offer. Aisi 304l is the low carbon version of 304 stainless steel, aisi 316 is better than grade 304 in certain properties, corrosion resistance and heat resistance, etc. Benefits good corrosion resistance due to the 1030 percent chromium. Stainless steel is the term used to describe an extremely versatile family of. It is a low grade steel that prevents embrittlement and sensitization. The following datasheet gives more details about grade 317 stainless steel. Different types of steels pdfstainless steels, chemical. Use of stainless steel steel is unquestionably the dominating industrial constructional.
Stainless steel grade composition chart atlas steels. Other elements may be added to increase resistance to corrosion and oxidation and impart special characteristics. Well known stainless steel grade, very close to the 201 grade but with lower mechanical properties. Alloy 347347h uns s34700, s34709 a columbium stabilized austenitic stainless steel with excellent resistance to intergranular corrosion after exposure to temperatures in the chromium carbide precipitation range of 8001500f 427816c alloy 347347h 0120. The corrosion resistance of stainless steel is mostly a result of the chromium content. 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.
Stainless steel grade 430 is a nonhardenable steel containing straight chromium, and belongs to the ferritic group of steels. The carbon present in the form of ironcarbidefe3c increases the hardness and strength of the steel. 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. If you think you might be in need of stainless steel for your current project or future work, you have come to the right place. Stainless 302, 304, 304l, 305 specialty stainless steel. Similar steel grade 1 type 444 2 type 202 standard types stainless and heatresistant steels grades aisi type no.
They are the alloys of iron, carbon and other elements such as silicon, phosphorus, sulphur and manganese. Austenitic 300 series stainless steel filler metals. The aisi stopped being involved because it never wrote any of the specifications. It is a modification of type 304 in which the chromium and nickel contents are lowered to increase the cold workhardening range. For more information, please check 304 vs 316 stainless steel. Mechanical properties shown are for the commonly available form listed. It is characterised by its superior resistance to corrosion in comparison to other steels. The chemical composition of grade 317 stainless steel is outlined in the following table. They are a family of steels containing a minimum of 11% chromium, whose primary property is that of corrosion resistance.
Aspl, with iron and steel as its main business, manufactures premium steel products with high technologies and a high added value and fosters three major product categories, namely carbon steel, stainless steel and special steel. Austenitic stainless steel 310310s offers excellent resistance to oxidation up to 2000of. Astm a182 standard specification for forged or rolled alloy and stainless steel pipe flanges, forged fittings, and valves and parts for hightemperature service astm a276 standard specification for stainless steel bars and shapes cf8m heat treatment process. This steel is known for its good corrosion resistance and formability, coupled with practical mechanical properties. Stainless steel wire rods chemical composition chemical composition for information on other steel types than listed in this table, inquire us. Types 316 uns s31600, 316ls31603, 317 s31700, and 317l s31703 are molybdenum bearing austenitic stainless steels which are more resistant to general corrosion and pittingcrevice corrosion than the conventional chromiumnickel austenitic stainless steels such as type 304. Chemical composition below is the table of chemical composition for different stainless steel grades in accordance with iso 35061. Oct 29, 2019 different types of steels pdf applications, chemical composition, stainless steels, properties etcsteels are widely used materials in industry. Grade 303 is the most readily machineable of all the austenitic grades of stainless steel. The uns designation for a stainless steel consists of the letter s, followed by a fivedigit number. Because of its high chromium and moderate nickel content, alloy 310 is resistant to sulfidation and can also be used in moderately carburizing atmospheres.
Martensitic stainless steel is indispensable to keep sharpness for a long time. Grade 317 stainless steel is a modified version of 316 stainless steel. Well known stainless steel as well, with very high corrosion resistance, it is usually reserved to very aggressive. Stainless steel plate, sheet and strip specification first revision 1 scope 1. Other elements may be added to increase resistance to. For any given stainless steel, the mechanical properties, weldability, corrosion resistance, and wear and abrasion resistance depend to a large extent upon its microstructure, which in turn depends upon the alloy composition, the steel making or casting practice, the thermal history, and the finishing treatment. Atlas steels metal distribution stainless steel grade chart atlas steels specialty steels product reference manual section 9. The datasheet and specification are summarized in the following tables including. Stainless steel is a class of ironbased alloys with a minimum chromium content of 10. C hemical composition and mechanical properties 15 16 crbased 1 please consult us if you require these types of steel. Type 304 is the most versatile and widely used stainless steel. For maximum corrosion resistance passivation is recommended.
Chromenickel content refers to the percentage of chrome and nickel in the stainless steel. Chemical content identification factors and composition standards p. The uns system includes a considerably greater number of stainless steels than aisi because it incorporates all of the more recently developed stainless steels. The alloy resists oxidation up to 2010f 1100c under mildly cyclic conditions. Chemical composition of stainless steels flat products. Assintered, heat treated to h900 standard, and heat treated to h1150 standard. Hardness is measured by hv or hrb only, depending upon the sheet thickness. Type 321 stainless steel s also advantageous for high temperature service because of its good mechanical properties. Because of its economy and good resistance to oxidation and corrosion, this stainless offer many opportunities for a wide range of parts. It has been written primarily from a european perspective and may not fully reflect the practice in other regions. The machineable nature of grade 303 is due to the presence of sulphur in. These representative data were tested, measured, or calculated using standard methods and are subject to change without notice. In some instances type 304 can be used in the aswelded condition.
Even when there are chlorides in the sulphuric acid, zeron 100 has very good corrosion resistance compared to many other stainless steels, as shown in. Please contact us if you require special steel types other than those shown in the table. Aspl, with iron and steel as its main business, manufactures premium steel products with high technologies and a high added value and fosters three major product categories, namely carbon steel, stainless steel and. A stable layer of chromium oxide is formed on the surface of the steel. Different types of steels pdf applications, chemical composition, stainless steels, properties etcsteels are widely used materials in industry. Stainless steel specification and composition table chart. Heat treatment quenching, hardening, and other thermal modifications p. Stainless steel, any one of a group of alloy steels usually containing 10 to 30 percent chromium. A useful chart of relevant information on austenitic, ferritic, duplex, martensitic, and precipitation hardening grades of stainless steels including.
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