Stainiless Steel Characteristics and Applications
	AISI?	Characteristics?	Major Applications?
100 series? (Austenistic)	101	Austenitic? that is hardenable through cold working?	Furniture?
	102	Austenitic? stainless steel?	Furniture??
200 series?? (Austenistic)??	201	Austenitic? that is hardenable through cold working??	Indoor fixture (such as crushproof? rail)??
	202	Austenitic stainless steel??	Indoor fixture (such as crushproof? rail)??
300 series? (Austenistic)	301	Highly ductile, good weld ability and harden rapidly during mechanical working .? Better wear resistance and fatigue strength than 304.?	Used in the occasions which is asked the higher strength??
	302	Same corrosion resistance as 304, with slightly higher strength due to additional carbon??	The 304 variation which has the more content of C??
	303	Free machining version of 304 via addition of S and Al?	Used in the occasions which is asked to have easy cutting ability and higher luster surface??
	304	The all-purpose austenitic stainless steel??	Extensively? used in good all-around(corrosion resistance ability and form ability) machines and plants?
	304L?	Same as the 304 grade but contain less C to increase weld ability, and? slightly weaker than 304??	Used in the occasions which need welding?
	304LN?	Same as 304L, but is added N to obtain a much higher yield and tensile strength than 304L?
	308	Austenitic stainless steel?	Used in manufacturing welding rods???
	309	Better? temperature resistance than 304??	Used as filler metal when welding?? dissimilar steels
	316	The second most common grade(after 304).? Alloy addition of Mo? prevents specific forms of corrosion.?	Used in food and surgical equipments , sea and chemical industries, and building nuclear? reprocessing plants??
	316L?	Is added Mo(2-3%), so the corrosion resistance and? heat strength is? excellent.? good working hardened ability, no magnetic	Used in sea and chemical equipments, and food industry.
		Is an extra low carbon grade of 316.?	Used in stainless steel watches and marine applications.?
	321	Similar to 304 but lower risk of weld decay due to addition of Ti??	Used? as the weld in the high temperature??
	348	Has the limit? in the content of Ti???	Used in the nuclear industry?
?400 series(Ferrtic & marterntic)??	405	Ferritic stainless steel?	Used for welding applications??
	408	Heat-resistance,? but poor? corrosion resistance???
	409	Ferritic stainless steel, and the cheapest type?	Used for automobile exhausts?
	410	Martensitic stainless steel. wear-resistance, but less corrosion resistance?	Cutlery, machinery parts, and values?
	416	Easy to machine due to the additional S??
	420J1?	Martensitic stainless steel. excellent corrosion resistance and mechanical ability???	Turbine blades and parts for elevated-temperature use??
	420J2?	High strength and hardness.? poor corrosion resistance and form ability, but good wear-resistance??	Cutlery, nozzle valve seats, valves, and linear scales?
	430	Ferritic stainless steel. Good form ability, but with reduced temperature and corrosion resistance?	Daily-use durable goods, kitchen equipment, decorative articles, and architectural trimming?
	439	Ferritic stainless steel. increase Cr for improving high temperature corrosion/oxidation resistance??	Used for catalytic converter exhaust sections?
	440	A higher grade of cutlery steel, with more C, allowing for much better edge retention when properly heat-treated.? Good toughness and relative low cost. Available in four grades: 440A, 440B, 440C , and the uncommon 440F.?	Knife?
	446	For elevated temperature service?
500 series (Martensitic)??	Heat-resisting chromium alloys?
?600 series?? (Martensitic precipitation hardening alloys)	601-604?	Martensitic? low-alloy steels?
	610-613?	Martensitic secondary hardening steels?
	614-619?	Martensitic chromium steels?
	630-635?	Semiaustenitic and martensitic precipitation-hardening stainless steel?
	630	The most common PH stainless, better known as 17-4; 17% Cr, 4% Ni.?
	650-653?	Austenitic steels strengthened by hot/cold work??
	660-665?	Austenitic superalloys; all grades except alloy 661 are strengthened by second-phase precipitation?
Type 2205?		The most widely used duplex (Ferritic/austenitic) stainless steel grade. It has both excellent corrosion resistances and high strength.?