Stainless Steel Specification and Composition Chart

Stainless Steel Specification and Composition Table Chart

Metals and Materials Table of Contents

Chemical Composition Chart Stainless Steel

UNS#	ALLOY	C	Mn	Cr	Mo	Ni	Fe	Si	P	S	Al	Cu	Zn	OTHER
S30400	SST-304	.08	2	18-20	--	8-10.5	BAL	1	.045	.03	--	--	--	--
S30403	SST-304L	.03	2	18-20	--	8-12	BAL	1	.045	.03	--	--	--	--
S31600	SST-316	.08	2	16-18	2-3	10-14	BAL	1	.045	.03	--	--	--	--
S31603	SST-316L	.03	2	16-18	2-3	10-14	BAL	1	.045	.03	--	--	--	--
S32100	SST-321	.08	2	17-19	--	9-12	BAL	1	.045	.03	--	--	--	Ti 5 x C Min.
N08330	SST-330	.08	2	17-20	--	34-37	BAL	.75-1.5	.03	.03	--	1	--	--
S34700	SST-347	.08	2	17-19	.75	9-13	BAL	1	.045	.03%	--	.50	--	--
S41000	SST-410	.15	1	11.5-13.5	--	--	BAL	1	.045	.03	--	--	--	--
S43000	SST-430	.12	1	16-18	--	--	BAL	1	.045	.03	--	--	--	--

303 - Free machining for use in automatic machining operations. High corrosion resistant

304 - The most widely used of the stainless steels. Offers good corrosion resistance to many environments. Has good formability and can be readily welded.

309 - Used in high temperature applications. High scale resistance. Corrosion resistance superior to 304. Resists corrosion when welded.

316 - Better corrosion resistance as well as higher strength at elevated temperatures than 304. Often used for pumps, valves, chemical equipment and marine applications. Most popular of stainless steels.

409 - Lowest cost stainless - used extensively in automotive exhaust systems. Excellent formability and weldability. Because of its economy and good resistance to oxidation and corrosion, this stainless offer many opportunities for a wide range of parts.

410 - Heat-treatable stainless used widely where corrosion is not severe - air, fresh water, some chemicals and food acids.

416 - Free machining variation of 410 with useful corrosion resistance to natural food acids, basic salts, water and most atmospheres.

416 - Free-machining variation of 410 with useful corrosion resistance to natural food acids, basic salts, water and atmospheres

430 - Is the most popular of the non-hardenable chromium stainless steels. It combines good corrosion and heat resistance with good mechanical properties. Oxidation resistance to 1500 deg F widely used in both industrial and consumer products.

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