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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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