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Stainless Steel / 303 SULF ANN

303 SUL is an austenitic stainless steel melted as AOD melt type and offers excellent machinability. The machinable nature of Grade 303 stainless steel is due to the presence of Sulphur in the steel's composition. The Sulphur improves machining and provides non- seizing properties, but also causes a decrease in the corrosion resistance and a slight lowering of the toughness. The corrosion resistance of grade 303 stainless steel is lower than that for 304. The toughness is still excellent as with other austenitic grades. 303 is a 18-8 chromium-nickel stainless steel that is non-magnetic in the annealed condition and not hardenable by heat treatment. Stainless Steel 303 is widely used in the screw machine industry, as well as for use in shafts, valves and fittings. Stainless Steel 303 is not recommended for vessels containing gases or liquids under high pressure. (UNS:S30323)

Chemical Makeup

Element	Min	Max
Carbon, C	–	0.15
Manganese, Mn	–	2
Silicon, Si	–	1
Sulfur, S	0.15	-
Phosphorus, P	-	0.15
Chromium, Cr	17	19
Nickel, Ni	8	10
Copper, Cu	-	1
Molybdenum, Mo	-	1
Selenium, Se	-	-

Common Applications

Aerospace
Industrial

Benefits

Excellent Machinability
Corrosion Resistance
Nongalling Properties

We stock 303 SULF ANN to the following specifications:

AMS-5640 TYPE 1
ASTM-A-320 GRD B8F CL.1 (EXC. FLTS)
ASTM-A-484
ASTM-A-582
MIL-S-7720
MIL-W-52263
QQS-763C
QQS-764 B

Click on a cross-section to see the sizes we stock:

Flat
hex
Round
Square

Stainless Steel
303 SULF ANN
Hex
43 sizes and conditions:

CD - Cold Drawn
1/8 - CD
5/32 - CD
3/16 - CD
7/32 - CD
15/64 - CD
1/4 - CD
9/32 - CD
5/16 - CD
11/32 - CD
3/8 - CD
13/32 - CD
7/16 - CD
15/32 - CD
1/2 - CD
17/32 - CD
9/16 - CD
5/8 - CD
21/32 - CD
11/16 - CD
3/4 - CD
13/16 - CD
7/8 - CD
15/16 - CD
1 - CD
1-1/16 - CD
1-1/8 - CD
1-3/16 - CD
1-1/4 - CD
1-5/16 - CD
1-3/8 - CD
1-7/16 - CD
1-1/2 - CD
1-9/16 - CD
1-5/8 - CD
1-3/4 - CD
1-7/8 - CD
2 - CD
2-1/8 - CD
2-1/4 - CD
2-3/8 - CD
2-1/2 - CD
2-5/8 - CD

Stainless Steel
303 SULF ANN
Flat
128 sizes and conditions:

CD - Cold Drawn HR&P - Hot Rolled and Pickled HR&P - Hot Rolled and Pickled
3/16 X 3/4 - HR&P
3/16 X 7/8 - HR&P
3/16 X 1 - HR&P
3/16 X 1-1/4 - HR&P
3/16 X 1-1/2 - HR&P
3/16 X 1-3/4 - HR&P
3/16 X 2 - HR&P
3/16 X 2-1/2 - HR&P
3/16 X 3 - HR&P
1/4 X 3/4 - HR&P
1/4 X 7/8 - HR&P
1/4 X 1 - HR&P
1/4 X 1-1/4 - HR&P
1/4 X 1-1/2 - HR&P
1/4 X 1-3/4 - HR&P
1/4 X 2 - HR&P
1/4 X 2-1/4 - HR&P
1/4 X 2-1/2 - HR&P
1/4 X 2-3/4 - HR&P
1/4 X 3 - HR&P
1/4 X 3-1/4 - HR&P
1/4 X 3-1/2 - HR&P
1/4 X 4 - HR&P
1/4 X 4-1/2 - HR&P
1/4 X 5 - HR&P
1/4 X 6 - HR&P
5/16 X 3/4 - HR&P
5/16 X 7/8 - HR&P
5/16 X 1 - HR&P
5/16 X 1-1/4 - HR&P
5/16 X 1-1/2 - HR&P
5/16 X 1-3/4 - HR&P
5/16 X 2 - HR&P
5/16 X 2-1/4 - HR&P
5/16 X 2-1/2 - HR&P
5/16 X 3 - HR&P
3/8 X 5/8 - HR&P
3/8 X 3/4 - HR&P
3/8 X 7/8 - HR&P
3/8 X 1 - HR&P
3/8 X 1-1/4 - HR&P
3/8 X 1-1/2 - HR&P
3/8 X 1-3/4 - HR&P
3/8 X 2 - HR&P
3/8 X 2-1/4 - HR&P
3/8 X 2-1/2 - HR&P
3/8 X 3 - HR&P
3/8 X 3-1/2 - HR&P
3/8 X 4 - HR&P
3/8 X 4-1/2 - HR&P
3/8 X 5 - HR&P
3/8 X 6 - HR&P
7/16 X 3/4 - HR&P
7/16 X 1 - HR&P
1/2 X 5/8 - HR&P
1/2 X 3/4 - HR&P
1/2 X 7/8 - HR&P
1/2 X 1 - HR&P
1/2 X 1-1/4 - HR&P
1/2 X 1-1/2 - HR&P
1/2 X 1-3/4 - HR&P
1/2 X 2 - HR&P
1/2 X 2-1/4 - HR&P
1/2 X 2-1/2 - HR&P
1/2 X 2-3/4 - HR&P
1/2 X 3 - HR&P
1/2 X 3-1/2 - HR&P
1/2 X 4 - HR&P
1/2 X 4-1/2 - HR&P
1/2 X 5 - HR&P
1/2 X 5-1/2 - HR&P
1/2 X 6 - HR&P
5/8 X 3/4 - HR&P
5/8 X 7/8 - HR&P
5/8 X 1 - HR&P
5/8 X 1-1/4 - HR&P
5/8 X 1-1/2 - HR&P
5/8 X 1-3/4 - HR&P
5/8 X 2 - HR&P
5/8 X 2-1/4 - HR&P
5/8 X 2-1/2 - HR&P
5/8 X 3 - HR&P
5/8 X 4 - HR&P
5/8 X 4-1/2 - HR&P
5/8 X 5 - HR&P
5/8 X 6 - HR&P
3/4 X 1 - HR&P
3/4 X 1-1/4 - HR&P
3/4 X 1-1/2 - HR&P
3/4 X 1-3/4 - HR&P
3/4 X 2 - HR&P
3/4 X 2-1/4 - HR&P
3/4 X 2-1/2 - HR&P
3/4 X 3 - HR&P
3/4 X 3-1/4 - HR&P
3/4 X 3-1/2 - HR&P
3/4 X 4 - HR&P
3/4 X 4-1/2 - HR&P
3/4 X 5 - HR&P
3/4 X 6 - HR&P
7/8 X 1 - HR&P
7/8 X 1-1/4 - HR&P
7/8 X 1-1/2 - HR&P
7/8 X 2 - HR&P
7/8 X 2-1/4 - HR&P
7/8 X 2-1/2 - HR&P
7/8 X 3 - HR&P
7/8 X 4 - HR&P
1 X 1-1/4 - HR&P
1 X 1-1/2 - HR&P
1 X 1-3/4 - HR&P
1 X 2 - HR&P
1 X 2-1/4 - HR&P
1 X 2-1/2 - HR&P
1 X 3 - HR&P
1 X 3-1/4 - HR&P
1 X 3-1/2 - HR&P
1 X 4 - HR&P
1 X 4-1/2 - HR&P
1 X 5 - HR&P
1 X 6 - HR&P
1-1/8 X 1-1/4 - HR&P
1-1/8 X 1-1/2 - HR&P
1-1/8 X 1-3/4 - HR&P
1-1/8 X 2 - HR&P
1-1/8 X 2-1/2 - HR&P
1-1/8 X 3 - HR&P

Stainless Steel
303 SULF ANN
Round
125 sizes and conditions:

CD - Cold Drawn CG - Centerless Ground CG - Centerless Ground PG - PG - RT - Hot Rolled and Rough Turned RT - Hot Rolled and Rough Turned
1/16 - CD
5/64 - CD
3/32 - CD
7/64 - CD
1/8 - CD
.130 - CD
9/64 - CD
5/32 - CD
11/64 - CD
3/16 - CD
.1925 - CD
13/64 - CD
7/32 - CD
15/64 - CD
1/4 - CD
.255 - CD
17/64 - CD
9/32 - CD
19/64 - CD
5/16 - CD
.3175 - CD
21/64 - CD
11/32 - CD
23/64 - CD
3/8 - CD
.380 - CD
25/64 - CD
13/32 - CD
27/64 - CD
7/16 - CD
.4425 - CD
29/64 - CD
15/32 - CD
31/64 - CD
1/2 - CD
.505 - CG
33/64 - CG
17/32 - CG
9/16 - CG
.5675 - CG
19/32 - CG
5/8 - CG
.630 - CG
21/32 - CG
11/16 - CG
23/32 - CG
3/4 - CG
.755 - CG
25/32 - CG
13/16 - CG
27/32 - CG
7/8 - CG
.880 - CG
29/32 - CG
15/16 - CG
31/32 - CG
1 - CG
1.005 - CG
1-1/16 - CG
1-1/8 - CG
1-3/16 - CG
1-1/4 - CG
1-5/16 - CG
1-3/8 - CG
1-7/16 - CG
1-1/2 - CG
1-9/16 - CG
1-5/8 - CG
1-11/16 - CG
1-3/4 - CG
1-13/16 - CG
1-7/8 - CG
1-15/16 - CG
2 - CG
2-1/16 - CG
2-1/8 - CG
2-3/16 - CG
2-1/4 - CG
2-5/16 - CG
2-3/8 - CG
2-7/16 - CG
2-1/2 - CG
2-9/16 - CG
2-5/8 - CG
2-3/4 - CG
2-7/8 - CG
2-15/16 - CG
3 - CG
3-1/8 - RT
3-1/4 - RT
3-3/8 - RT
3-1/2 - RT
3-5/8 - RT
3-3/4 - RT
3-7/8 - RT
4 - RT
4-1/8 - RT
4-1/4 - RT
4-3/8 - RT
4-1/2 - RT
4-5/8 - RT
4-3/4 - RT
5 - RT
5-1/4 - RT
5-1/2 - RT
5-3/4 - RT
6 - RT
6-1/4 - RT
6-1/2 - RT
6-3/4 - RT
7 - RT
7-1/4 - RT
7-1/2 - RT
7-3/4 - RT
8 - RT
8-1/4 - RT
8-1/2 - RT
8-3/4 - RT
9 - RT
9-1/2 - RT
10 - RT
10-1/2 - RT
11 - RT
12 - RT

Stainless Steel
303 SULF ANN
Square
31 sizes and conditions:

CD - Cold Drawn HR&P - Hot Rolled and Pickled HR&P - Hot Rolled and Pickled
1/8 - CD
3/16 - CD
1/4 - CD
5/16 - CD
3/8 - CD
7/16 - CD
1/2 - CD
9/16 - CD
5/8 - CD
11/16 - CD
3/4 - CD
7/8 - CD
1 - CD
1-1/8 - CD
1-1/4 - CD
1-3/8 - CD
1-1/2 - CD
1-5/8 - CD
1-3/4 - CD
2 - CD
2-1/4 - HR&P
2-1/2 - HR&P
2-3/4 - HR&P
3 - HR&P
3-1/2 - HR&P
4 - HR&P
4-1/2 - HR&P
5 - HR&P
5-1/2 - HR&P
6 - HR&P

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