303/1.4305 Stainless Bar

Grade 303 stainless bar is a non-magnetic, austenitic, free machining stainless steel that is a modification of the basic 18Cr – 8Ni stainless steel. The addition of sulphur (S) and in some cases selenium (Se) produces excellent machining characteristics while maintaining good mechanical and corrosion-resistant properties and high resistance to oxidation. The high sulphur content that dramatically increases cutting speeds also reduces the grades formability making type 303 not readily cold workable. Sharp bending should be avoided.

303/1.4305 Stainless Bar is austenitic at all temperatures and cannot be hardened by heat treatment. Free machining grades are not generally recommended for welding. Typical applications include nuts & bolts, switchgear components, bushings, shafts and gears.

To view 303 Stainless Bar chemical analysis, specification or shapes & sizes please click on the tabs below.

Colour Code:
Colour Code
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Rounds (mm)
4.00
5.00
6.00
7.00
8.00
9.00
10.00
11.00
12.00
13.00
14.00
15.00
16.00
20.00
22.00
25.00
28.00
30.00
35.00
40.00
45.00
50.00
55.00
60.00
65.00
70.00
75.00
80.00
85.00
90.00
95.00
100.00
105.00
110.00
115.00
120.00
125.00
130.00
135.00
140.00
145.00
150.00
155.00
Rounds (inch)
3⁄32
9⁄64
5⁄32
3⁄16
1/4
9/32
5/16
11/32
3/8
13/32
7/16
31/64
1/2
9/16
5/8
11/16
3/4
7/8
1
1 1/8
1 1/4
1 3/8
1 1/2
1 5/8
1 3/4
2
2 1/4
2 1/2
3
3 1/2
4
6
7
8
Hexagons (mm)
8.00
10.00
13.00
14.00
19.00
32.00
41.00
50.00
Hexagons (inch)
3⁄16
1⁄4
5⁄16
3⁄8
7⁄16
1⁄2
5⁄8
7⁄8
1
1 3⁄16
1 1⁄4
1 5⁄16
1 3⁄8
1 7⁄16
1 1⁄2
1 5⁄8
1 7⁄8
2

This is our standard size range. If you do not see the shape, size or grade you require, please contact us as we will be happy to assist you with reaching your requirements.

EN NumberSymbolAISIUNSBS 970 1983Material Standard
1.4305X8CrNiS18-9303S30300303S31EN 10088-3
CMnSiPSCrNiFe
1.5 max2.0 max1.0 max.2 max.15-3517-198-10Bal

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