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Type 303 is "18-8" chromium-nickel stainless steel modified by the addition of selenium or sulphur, as well as phosphorus, to improve machinability and non- seizing properties. It is the most readily machinable of all the chromium-nickel arades and has good corrosion resistance It is non-magnetic in the annealed condition and not hardenable by heat treatment. Tensile strength and hardness can be increased by cold working. It is manufactured by the electric-furnace process and meets the exacting requirements of the aircraft industry.

UNS S30300. S30323

Color Marking
Type 303Se
Annealed Bars: Ends painted Purple
High Tensile Bars (Condition B): Ends painted Brown

Stock Lengths 10' to 12'

Max. Brinell 235
Unit of Measure
1 

Size

Estimated Weight per Foot

Estimated Weight 12-Ft. Bar

3/16 N/A .1036 lb N/A 1.243 lb
1/4 N/A .1842 lb N/A 2.210 lb
5/16 N/A .2878 lb N/A 3.454 lb
3/8 N/A .4145 lb N/A 4.973 lb
7/16 N/A .5641 lb N/A 6.769 lb
1/2 N/A .7368 lb N/A 8.842 lb
9/16 N/A .9325 lb N/A 11.19 lb
5/8 N/A 1.151 lb N/A 13.82 lb
11/16 N/A 1.393 lb N/A 16.72 lb
3/4 N/A 1.658 lb N/A 19.89 lb
13/16 N/A 1.946 lb N/A 23.35 lb
7/8 N/A 2.257 lb N/A 27.08 lb
15/16 N/A 2.590 lb N/A 31.08 lb
1 N/A 2.947 lb N/A 35.37 lb
1 1/16 N/A 3.327 lb N/A 39.93 lb
1 1/8 N/A 3.730 lb N/A 44.76 lb
1 3/16 N/A 4.156 lb N/A 49.87 lb
1 1/4 N/A 4.605 lb N/A 55.26 lb
1 5/16 N/A 5.077 lb N/A 60.93 lb
1 3/8 N/A 5.572 lb N/A 66.87 lb
1 7/16 N/A 6.090 lb N/A 73.08 lb
1 1/2 N/A 6.631 lb N/A 79.56 lb
1 5/8 N/A 7.783 lb N/A 93.39 lb
1 11/16 N/A 8.393 lb N/A 100.7 lb
1 3/4 N/A 9.026 lb N/A 108.3 lb
1 7/8 N/A 10.36 lb N/A 124.3 lb
1 15/16 N/A 11.06 lb N/A 132.8 lb
2 N/A 11.79 lb N/A 141.5 lb
2 1/8 N/A 13.31 lb N/A 159.7 lb
2 3/16 N/A 14.10 lb N/A 169.2 lb
2 1/4 N/A 14.92 lb N/A 179.0 lb
2 5/16 N/A 15.76 lb N/A 189.1 lb
2 3/8 N/A 16.62 lb N/A 199.5 lb
2 1/2 N/A 18.42 lb N/A 221.0 lb
2 5/8 N/A 20.31 lb N/A 243.7 lb
2 3/4 N/A 22.29 lb N/A 267.5 lb
2 13/16 N/A 23.31 lb N/A 279.8 lb
2 7/8 N/A 24.36 lb N/A 292.3 lb
3 N/A 26.53 lb N/A 318.3 lb
Unit of Measure
1