304 - Materials - Technical

304 Stainless Steel

Similar Grades
BS 304S16
Euronorm No. 1.4301
Euronorm Name XDCrNi189

BSO Products made from this material
Collars, Couplings, Dowel Pins, Gears, Screws, Shafting, Split Pins, Shoulder Screws, Springs

304 stainless steel is easy to machine and very widely used. Due to the wide usage, 304 stainless steel is usually cheaper than other grades when purchased in the unmachined form. It should always be remembered though, that finished machined parts have their own input costs. It can’t be assumed that two similar sized shafts will be cheaper in 304 stainless than in 316 stainless simply because the base material cost is cheaper.

The main component of the steel is Fe (Iron) with the addition of the elements shown in the following chart

Max. % Chemical Composition
C Si Mn P S Cr Mo Ni
0.08 1.0 2.0 0.045 0.03 18.0 to 20.0 - 8.0 to 10.5

For slightly less corrosion resistance but better machinability see 303 Grade

For higher resistance to pitting and crevice corrosion in chloride environments but lower machinability see 316 Grade

For better machinability but lower corrosion resistance, or if hardening by heat treatment is required see 416 Grade

You can find 304 Stainless items in the Bearing Shop Online 304 Stainless Online Catalogue pages.

The Small Parts and Bearings has a much larger range of engineering supplies.

Hobby and Engineering Supplies lists a smaller range of products and only the most popular items in each range. They also list many additional hobby specific categories.

For the best range of miniature and small bearings please try the Miniature Bearings Australia website. Miniature Bearings Australia also list a large variety of miniature engineering products.

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