HobbyParts 303 - Materials - Technical Information

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HobbyParts 303 - Materials - Technical Information

303 Stainless Steel

Similar Grades
A1
Euronorm No. 1.4305
Euronorm Name X8CrNiS189
JIS SUS303
BS 303S31
UNS S30300
En 58M SS 2346

MBA Products made from this material
Clevis Pins, Collars, Couplings, Dowel Pins, Gears, Screws, Shafting, Shoulder Screws, Springs

303 is an austenitic stainless steel, slightly magnetic and very corrosion resistant. 303 is a free-machining stainless steel. The free-machining characteristics are provided by adding sulphur and/or selenium. Using 303 stainless steel can be more cost effective than using other stainless steels since 303 takes less time to machine, machine tool bits will last longer. 303 is similar to 304 grade (A2 or 18/8) but is easier to machine.

Maximum Brinell Hardness (HB) is 262.

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
0.1	1.0	2.0	0.2	0.15	17.0 to 19.0	-	8.0 to 10.0

For better corrosion resistance but lower machinability see 304 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

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H.E. Supplies (Hobby Engineering Supplies) offers thousands of products including remote controlled cars, planes, boats, and helicopters. We stock spare parts for remote controlled models. Our range includes the popular Solarbotics solar model kits and spares. We also distribute the full range of miniature engineering products from Miniature Bearings Australia. This range includes small bearings, timing pulleys, timing belts, seals, o-rings, gears and more. Also available from our store in Mansfield Queensland are a full range of lubricants, adhesives, kites, balsa wood and plastic rod and sheet materials. See our Online Catalogue for more information. Our main business is handled from our sales counter and showroom at 186 Wecker Road Mansfield, Queensland, Australia, but we also sell by phone, fax, online and mail order. We offer all of our hobby parts through our online store and some of the more popular MBA items. If you would like to purchase other MBA items online, Small Parts and Bearings offer the full range in their online catalogue.

Using the links at the top of this page you will find extensive information including catalogues (Products and Store link), technical data, and other product specific information.

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