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Type 303 Stainless SteelType 303 Stainless Steel

Readily Machinable Stainless Steel

Type 303 stainless steel is an alloy which is the most readily machinable austenitic stainless steel available today.

This is due to the presence of sulphur in the material composition although improved machinability is at a cost - the sulphur content results in a decrease in corrosion resistance and also a slight lowering in toughness. But as with most austenitic grades the toughness is still excellent. Weldability of the alloy is poor. Type 303 is used in a variety of engineering industries.

Key Features:

Type 303 stainless steel is an austenitic steel grade with very good machinability but reduced formability. The material is not recommended for applications where welding is required. Type 303 has lower resistance to corrosion when compared with 1.4301.

Technical Assistance

Our knowledgeable staff and resident metallurgists will be pleased to assist you further on any technical topic. Smiths Metal Centres Limited also boasts an in-house UKAS Accredited Testing Laboratory which is unique within the multi-metal and plastic stockholding sector. We believe this underlines our total commitment to quality and our ethos of being the complete service provider.



Download Type 303 Stainless Steel Datasheet

Typical Applications:

  • Aircraft fittings
  • Gears
  • Nuts and bolts
  • Electrical switchgear components
  • Bushings
  • Shafts


We offer Type 303 Stainless Steel in round bar, wire and hexagon. Smiths Metal Centres has processing operations at all our UK service centre locations. We have a fully automated magazine feed CNC rod blanking line and with more than 30 power saws across the Group, we can cut your material to your size requirements.

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To find out more about Smiths Metal Centres extensive range of high quality stainless steel products, click on one of our products on the side menu of this web page.

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