Stainless 303 Machining | 303 Machined Parts | Penta Precision

sales@pentaprecision.co.uk       +44 (0) 23 9266 8334

303 Machining

A Guide to stainless steel 303 CNC Machined Parts: Properties, Applications and Design Considerations

What is 303?303 Stainless Processing Machinery Replacement Part

Stainless steel 303 is the most readily machineable austenitic stainless steel.

The addition of Sulphur in the steel composition improves machining but also causes a decrease in the corrosive resistance and a slight reduction of the toughness when compared to 304.

Main Attributes of Stainless 303:

  • Excellent machinability
  • Non-seizing and non-galling properties make it ideal for moving parts
  • Good mechanical resistant properties 
  • Good corrosion resistance in mild environments (less corrosion resistance than 304)
  • Not suitable for moist/marine environments
  • Non-magnetic
  • Good resistance to oxidisation when intermittently exposed to temperatures of up to 760°C and continuous exposure to 870°C although not recommended for continuous use at 425-860°C as sensitive to carbide precipitation
  • Poor weldability

Get Stainless 303 Machining Quote

Need a part machined by an experienced and reliable components manufacturer? Simply complete our short form to receive your no obligation quotation.

Detailed information about 303 for designers can be found in the tabs below. Please note: this information is provided as a guide only.

303 Machining Service - Stainless 303 Milling & Turning

Penta Precision supplies highly accurate stainless 303 machined parts throughout the UK. Customers turn to us when they have had quality and delivery issues with their existing suppliers and need a reliable precision machining partner.

Penta Precision provides the following 303 stainless steel machining services: 

  • CNC milling – prototypes & large batch runs
  • CNC turning – prototypes & large batch runs
  • Insert installation
  • Part marking
  • Manual milling
  • Manual turning
  • Machining design advice
  • Machining drawing service

Reasons to Choose Penta:

  • ISO 9001:2015 quality assurance
  • Consistent high quality machined parts
  • Reliable delivery dates - our track record speaks volumes
  • Exceptional customer service and communication
  • Machining design advice
  • Extensive experience in our field
What Makes Penta Different?

There are 3 key elements that run through the core of our company and staff at every level to ensure we deliver an exemplary service that goes above and beyond. We like to call these our 3 C's:

  • We Communicate well 
  • We take Care at each stage
  • Our service is Consistent

See our ‘Proven Process’ page to find out more

We are regularly machining 303 for customers all over the UK. Our customers depend on our machining expertise as well as our outstanding delivery performance, to machine the highest quality parts. If you'd like to discuss how we can help you with your stainless 303 machining requirements, here's a list of ways to get in touch with us.

Want to know more about Penta?

Can we meet your
303 stainless steel machining needs?
Call our engineering team on
+44 (0) 23 9266 8334
or contact us via our email form

"Penta were able to take original part designs and use their extensive engineering experience to make improvements. All of which was handled with exemplary customer service, which left me feeling in complete control of the project "Robert - Project Engineer

Tel: +44 (0) 2392 668 334

Fax: +44 (0) 2392 668 335

Connect with us:

Penta Precision Engineering Ltd

Aspen House

Airport Service Road

Portsmouth

Hampshire

PO3 5RA

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