Stainless 303 Machining | 303 Machined Parts | Penta Precision

      023 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

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.

We communicate well with customers, we take care with the projects placed with us and we are consistent in our service delivery. See our Proven Process page to find out more about our winning formula.

"Customer service is always very professional with everything done to a great detail expertise. Final product is also to a very high standard." Russell - Engineering Maintenance for Production Lines

Penta Precision provides the following 303 stainless steel machining services: 

Reasons to Choose Penta:

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
023 9266 8334
or contact us via our email form

"Good supplier of small machined parts to us who has taken a proactive approach to satisfying our requirements. Good response and delivery reliability." Simon - Supply Chain Manager

Tel: 023 9266 8334

Connect with us:

Penta Precision Engineering Ltd

Unit 9 

Murrills Industrial Estate



PO16 9RD

UKAS-ISO-9001 logo