Stainless Steel 303 | 1.4305 | X8CrNiS18-9 | CNC machining service | Custom Stainless Steel 303 | 1.4305 | X8CrNiS18-9 parts

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CNC Machining Service for Stainless steel 303 | 1.4305 | X8CrNiS18-9

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Material type

Metal
Material name

Stainless steel 303 | 1.4305 | X8CrNiS18-9
Alternative names

X8CrNiS18-9, 1.4305
Process compatibility

CNC machining

Grade 303 stands out as the most machineable among all austenitic stainless steel grades. Essentially, it is a machined variant of stainless steel 304. This enhanced machinability is attributed to the elevated sulphur content in its chemical composition. While sulphur improves machinability, it slightly diminishes corrosion resistance and toughness when compared to stainless steel 304.

Sunnyhowe

Mechanical properties

Ultimate tensile strength

580 - 700 MPa

Yield strength

205 - 350 MPa

Young's modulus (modulus of elasticity)

192 - 200 GPa

Elongation at break

40 - 50 %

Physical properties

Corrosion resistance

Moderate

Magnetism

Non-magnetic

UV resistance

Excellent

Weldability

Very Poor

Thermal properties

Maximum service temperature

750 - 925 °C

Thermal expansion coefficent

16.2 - 17.9 10^-6/ºC

Thermal conductivity

15.8 - 16.5 W/(m⋅°C)

Electrical properties

Electrical resistivity

75 - 85 μΩ*cm

ESD Safety

Yes

Post treatments

Post-Processing

Not suitable

Anodizing compatibility

Not suitable

Common applications

Aircraft applications including fittings

Shafts and spindles

Automatic screw machine applications

Drilled or tapped holes

Medical devices with screw threads

Pump and valve parts

Nuts and bolts

Architectural applications

Stainless Steel 303 CNC Machining Applications & Parts

Stainless Steel 303 is the quintessential "free-machining" austenitic stainless steel, modified with sulfur to significantly improve machinability while maintaining good mechanical properties and corrosion resistance. It is ideal for high-volume CNC production.

Typical Parts We Machine from Stainless Steel 303:

Automated Machinery: Shafts, gears, nuts, bolts, fittings
Food & Beverage Equipment: Valve components, fittings, pump parts
Medical & Surgical: Instrument housings, non-implant surgical tool components

Our Machining Advantage:

We leverage the free-machining properties of 303 to achieve high production rates, exceptional surface finishes, and extended tool life, making it a cost-effective choice for complex parts.

Get an Instant Quotefor your custom Stainless Steel 303 parts today.

Tagged: Metal Stainless steel

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Stainless steel 303 | 1.4305 | X8CrNiS18-9

Stainless Steel 303 CNC Machining Applications & Parts

Typical Parts We Machine from Stainless Steel 303:

Our Machining Advantage:

Let's Machine Your Vision, Together.