Metal

Stainless steel 303

1.4305 | X8CrNiS18-9

ProcessCNC Machining

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* Property values are for reference and may vary by alloy, temper, and processing conditions.

Stainless steel 303 enhances its machinability through the addition of sulfur, making it exceptionally easy to cut at high speeds while producing a high surface finish. It is particularly suitable for metal components requiring precise structural accuracy and superior surface smoothness. However, stainless steel 303 exhibits poor corrosion resistance, significantly worse than 304/316 grades.

Material Properties

Mechanical Properties

Yield strength
240 - 310 MPa
Tensile strength
540 - 690 MPa
Elongation
40-50%
Hardness
160 - 190 HB (Annealed)
Young's modulus
193 - 200 GPa

Thermal properties

Maximum operating temperature
Thermal conductivity
16.2 - 21.5 W/m·K（20°C）
Coefficient of thermal expansion
17.3 μm/m·K（20-100°C）

Physical Properties

Density
7.98 g/cm³

Electrical properties

Electrical resistivity
71.8 - 72.5 μΩ*cm

Manufacturability

Manufacturability-Corrosion resistance
Fair
Manufacturability-Weldability
Very Poor

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Surface Finishing

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Stainless steel 303

Need this material for your project?

Material Properties

Mechanical Properties

Thermal properties

Physical Properties

Electrical properties

Manufacturability

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