Material: 1.4303

Information about the selected material

Assignment to new and old standards

Standard Description
EN 10088-3 1.4303 X4CrNi 18-12
EN 10095 -
AISI 305
BS 305 S17 / 305 S19
JIS SUS 305 / SUS 305 J1
DIN 17440 1.4303

General properties:

Property Rating
corrosion resistance good
Mechanical properties middle
Malleability very good
Weldability excellent
Machinability low

Mechanical properties:

Property Standard Value
Yield strength (N/mm²) Rp0,2 = 190
Tensile strength (N/mm²) Rm 500-700
Impact strength (J) at 25°C ISO-V = 100
Hardness HB = 215

Physical Properties:

Property Value
Density (kg/dm³) =7,9
Electrical resistance at 20°C (O mm²/m) 0,73
Magnetisability not-existent
Thermal conductivity at 20°C (W/m K) 15
Specific conductivity at 20°C (J/kg K)) 500

Special features

  • amagnetic quality (µ = 1,3)
  • high cold formability
  • suitable for low temperatures / usable up to 600°C

Main usage

  • Automotive industry
  • Chemical industry
  • Mechanical engineering
  • Decorative purposes and kitchen equipment
  • Electronic equipment
  • Food industry
  • Screw industry

Corrosion resistance

In natural environmental media (water ,rural and urban atmosphere) 1.4303 has significant chlorine and salt concentrations. This quality is not resistant to sea water and must not be used for such applications as well. Just as 1.4306, this steel is not suitable for use in swimming pools or in their vicinity. The resistance to reducing acids is limited to low concentrations and temperatures.


  • weldable with or without filler metal
  • A heat treatment after welding is generally not necessary
  • The resulting tarnish reduces corrosion resistance and should be removed mechanic or chemical