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1.4305 stainless steel

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Austenitic chromium-nickel stainless steel with added sulphur –
"Free-cutting stainless steel" (1.4305)

Code

X10CrNiS18-9

US standard (AISI)

303

Composition

Alloying components [%]

C:  0 - 0.10

Cr: 17.00 - 19.00

Cu: 0 - 1.0

N: 0 - 0.10

Ni: 8.00 - 10.00

Mn: 0 - 2.00

P:  0 - 0.045

S:  0.150 - 0.350

Si: 0 - 1.00

Remainder: Fe

Stainless steel grade

A1

Density [g/cm³]

7.9

Nickel migration

[µg/(cm² x week)] in artificial perspiration (pH 4.5)

<0.5

Yield point

Rp0.2 [N/mm²]

≥190

Tensile strength

Rm [N/mm²]

500 - 700

Corrosion resistance

- Medium

- Lower resistance than 1.4301 due to the addition of sulphur

- Not resistant to intergranular corrosion

Machinability

Very good

Weldability

Poor

(Friction welding possible)

Other properties

- Austenitic non-magnetic structure with sulphur added for good machinability

- Moderately suitable for mechanical polishing

- Suitability for electropolishing: medium

- For use at temperatures up to 500°C

- Not suitable for prolonged skin contact due to the high nickel migration rate

Main uses

Predominantly used for turned parts that are subject to medium levels of corrosive stress in the following sectors:         

- Automotive industry

- Fittings

- Food industry

- Kitchen equipment and decorative parts

- Machine and plant construction

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