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X8CrNiS18-9 - Nr.1.4305

Chromium-nickel austenitic stainless steel with the addition of sulfur, which improves machinability by chip removal with machine tools, reducing however the resistance to corrosion in aggressive environments. The special “Plus” processing allows performances to be further improved during machining in terms of surface finish, tool life and machine productivity.

References and Comparable Standards

Standard Reference: EN 10088-3: 2014 (Hot-rolled and bright products)
EUROPE ITALY GERMANY FRANCE UK USA
EN 10088-3: 2005

(UNI 6900:71)

 (DIN 17440-85)

(NF A 35-574-90)

(BS 970 pt. 3 -91)

 AISI
Grade N°   Werkstoff N°      
X8CrNiS18-9 1.4305 X10CrNiS1809 X8CrNiS18-09 1.4305 Z8CNF18-09 303S31 303

Chemical Composition (Cast Analysis) (%)

C / max Si / max Mn / max P / max S N/ max Cr Cu / max Ni
0,10 1,00 2,00 0,045 0,15÷0,35 0,10 17,0÷19,0 1,00 8,0÷10,0

Mechanical Properties - Rough Turned (1X) In The Annealed Condition

Size
(mm)		 Hardness HB max* ** Rp 0,2 (MPa) min Rp 1 (MPa) min* Rm (MPa)** A5 (%) min** Resistance to intergranular corrosion
in the delivery condition in the welded condition
d≤100 230 190 225 500÷750 35 NO NO

* Only for guidance
** The maximum HB values may be raised by 100HB or the tensile strenght value may be raised by 200 MPa and the
minimum A% value may be lowered to 20% for bars of ≤35 mm

Mechanical Properties - Cold Drawn (2H, 2B) And Ground Bars (2G) In The Solution Annealed Condition

Size (mm) Rp 0,2 (MPa) min Rm (MPa)0 A5 (%) min*
d≤10 400 600÷950 15
10<d≤16 400 600÷950 15
16<d≤40 190 500÷850 20
40<d≤63 190 500÷850 20
63<d≤100 190 500÷750 35

* Values valid only for size ≥5 mm

Mechanical Properties - Cold Drawn Wire And Coils (2H)

Tensile strength levels Rm (MPa)
+C 600 600÷800
+C 700 700÷900
+C 800 800÷1000
+C 900 900÷1100
+C 1000 1000÷1250
+C 1100 1100÷1350
+C 1200 1200÷1450
+C 1400 1400÷1700
+C 1600 1600÷1900

Note: the desired tensile strength level shall be evaluated depending on diameter required

Mechanical Properties - Cold Drawn Wire And Coils In The Solution Annealed Condition (2D)

Size A (%) max Rm (MPa) max
0,10≤d≤0,20 20 1050
0,20≤d≤0,50 30 1000
0,50≤d≤1,00 30 950
1,00≤d≤3,00 30 900
3,00≤d≤5,00 35 850
5,00≤d≤16,00 35 800

Note: If skin passed, Rm might be increased by up to 50 MPa

Working Temperatures Recommended

Operation °C
Hot forgings deformation 900÷1200
Solution annealing (water, air)    1000÷1100
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1.4435
Rodinox® for Coils Rodinox® Plus for Bars
Rodinox® for Coils Rodinox® Plus for Bars

Rodinox® for Coils Rodinox® Plus for Bars