Page 1 - SA 304

PRODUCT DATA SHEET

Corrosion Stainless Steel

AUSTENITIC STAINLESS STEEL GRADE

SA 304 is a 18Cr-9Ni austenitic stainless steel. The grade contains small amount of
ferrite ( 3%) after solution annealing (1000-1100°C – 1832-2012°F) and water
quenching.

This kind of steel is one of the basic grades of the stainless steels range. Its low
carbon content ensures better ductility and avoids the intergranular corrosion,
even on welded pieces without ulterior water quenching.

Alloys SA 304 exhibits an austenitic microstructures free of deleterious carbide
precipitations at grainboundaries.

The main properties of SA 304 are :
- basic corrosion resistance
- resistance against intergranular corrosion
- high ductility

STANDARDS EURONORM .............................. 1.4307 X2CrNi18-11
AFNOR ...................................... Z3 CN 18-9
ASTM. ........................................ A 240 – TP 304L
UNS S30403

Typical values (Weight %)

CHEMICAL C Cr Ni Mo N Others
ANALYSIS 0.020 18.5 9.2 - 0.05 -
PREN (%Cr+3.3%Mo+16%N)  18
Nickel content may be modified to be conform to 1.4306 grade.

MECHANICAL Tensile properties after water quenching

PROPERTIES Minimum guaranteed values * Typical values
°C °F Y.S. 0.2% Y.S. 1% UTS Y.S. 0.2% Y.S. 1% UTS El%
MPa Ksi MPa Ksi MPa Ksi MPa Ksi MPa Ksi MPa Ksi
20 68 200 29 240 35 520 75 265 38 305 44 570 83 45
/ 650 / 95
100 212 147 21 181 26 410 60 240 34 280 40 480 70 40
200 392 118 17 147 21 360 52 220 32 240 34 440 63 35
300 572 100 15 127 19 340 50 170 25 190 27 420 62 35
400 752 89 13 116 17 330 48 150 22 165 24 400 58 30
500 932 81 12 109 16 320 47 130 20 145 21 380 56 30
*Following EN 10088 hot rolled plates - The EN guaranteed values are valid for a thickness from 5 up to
75mm - Mechanical properties are related to the thickness of the plate