Stainless steel

DESIGNATIONS

GROUP Grade European Designation USA AISI
Name No
Basic Austenitics 17-7 C X10CrNi18-8 1.4310 301
18-9 E X5CrNi18-10 1.4301 304
18-11 ML X2CrNiMo17-12-2 1.4404 316L
Austenitics with higher resistance to intergranular corrosion 18-9 EL X2CrNi19-11 1.4306 304L
18-10 T X6CrNiTi18-10 1.4541 321
17-11 MT X6CrNiMoTi17-12-2 1.4571 316Ti
18-13 MS X2CrNiMo18-14-3 1.4435 316L
Austenitics for deep drawing 18-9 D X5CrNi18-10 1.4301 304
Creep resistant Austenitics R24-13 S X12CrNi23-13 1.4833 309S
R25-20 X8CrNi25-21 1.4845 310S
Basic Ferritics F 12 T X2CrTi12 1.4512 409
F 17 X6Cr17 1.4016 430
F 17 T X3CrTi17 1.4510 430Ti
Special Ferritics F 17 M X6CrMo17-1 1.4113 434

PROPERTIES

GROUP USA AISI PROPERTIES
Cold formability Weldability Resistance to irregular corrosion Resistance to hot oxidation Mechanical strength
Basic Austenitics 301 ■■ ■■ ■■■ ■ ■■■■
304 ■■■■ ■■■ ■■ ■■ ■■■
316L ■■■■ ■■■■ ■■■■■ ■■■■ ■■■
Austenitics with higher resistance to intergranular corrosion 304L ■■■■■ ■■■■■ ■■■■■ ■■ ■■
321 ■■■■ ■■■■ ■■■■■ ■■■ ■■
316Ti ■■■ ■■■ ■■■■■ ■■■ ■■■
316L ■■■■ ■■■ ■■■■■ ■■■■ ■■■
Austenitics for deep drawing 304 ■■■■ ■■■■ ■■ ■ ■■■
Creep resistant Austenitics 309S ■■ ■■■■ ■■■ ■■■■ ■■■■
310S ■■ ■■■■ ■■■ ■■■■ ■■■■
Basic Ferritics 409 ■■■ ■■■ ■■■■ ■■■ ■■
430 ■■ ■■ ■ ■■■ ■■■
430Ti ■■■ ■■■ ■■■■ ■■■ ■■
Special Ferritics 434 ■■ ■■ ■ ■■ ■■

■ Low       ■■ Medium          ■■■ Good       ■■■■ Very good         ■■■■■ Excellent            

CHEMICAL COMPOSITION

GROUP USA AISI Chemical Composition (indicative)
C Si Mn Cr Mo Ni Other Variants
Basic Austenitics 301 0.10 0.60 1.00 17 7.20
304 0.05 0.50 1.10 18.20 8.30
316L <0.03 0.50 1.50 17 2.10 10.30
Austenitics with higher resistance to intergranular corrosion 304L <0.02 0.50 1.10 18.50 10 N<0.02
321 0.03 0.50 1.30 17.50 9.20 Ti=0.30 Ti>5 (C+N)
316Ti 0.04 0.50 1.50 17 2.10 10.70 Ti=0.35
316L <0.03 0.50 17.80 2.60 12.70
Austenitics for deep drawing 304 0.04 0.50 1.50 18.20 8.70
Creep resistant Austenitics 309S 0.06 0.35 1.50 22.50 13.50
310S 0.05 0.50 1.70 25 19.80
Basic Ferritics 409 0.02 0.50 0.30 11.50 Ti=0.18
430 0.05 0.35 0.40 16.50 F18 (Cr≥18.5)
430Ti 0.02 0.35 0.40 16.50 Ti=0.40
Special Ferritics 434 0.05 0.35 0.40 16.50 1 F17MS (Mo=1.25)

MECHANICAL CHARACTERISTICS

GROUP USA AISI ANNEALED (Indicative)
Rm (N/mm2) Rp0.2(N/mm2) A% HB ou HV
Basic Austenitics 301 670 300 48 215
304 670 320 50 160
316L 600 310 48 180
Austenitics with higher resistance to intergranular corrosion 304L 580 240 50 140
321 610 280 48 180
316Ti 610 310 47 190
316L 610 310 45 200
Austenitics for deep drawing 304 630 300 54 160
Creep resistant Austenitics 309S 630 330 45 220
310S 600 300 42 220
Basic Ferritics 409 410 250 32 130
430 500 340 26 160
430Ti 450 300 30 140
Special Ferritics 434 540 370 27 160
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