Stainless Steels

Stainless designationStandard designationsInternational StandardsFormDescription
Martensitic grades
ST 4028AISI 420 B
S 42000
1.4028, X30Cr13
ASTM F 899
NFS 94090
BarHigh strength alloy with moderate corrosion resistance
ST 80
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AISI 431, APX
1.4057
X17CrNi16.2
ASTM F 899
NFS 94090, AIR 9160
NFEN 10 088-3
BarExcellent combination of strength and corrosion resistance
APX 4(1)
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1.4418
X4CrNiMo16.5.1
NFS 94090, AIR 9160
NFEN 10088-3
BarSame as above, with better corrosion resistance
X15TN(1)
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AISI 420 MOD
1.4123
X40CrMoVN16.2
ASTM F 899, NFS 94090BarOutstanding corrosion resistance combined with very high hardness
Austenitic grades
STAINLESS TAISI 301, 1.4310
X10CrNi18.8
AMS 5517, 5518
AMS 5519
StripStainless steel with high strength produced by cold work
STAINLESS JAISI 304, 1.4301
X5CrNi18.10
AMS 5513StripSuperior corrosion resistance to AISI 301
PLATINO STAINLESS BCAISI 304 L, S 30403
1.4306
X2CrNi19.11
AMS 5511, NFL 23320Strip
Bar
Wire
Similar to AISI 304 with better intergranular corrosion resistance
309AISI 309
UNS S 30900
1.4828
X15CrNiSi20.12
 StripGood corrosion resistance, poor weldability
310AISI 310
UNS S 31000
1.4845
X15CrNiSi25.20
 StripGood high temperature properties
PLATINO STAINLESS MBCAISI 316 L
S 31603
1.4404
X2CrNiMo17.12.2
AMS 5507Strip
Bar
Similar to AISI 316 but with better intergranular corrosion resistance
ST4441VMAISI 316L
X2CrNiMo18.14.3
ASTM F138, F139
ISO 5832-1
BarsVacuum-melted and remelted 316L alloy, biocompatible
M25W(1)AISI 316 L
X2CrNiMo18.14.3
ASTM F 138, F 139
ISO 5832-1
BarHigh purity remelted 316 L alloy, biocompatible
M30NW(1)
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X4CrNiMnMoN21.9.4ASTM F 1586
ISO 5832-9
BarNitrogen-containing remelted alloy, with increased strength and corrosion resistance, biocompatible
317 LAISI 317 L
S 31703, 1.4435
X2CrNiMo18.14.3
 StripHigh strength at high temperatures combined with high creep strength and outstanding chemical corrosion resistance
STAINLESS TPAISI 321, S 32100
1.4541
X6CrNiTi18.10
AMS 5510StripGood weldability and high mechanical properties at temperatures up to 700-800°C (1300-1470°F)
347AISI 347
UNS S 34700
1.4550
X6CrNiNb18.10
AMS 5512StripGood corrosion resistance, suitable for welding
Precipitation hardening grades
17-7 PH(2)1.4568
X7CrNiAl17.7
UNS S 17700
AMS 5528, ASTM A693StripGood combination of mechanical properties, corrosion resistance and fatigue strength. Simple manufacturing process
15.7 Mo(2)1.4532
UNS S 15700
X8CrNiMoAl15.7.2
 StripGood corrosion resistance, high hardness after ageing
17.4 PH1.4542
UNS S 17400
X5CrNiCuNb16.4
AMS 5604StripGood corrosion resistance, high hardness after ageing
ST 4542AISI 630
1.4542
X5CrNiCuNb16.4
ASTM F 899, NFS 94090BarSame as above, suitable for medical applications
MX 455(1)
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AISI XM 16
1.4543
X2CrNiCuTiNb12.9
ASTM F 899, NFS 94090BarGood combination of strength, toughness and corrosion resistance
MX 466(1)
(formerly MLX17)
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X1CrNiMoAlTi 12-11-2ASTM F 899, AMS 5937BarOutstanding combination of strength, toughness and fatigue strength
A286AISI 660
UNS S 66286
1.4943
X5NiCrTi26.15
 StripOxidation and corrosion resistant up to 700°C (1300°F)
AM 350(3)UNS S 35000AMS 5546, 5548
ASTM A 693
StripHigh strength combined with excellent weldability and good corrosion resistance

(1) Trademark Aubert & Duval
(2) Trademark Armco Inc.
(3) Trademark Allegheny Ludlum

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