Material No.: AISI 318 LN

DescriptionChemical
composition		Physical
mechanical
properties		Temparature
information		StandardsProcess
information		Application
Certification		ProductsAll

Description

EN symbol (short)X2CrNiMoN22-5-3
Material No.1.4462
UNSS 31803
Grade TP 316 LN
AFNORZ2 CND 22.05 Az
BS318 S 13
Registered work's label*Cronifer® 2205 LCN
Density kg/dm37,8
Hardness HB 30<=270
CompositionNo translation!
CategoryCorrosion resisting steels and alloys
Structureferritic
austenitic
No translation!
Corrosionstainless
chemically resistant
Additional characteristicsNo translation!
DescriptionThis material shows high resistance to pitting corrosion and intercrystalline corrosion additionally to great firmness.
However it also has a tendency to 840°F embrittlement.

Chemical Composition

 CMnPSCrMoSiNiN
AISI 318 LNMin %    21,002,50 4,500,08
Max %0,0302,000,0300,02023,003,501,006,500,02
ASTM A790 (S 31803)
1.4462Min %    21,002,50 4,500,100
Max %0,0302,000,0350,01523,003,501,006,500,220
(Key to steel 2010)
S 31803Min %    21,002,50 4,500,08
Max %0,0302,000,0300,02023,003,501,006,500,20
ASTM A 790 (S 31803)

Physical properties

PropertyValue
Density: kg/dm37,8
Hardness: HB 30<=270
Permeabilität bei 20°C290 (S 31803-ASTM A 790)
30,5 (S 31803-ASTM A 790)
magnetizableyes
polishableyes
Temperature T
°C/F
(°C/F)		Specific heat
J / kgK
(Btu / lb °F)		Thermal conductivity
W/mK
(Btu·in / ft2·h·°F)		Electric resistance
µΩ · cm
(Ω circ mill / ft)		Modulus of elasticity
kN/mm2
(103 ksi)		Expansion rate from 70°F bis T
10-6 / K
(10-6 / °F)
20450170,7720013,0 (-)
100   194 (-)13,5
200   186 (-)14,2
300   180 (-)14,6
Temperature1,0% Yield strength

in high temperatures		0,2% Yield strength

in high temperatures
°C / °FRp 1,0Rp 0,2
N/mm2 / ksiN /mm2 /ksi
100 / 212410 / 59,4360 / 52,2
200 / 392350 / 50,7310 / 44,9
250 / 482335 / 48,6295 /42,8
300 /572320 / 46,4280 /40,6

Mechanical properties (20°C / 68°F)

Dehngrenze450 / 65,2
Dehngrenze500 / 72,5
65 /(450)
(S 31803-ASTM A 790)
Zugfestigkeit680-880 /98,0-127
90 /(620)		cold strip 660/950
(S 31803-ASTM A 790)
Bruchdehnung25
25
in 2 in.or 50mm
(S 31803-ASTM A 790)
Schlagarbeit ISO-V100
(Mittelwert von 3 Proben) 

Temparature information

Application area
Operation temperature14 ºF  to 536 ºF 475 ° (sigma phase embrittlement)
Solution heat treatment
Working temperature1832 ºF  to 2048 ºF 
Processing informationscool down:water; air; blanket gas
Solution heat treatment
Working temperature2102 ºF  to 1562 ºF 
Processing informationscool down:air
hardness
Working temperature1868 ºF  to 2012 ºF 
Processing informationsair / water

Standards / information

StandardsDesciption
DIN EN 10296-2 (02/2006)welded circular steel pipes for machine construction and general technical applications, stainless steel
SEW 400 (1997-02)Rolled and forged stainless steels
VdTÜV / Werkstoffblatt 418ferritic austenic rolled / forged steel, X2CrNiMoN 22-5-3, material-nr. 1.4462

Process information

Cold formingheat treatment not necessary if degree of deformation <10%
Chip removing processdoesn't tend to smear
Welding
 - Material classification acc. CEN ISO/TR 1560810,1
 - Typewell weldable
Laser welding
No translation!
 - Add. material1.4462
 - HintsNo translation!

Main fields of application

Details of applicationfor use in: high temperature chloride contaminated water; sea water; brakish water: deteriorating solid matters; sour gas
-Petrochemistry; ocean engineering
-polishable
Certificationshardness conforms to NACE MR0175
Chemical Industry
Apparatus engineering
cellulose/paper industry
offshore plantsMeerwasserentsalzungsanlagen
Environmental technologyKläranlagen
food processing industry
crude oil

Range of products

Product typeProduct
Processing / Constructionfrom sheets
from pipes, fittings, flanges (welded)
from bar steel (turning, milling)
Plates / Sheetsplates/sheets
plate/sheet cuts
FittingsWelded T-pieces
seamless elbows
seamless reductions
seamless T-pieces
Other Fittings a.o. Weldolets, Nipples
Flanges / Collars / Flared tube endsflared tube end
collars
various flanges (weld neck flange,blind flange etc.)
weld neck flange/blind flange
Bumped boiler ends / caps / round blanksfrom sheets
from bar steel
Pipes / Tubeswelded pipes/tubes
welded square pipes/tubes
Hollow bar
seamless pipes/tubes
Round barrolled
forged raw
Bar steelflat steel
section steel

Liability exclusion

All aforementioned specifications serve as a general orientation and have to be reviewed depending on the conditions of use.
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