Material No.: 1.4539

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

Description

EN symbol (short)X1NiCrMoCu 25 20 5
Alloy 904 L
UNSN 08904
AFNORX1NiCrMoCu 25 20 5 / NF EN 10088-1 ( 06/2005) (FR)
BSX1NiCrMoCu 25 20 5 /BS EN 10088-1 ( 06/2005) (GB)
Density kg/dm38,05
Hardness HB<= 230
CompositionNickel Chrome Molybdenum steel
CategoryCorrosion resisting steels and alloys
Structureaustenitic
Corrosionresistant to intercrystalline corrosion
high resistance to pitting corrosion, tensile corrosion, crevice corrosion
Additional characteristicschemically resistant
DescriptionUsually used in highly corrosive substances.

Chemical Composition

 CMnPSCrMoSiNiCuNFe
1.4539Min %    19,004,00 24,001,20  
Max %0,022,000,0300,01021,005,000,7026,002,000,150 
(Key to steel 2010)
alloy 904 L
N 08904		Min %    19,004,00 23,001,00 balance
Max %0,022,00,0450,03523,005,001,0028,002,00 balance
ASTM B 677 (UNS 08904 )

Physical properties

PropertyValue
Density: kg/dm38,05
Hardness: HB<= 230
Rockwell Hardness Number max.B 90 (N 08904-ASTM A 249)
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)
20 / 68450 / (-)12 / (-)1,0 /(-)195 (-) 
100 / 212   190 (-)15,8 / (-)
200 /392   182 (-)16,1 / (-)
300 / 572   174 (-)16,5 / (-)
400 / 752   166 (-)16,9 / (-)
500 / 932   158 (-)17,3 / (-)
Temperature0,2% Yield strength in high temperatures1,0% Yield strength in high temperatures
°C /°FRp 0,2Rp 1,0
N/mm2 / ksiN/mm2 /ksi
100 / 212205 / 29,73235 /34,00
200 / 392175 / 25,38205 / 29,73
300 / 572145 /21,00175 / 25,38
400 / 752125 / 18,10165 / 23,93
500 / 932110 / 15,95140 / 20,30
ksi value calculated

Mechanical properties (20°C / 68°F)


Yield strength 0,2% offset min.N/mm2 / (ksi)

220 /31		(solution annealed)

(solution annealed)

(N 08904-ASTM A 249)
Tensile strength min (N/mm2) (ksi )
Tensile strength min.ksi (Mpa)		490 / 71
71 / (490)		(solution annealed)
(solution annealed)
(N 08904-ASTM A 249)
Elongation min.%
Elongation min.%		35
35		(solution annealed
in 2 in.or 50 mm
(solution annealed)
(N 08904-ASTM A 249)
impact work ISO-V (J)60transverse

Temparature information

Application area
Operation temperature ºF  to 662 ºF 
Working temperature1940 ºF  to 2084 ºF 
Explanation reportduration 5 min per 5 mm width
Solution heat treatment
Working temperature2102 ºF  to 1742 ºF 
Explanation reportcool down:air/Water

Standards / information

StandardsDesciption
DIN EN 10216-5 (11/2004+B1) /seamless steel pipes under compression load made from stainless steels
ASTM A 182Standard Specification for Forged or Rolled Alloy-Steel Pipe Flanges,Forged Fittings and Valves and Parts for High-Temperature Service
ASTM A 240sheet metal and ribbons from stainless Cr and Ni pressure containers
ASTM A 249 Standard Specification for Welded austenitic steel boiler, Superheaters, heat-exchangers,and condenser Tubes
ASTM A 276 Rods and cross-sections made of stainless and heat-resistant steel
ASTM A 312 Standard Specification for Seamless and welded austenitic stainless steel pipes
ASTM B 366Standard Specification for Factory-Made Wrought nickel and nickel alloy fittings
ASTM B 673Standard Specification for Welded Pipe
ASTM B 674Standard Specification for Welded Tube
ASTM B 677Standard Specification for UNS N08904,N08925 and N08926 Seamless Pipe and Tube
DIN EN 10028-7 (02/2008)flat products made from steel for pressure tanks Part 7: Stainless steel
DIN EN 10088-1 (09/2005)Stainless steels Part 1: List of stainless steels
DIN EN 10088-3 (09/2005)stainless steels.Technical delivery conditions for semi-finished products,bars,rods,wire selection and bright products of corrosion resisting steels for general and construction purposes
DIN EN 10088-4 (08/2009)stainless steel.Building industry: Technical transport conditions for corrosion resistant sheet metal and ribbons
DIN EN 10217-7 (05/2005)Welded steel tubes under compression load. Stainless steel tubes
VdTÜV / Werkstoffblatt 421Austenitic rolled/forged steel XiCrMoCu 25 20 5 Manufacturer: ribbon, sheet, seamless pipe, profile and rod steel. flanges, forgings

Process information

Chip removing processtendency to cold work hardening
Welding
 - Material classification acc. CEN ISO/TR 156088.2
 - Typewell weldable with all techniques
 - Add. material1.4519;2.4653
 - Hintsinterpass temperature must not go over 302°F
special post heat treating not required

Main fields of application

Details of application
Certificationsapproved for pressure containers VdTüV 421
Chemical Industryfor processing sufuric acid (e.g. sulfuric acid coolers)
for processing phosphoric acid
for the production of salt acid
cellulose/paper industry
Flue gas desulphurisation plants
offshore plantsSea water desalination plant
Fertiliser industry

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 reductions
Welded 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
seamless pipes/tubes
Round barforged raw
Bar steelflat steel
section steel
round bar steel
hexagon steel

Liability exclusion

All aforementioned specifications serve as a general orientation and have to be reviewed depending on the conditions of use.
(c) 2012 M. Woite GmbH, Postbox, D-40671 Erkrath | Phone +49 (211) 24 40 91 - Fax +49 (211) 24 92 28 | www.m-woite.com - woite@woite-edelstahl.com