Material No.: 2.4856

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

Description

EN symbol (short)NiCr22Mo9Nb
Alloy 625
UNSN 06625
AFNORNC 22DNb
Registered work's labelInconel® 625
Density lb/in.30,303
Hardness HB<=240)
CompositionNickel Chrome Molybdenum alloy
CategoryHeat resistant steels and alloys
Structure
Corrosionresistant to intercrystalline corrosion
against crevice corrosion
good resistance to tensile corrosion
high resistance to corrosion in oxidising and chloric substances
Additional characteristicsgood mechanical properties from low to high temperature ranges
excellent resistance against chloride acidic substances
Descriptionexcellent resistance against corrosion in various corrosive substances (phosphoric/nitric/sulfuric/hydrochloric acid)
also resistant to chloride induced tensile corrosion
resistant against alkalics and organic acids
excellent resistance against fissures, crevice/intercrystalline corrosion

Chemical Composition

 CSiMnPSCrMoNiCuNbTiFeCoAlCb+Ta
2.4856Min %     20,008,0058,00 3,15     
Max %0,100,500,500,020,01523,0010,00 0,504,150,405,001.000,40 
(Key to Steel 2010)
alloy 625
N 06625		Min %     20,008,0058,00      3,15
Max %0,100,500,500,0150,01523,0010,00.  0,405,00 0,404,15
ASTM B704

Physical properties

PropertyValue
Density: lb/in.30,303
Hardness: HB<=240)
Permeability at 20°C/68°F1,003
magnetizabeparamagnetic
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 / 68
(93 / 200)		415 (0,099)
((0,103)		9,8 (68)
(77)		128 (770)
(782)		209 (30,3)
(29,4)
(7,0)
200 /392
(204 / 400)		460
(0,110)		12,8
(90)		132
(794)		195
(28,3)		13,1
(7,7)
400 / 752
(427 / 800)		505
(0,122)		16,3
(0,115)		135
(815)		185
(26,5)		13,7
(7,6)
600 /1112
(649 / 1200)		550
(0,134)		19,3
(139)		136
(820)		170
(24,1)		14,6
(8,3)
800 /1472
(871 / 1600)		600
(0,147)		22,6
(167)		136
(815)		153
(21,0)		15,8
(9,0)
1000 /183265026,713212817,0

Mechanical properties (20°C / 68°F)

Density (lb/in.3)0,303
Yield strength Rp0,2 (ksi)60-50
Tensile strength MPa bei RT820 -1050
Elongation A5 (68°F) (%)>=30
Impact energy ISO-V (J/cm2)>= 125
average at room temperature (J/cm2) 
Remarks 

Temparature information

Application area
Operation temperature ºF  to 1832 ºF 
Explanation reportmax. in air
Soft annealing
Working temperature1742 ºF  to 1922 ºF 
Processing informations???
Solution heat treatment
Working temperature2102 ºF  to 1652 ºF 
Explanation reportquick water or air cooling

Standards / information

StandardsDesciption
ASTM B 443standard specification for nickel-Chromium-Molybdenum-Columbium Alloys (UNS N06625) Plate,Sheet, and Srip
ASTM B 444standard specification for Nickel-Chromium-Molybdenum-Columbium Alloys (UNS 06625) Pipe and Tube
ASTM B 564-06Standard Specification for Nickel Alloy Forging
ASTM B 704Standard Specification for Welded Alloy Tubes
ASTM B 705Standard Specification for Nickel-Alloy Welded Pipe
DIN 17744 (2002/09)nickel-forgeable alloy with molybdenum and chrome
DIN 17750 (2002/09)ribbons and sheet metal out of nickel with nickel-wrought alloy properties
DIN 17751 (2002/09)tubes out of nickel with nickel-wrought alloy properties
DIN 17752 (2002/09)rod made from nickel with nickel-wrought alloy properties
DIN 17753 (2002/09)wire out of nickel with nickel-wrought alloy properties
DIN EN 10088-1 (09/2005)Stainless steels Part 1: List of stainless steels
DIN EN 10095 (05/1999)heat resistant steel and nickel alloy
VdTÜV / Werkstoffblatt 499extremely corrosion resistant nickel based alloy, NiCr22Mo9Nb, material-nr. 2.4856 ribbon, sheet metal, section steel, seamless pipe, forging

Process information

Cold formingmaterial in annealed state, mind cold-work hardening
modifications >10% require subsequent soft annealing
Chip removing processpreferably in annealed state, due to a tendency to cold-work hardening
low cutting speed and sufficient rate of cut
Welding
 - Material classification acc. CEN ISO/TR 1560843
 - Typewell weldable
WIG
plasma welding
manual arc welding
MIG/MAG
submerged arc welding
 - Add. material2.4621;2.4831

Main fields of application

Details of applicationfor high-temperature application (1000°C/1832°F) solution annealed/higher carbon, otherwise annealed/lower carbon.
Certificationspressure containers according to TÜV -196 - +450°C/-320 - +843°F
in NACE MR O175 included
Chemical IndustrySuperphosphoranlagen; Abfackelrohre (lösungsgeglühte Variante)
Flue gas desulphurisation plantsflue gas scrubbers
waste incineration plantsKesselrohre (lösungsgeglühte Variante)
Apparatus engineeringpressure tanks
Environmental technologysewage works
offshore plantsSea water desalination plant
NasskorrosionshinweiseSchwefesäure sehr gut ( x) ;gut( );mässig ( )
NasskorrosionshinweisePhosphorsäure sehr gut ( X) ;gut( );mässig ( )

Range of products

Product typeProduct
Processing / Constructionfrom bar steel (turning, milling)
Plates / Sheetsplates/sheets
plate/sheet cuts
Rotating componentsfittings from barsteel
Fittingswelded elbows
welded reductions
Welded T-pieces
seamless elbows
seamless reductions
seamless T-pieces
Flanges / Collars / Flared tube endsflared tube end
various flanges (weld neck flange,blind flange etc.)
Pipes / Tubeswelded pipes/tubes
welded square pipes/tubes
seamless pipes/tubes
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.
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