Material No.: AISI 446-1

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

Description

EN symbol (short)X18CrN28
Material No.1.4749
UNSS 44600
AFNORZ 10 C 24
Density kg/dm37,7
Hardness HB 30212
CompositionNo translation!
CategoryHeat resistant steels and alloys
Structureferritic
CorrosionNo translation!
Additional characteristicsresistant to oxidising sulfuric gas
forge scale temperature 2012 °F

Chemical Composition

 CMnPSSiNiCrN
AISI 446-1Min %      23,00 
Max %0,201,500,0400,0301,000,7527,000,25
???
1.4749Min %      26,000,15
Max %0,201,000,040,0151,00 29,000,25
(Key to steel 2010)
S 44600Min %      23,00 
Max %0,201,500,0400,0301,000,7527,000,25
ASTM A268 (UNS S44600)

Physical properties

PropertyValue
Density: kg/dm37,7
Hardness: HB 30212
magnetizableYes
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 / 680,5 (--)17,0 (--)  10,0 (--)
400 / 752    11,0 (--)
600 1112    11,5 (--)
800 /1472    12,9 (--)
1000 /1832    13,0 (--)
Temp.Creep strain limitCreep strain limitCreep rupture strengthCreep rupture strengthCreep rupture strength
(Rp1,0)
MPa/ksi
(Rp1,0)
MPa/ksi

MPa /ksi

MPa/ksi
°C/°F1000 h10 000h10 000h100 000h
600 / 111227,5 /4,017,5 / 2,535 / 5,0720 / 2,9 
700 / 12928,5 / 1,24,7 / 0,689,5 / 1,375,0 /0,7 
800 / 14723,7 /0,52,1 /0,34,8 / 0,702,3 / 0,33 
900 / 16521,8 / 0,261,0 / 0,141,9 /0,271,0 / 0,14 
ksi value calculated

Mechanical properties (20°C / 68°F)

0,2%Yield strength 
0,2% tensile elastic limit (Rp)Ma/ ksi> =280;> =40
Tensile strenght Rm (MPa) (ksi)500-700/72,5-101,5
Elongation (A5)>=15%

Temparature information

Application area
Operation temperature ºF  to 2012 ºF in air/scaling resistance
soft-annealed
Working temperature1472 ºF  to 1580 ºF 
Explanation reportcooling in still air
Solution heat treatment
Working temperature1472 ºF  to 2102 ºF air/Water
annealing
Working temperature1382 ºF  to 1652 ºF afterwards: Ferrit

Standards / information

StandardsDesciption

Process information

Welding
 - Typewell weldable
manual arc welding
manual arc welding (E)
 - Add. material1.4541(austenitic)
1.4716 (ferritic)
 - Hintsavoid gas welding

Main fields of application

Details of applicationperforms well under oxidising and sulfidising conditions
Certifications
waste incineration plantsMüllverbrennunsanlagen
industral furnace engineering

Range of products

Product typeProduct
Plates / Sheetsplates/sheets
plate/sheet cuts
Fittingswelded elbows
welded reductions
Welded T-pieces
seamless elbows
seamless reductions
seamless T-pieces
Other Fittings a.o. Weldolets, Nipples
Flanges / Collars / Flared tube endsvarious flanges (weld neck flange,blind flange etc.)
Pipes / Tubeswelded pipes/tubes
seamless pipes/tubes
Bar steelround bar 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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