Material No.: 1.4749

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

Description

EN symbol (short)X18CrN28
AISIAISI 446-1
UNSS 44600
AFNORZ 10 C 24
Density kg/dm37,7
Hardness HB 30212
CompositionChrome steel with Nb addition
CategoryHeat resistant steels and alloys
Structureferritic
Additional characteristicsresistant to oxidising sulfuric gas
forge scale temperature 2012 °F

Chemical Composition

 CSiMnPSCrNNi
1.4749Min %     26,000,15 
Max %0,201,001,000,040,01529,000,25 
(Key to steel 2010)
AISI 446-1
S 44600		Min %     23,00  
Max %0,201,001,500,0400,03027,000,250,75
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
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 10095 (05/1999)heat resistant steel and nickel alloy
DIN EN 10297-2 (02/2006)Welded circular steel pipes for machine construction and general technical service stainless steel. Pipes made from stainless steel
DIN EN 10297-2 (02/2006)seamless circular steel pipes for machine construction and general technical applications, stainless steel

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
Environmental technologywaste-to-energy plants
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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