Material No.: 1.4742

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

Description

EN symbol (short)X10CrAlSi18
AISIAISI 442
UNSS 44200
AFNORX10CrAlSi18 (NF EN 10095/03/1999)(FR)
BSX10CrAlSi18 (B.S EN 10095/03/1999)(GB)
Density kg/dm37,7
Hardness HB 30max.212
Compositionchrome steel with AL addition
CategoryHeat resistant steels and alloys
Structureferritic
Additional characteristicsresistant to carbonisation
good resistance to oxidising sulfur-containing gas
forge scale temperature 1832°F
No translation!

Chemical Composition

 CSiMnSCrAlP
1.4742Min % 0,70  17,000,70 
Max %0,121,401,000,01519,001,200,04
(Key to steel 2010)
AISI 442Min %       
Max %       
S 44200Min %0,15      
Max % 1,001,00 0,30 0,40
UNS 4200/ AISI 420

Physical properties

PropertyValue
Density: kg/dm37,7
Hardness: HB 30max.212
Permeabilität bei 20°C---
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/ 68500/16/ --   
100/ 212 17,2 /--   
200/ 392 18,6 /--  10,5/--
300/ 572 20 /--   
400/ 752 21,2 /--  11,5/--
500/ 932 22,3 /--   
600/ 1112 23,3 /--  12,0/--
800/ 1472 25,5 7--  12,5/--
1000/ 1832 28,3 /  13,5/--
Temp.Creep strain limitCreep strain limitCreep rupture strengthCreep rupture strengthCreep rupture strength
50080    
700     
900     

Mechanical properties (20°C / 68°F)

tensile elastic limit(Rp0,2) MPa/ksi>=270/>=39,1
Tensile strenght Rm MPa (ksi)500-700/72,5-101,5
Elongation A%%>= 15%

Temparature information

Application area
Operation temperature ºF  to 1562 ºF on air
soft annealing
Working temperature1472 ºF  to 1580 ºF 
Solution heat treatment
Working temperature1382 ºF  to 2012 ºF 

Standards / information

StandardsDesciption
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
SEW 310 (08/1992)physical properties of steel
SEW 470 (02/1976)heat-resisting rolled and forged steels

Process information

Cold formingMind cold work hardening (read special instructions)
Chip removing processworkable like low-carbon steel
Welding
 - TypeWIG
MAG solid wire
manual arc welding (E)
 - Add. material1.4829
1.4820;1.4829
1.4820;1.482
 - Hintsmaterial is heat-sensitive , requires low heat input

Main fields of application

Details of application
Certificationsonly for components under moderate mechanical strain
industral furnace engineeringfurnace parts
annealing tubes
annealing hood
Chemical Industry

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 endsflared tube end
collars
various flanges (weld neck flange,blind flange etc.)
weld neck flange/blind flange
Pipes / Tubeswelded pipes/tubes
seamless pipes/tubes
Bar steelflat steel
round 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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