Material No.: K 91560

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

Description

EN symbol (short)X10CrMoVNbN9-1
Material No.1.4903
AFNORX10CrMoVNbN9-1 (NF EN 10088-1(06/2005) (Fr)
BSX10CrMoVNbN9-1 (EN 10088-1(06/2005) (GB)
Density kg/dm37,76
Hardness (HB)
CompositionAlloyed stainless steel
CategoryStainless steels
High-temperature steel
Structuremartensitic

Chemical Composition

 CMnPSSiCrMoVNNiCbAlALCuMo Nb
K 91560Min %0,080,30  0,208,000,850,180,030 0,06     
Max %0,120,600,0200,0100,509,501,050,250,0700,040,100,04    
K 91560 (ASTM A335/213 -P91/T91
1.4903Min %0,080,30   8,0 0,180,030     0,850,060
Max %0,120,600,0200,0050,509,50 0,250,0700,30  0,0400,301,050,100
(Key to steel 2010)

Physical properties

PropertyValue
Density: kg/dm37,76
Hardness: (HB)---
magnetizableyes
E-Modul (Mpa)218000
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 / 68460 (--)26 (--) 218 (--) 
200 / 392   207 (--)11,3 (--)
400 / 752   190 (--)12,0 (--)
500 / 932 30 (--)  12,3 (--)
600 / 1112    12,6 (--)
650 / 1202   162 (--)12,7 (--)
Temp.Creep strain limitCreep strain limitCreep rupture strengthCreep rupture strengthCreep rupture strength
Rp0,2
10 000h100 000h
°CN/mm2 / ksiN/mm2 /ksiN/mm2 /ksi
20 /68450 / 65    
100 /212410 / 59,4    
300 /572360 / 52,2    
500 / 932300 / 43,5 289 / 41,9258 / 37,4 
550 /1022270 / 39,1 199 / 28,8166 / 24,0 
600 /1112215 / 31,1 122 / 17,694 / 13,6 
650 /1202  70 / 10,149 / 7,1 
ksi value calculated
Temperature
0,2% Yield strength
in high temperatures
°C / °FRp0,2
Mpa / ksi
100 /212410 / 59,4
200 /392380 / 55,1
300 / 572360 / 52,2
400 / 752340 / 49,3
500 /932300 / 43,5
600 /1112215 / 31,1

Mechanical properties (20°C / 68°F)

0,2% Yield strength Rp0,2 (N/mm2)>=450normalised and tempered
Yield strength Mpa/ksi415 /60ASTM A 335 -P91
Tensile strength Rm(N/mm2)620-850normalised and tempered
Elongation-A5 (%)min.längs>=20normalised and tempered
impact strength (J) (transverse)
40normalised and tempered
Tensile strength Rm N/mm2 7ksi585 / 85ASTM A 335 -P91

Temparature information

Application area
Operation temperature14 ºF  to 1202 ºF wall temperature during continuous duty
hardening
Working temperature1904 ºF  to 2012 ºF 
Explanation reportoil
Processing informationsDIN EN 10028-2(09/2009) to follow
Solution heat treatment
Working temperature2012 ºF  to 2102 ºF 
Explanation reportslow cooling-down / air
Processing informationsup hot forming -heat treatment
Normalizing
Working temperature1904 ºF  to 2012 ºF 
Tempering
Working temperature1346 ºF  to 1436 ºF 
Explanation report<= 1h

Standards / information

StandardsDesciption

Process information

Welding
 - Material classification acc. CEN ISO/TR 156086.4
 - TypeWIG
submerged arc welding
manual arc welding (E)
MAG solid wire
MAG cored wire
 - Add. materialCrMo 910
UV 420 TTR
...........
CrMo 910
CrMo-M21

Main fields of application

Details of application
Certifications
Power plantsDruckbehälter
Dampfkesselbau
Rohre
Chemical Industry
petrochemical industry

Range of products

Product typeProduct
Processing / Constructionfrom pipes, fittings, flanges (welded)
from bar steel (turning, milling)
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.)
Bumped boiler ends / caps / round blanksfrom sheets
from bar steel
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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