Material No.: Alloy 800 HT

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

Description

EN symbol (short)X8NiCrAlTi 32-21
Material No.1.4959
UNSN 08811
AFNORX8NiCrAlTi 32-21 / EN 10088-1 (06/2005) (FR)
BSNA 15 H / (3074 (1989) (GB)
Registered work's labelNicrofer® 3220 HP
Density lb/in.37,94
Hardness (HB)
Compositionchromium nickel steel
CategoryHeat resistant steels and alloys
Structureaustenitic
Additional characteristicsresistant against oxidation,nitridation,carbonisation

Chemical Composition

 CSiMnPSAlCoCrCuNNiTiAl+TiFe
Alloy 800 HTMin %              
Max %              
1.4959Min %0,05    0,25 19,00  30,000,25  
Max %0,100,701,500,0150,0100,650,5022,000,500,03034,000,65  
(Key to steel 2010) DIN EN 10216-5 -Al 0,20-0,65%
N 08811Min %0,06    (0,015) 19,0  30,0(0,15)0,8539,5
Max %0,101,001,50 0,015(0,60) 23,00,75 35,080,60)1,20 
ASTM B 407 (N08811-Alloy 800HT)

Physical properties

PropertyValue
Density: lb/in.37,94
Hardness: (HB)---
Permeabilität bei 20°C1,01
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 / 6846811,5101194 
100 / 21250013,110418915,1
300 / 57253216,411217616,2
500 / 93258119,511716417,1
700 / 129261022,812114817,7
800 / 147260724,212514118,0
100 / 183264027,112712618,6
Temp.Creep strain limitCreep strain limitCreep rupture strengthCreep rupture strengthCreep rupture strength
°C/°F100.000 h200.000 h
°C/°FMpa / ksiMpa/ ksi
700 /1292  50 / 7,244 / 6,4 
750 / 1382  31,6 / 4,626,8 / 3,9 
800 / 1472  21,4 / 3,1017,5 / 2,5 
850 / 1562  14,4 / 2,012,1 /1,75 
900 / 1652  9,4 / 1,48,0 / 1,16 
950 / 1742  5,8 / 0,855,0 / 0,72 
1000 / 1832  3,7 / 0,631,0 / 0,15 
pipe (solution annealed)
ksi value calculated
TemperatureYield strength
in high temperatures		Yield strength
in high temperatures
(°C/°F)Rp 0,2Rp 1,0
N/mm2 /ksiN/mm2 /ksi
20 / 68>=170 / >= 24,6>=200 / >= 29,0
100 / 212>=140 / >=20,3>=160 / >=23,2
300 / 572>=95 / >=13,7>=115 / >=16,6
400 / 752>=85 / >=12,3>=105 / >=15,2
500 / 932>=80 / >=11,6>=100 / >=14,5
ksi value calculated

Mechanical properties (20°C / 68°F)

Dehngrenze500-750 (72,5-108,7)<= 50mm
Dehngrenze 
Zugfestigkeit 
Bruchdehnung35/30lengthwise/tranverse
Schlagarbeit ISO-V>= 120 / >=80lengthwise/tranverse <= 50mm
(Mittelwert von 3 Proben) 

Temparature information

Application area
Operation temperature1292 ºF  to 1832 ºF 
Explanation reporthigh creep resistance in temperature ranges from 1292°F-1832°F
not fit for continous duty below 1292°F
Solution heat treatment
Working temperature2102 ºF  to 2192 ºF 
Solution heat treatment
Working temperature2192 ºF  to 1652 ºF cooldown: water (has to happen quickly between 1400°F- 1004°F)
Explanation reportcooldown: air / water

Standards / information

StandardsDesciption
ASTM B 163Standard Specifications for seamless nickel and nickel alloy condensers and heat-exchanger tubes
ASTM B 407Standard Specification for Nickel-Iron-Chromium Alloy Seamless Pipe and Tube
ASTM B 408Standard Specification for Nickel-Iron-Chromium Alloy Rod and Bar
DIN EN 10028-7 (02/2008)flat products made from steel for pressure tanks Part 7: Stainless steel

Process information

Cold forming-cold work hardening higher than non-austenitic/stainless steels
-process in annealed state
Chip removing processmind cold work hardening when in annealed state
Welding
 - Typecovered electrode
 - Add. materialadditional steels: 2.4648,2.4621

Main fields of application

Details of applicationnot fit for continous duty below 1292°F
Certifications
Power plantslösungsgeglüht bei 1150-1200°C
Chemical Industry
petrochemical industry
industral furnace engineering

Range of products

Product typeProduct
Processing / Constructionfrom sheets
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
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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