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Alloy 800H / 1.4876

Alloy 800H is an austenitic, heat resistant nickel-iron-chromium solid solution alloy with controlled levels of carbon, aluminum, titanium, silicon and manganese and controlled content of (Al + Ti).

Material Data Sheet

Werkstoffnummer 1.4876 / 1.4958
Alloy Alloy 800h
EN material name X10NiCrAlTi32-20
UNS N 08810
ASTM ASME ASTM B409
  ASME SB409
  ASTM A240
  ASME SA240
ISO FeNi32Cr21AlTi-HC
VdTÜV Data Sheet 412, 434

Main fields of application of alloy 800H

Heat exchanger pipes at high temperatures quench systems High temperature areas in power plants Refineries ( E.g. flares) Laboratory Equipment Furnace construction

Chemical composition of alloy 800H

C Si Mn P S Cr
≤ % ≤ % ≤ % ≤ % ≤ % %
0.01 0,1 0,50 0,025 0,015 22,0-24,0
Ni Al Cu Al+Ti Fe
% % ≤ % ≤ % ≤ %
30.0-32.0 0.2-0.4 0,50 max 0.7 rest

Comparison of the different Alloy 800 grades

Alloy 800 800L 800 800H 800ht/hp
Werkstoffnummer 1.4558 1.4876 1.4876/ 1.4958 1.4959
UNS Number N08880 N08880 N08810 N08811
Operating Temperature [C°]: <550 <600 600-950 700-1000
Advantages Corrosion resisting Corrosion and heat resisting Heat resisting, resistant to oxidation, carburization, nitration Heat resisting, resistant to oxidation, carburization, nitration
Heat treatment Soft annealed (920-980°C) Soft annealed (920-980°C) Solution annealed (1150°C) Solution annealed(1150-1200°C)
Al+Ti content [%] <=1,0 <=1,0 <=0,7 0,85-1,2
C content <0,025 0,04-0,08 0,06-0,08 0,06-0,10
Ductility very good good good less good
VdTÜV   412 412/434 412
DIN     17459/17460  
SEW 310/ 400 310/ 470 310 310
Comment   Recommended for temperatures below 600°C Stocked at Hempel, also useable for <700°C Below 700 °C (1290 °F), gamma prime (γ´) precipitates combined with loss of ductility.

Characteristics

  • Good creep resistance at temperatures above 600 ° C.
    To avoid a weakening in strength between 500 and 700 ° C the content of Al + Ti is limited to max.0.7%
  • Good resistance to oxidizing, reducing and nitriding atmospheres and at varying oxidizing and carburizing conditions
  • Metallurgical stability in long-term use at high temperatures


Caution: If temperature 500-700 ° C is passed often during the process, 800h should be preferred. Alloy 800HT may show detrimental phases.

Hot forming

The material is hot formed within a temperature range of 900 and 1200 ° C and afterwards quenched rapidly in water or air. Hot bending is carried out at 1000 to 1150 ° C.
The annealing takes place at 1200 ° C.
Holding time about 60 min. / 100 mm thickness.
After hot forming, heat treatment for optimum creep strength is recommended.

Cold forming

The material has a higher work-hardening rate than austenitic stainless steels. The workpiece should be available in the annealed condition. For strong cold forming intermediate annealing is necessary.
For more than 10% deformation, annealing should be performed.

Heat treatment

The solution annealing is carried out at 1150 ° C. It should be cooled quickly under water.
With thicknesses less than about 1.5 mm rapid air cooling can be done.

Mechanical properties of 1.4876 / 1.4958

The following properties at room and elevated temperatures are in annealed condition and in accordance with the VdTÜV-Blatt. Varying values may be found in literature (e.g. VdTÜV sheet).
At RT
Yield: 170N/mm²
Tensile: 450-700N/mm²
Creep rupture strength of 100.000h value (included VdTÜV safty value 1,5)

    800h         800ht/hp    
According to   VdTÜV 412 VdTÜV 412 VdTüv 434 VdTüv 434 ASME UNS N08810 ASME UNS N08810 ASME UNS N08811 ASME UNS N08811
(Al+ti)%   <=0,7 or 1,0 <=0,7 or 1,0 <=0,7 <=0,7 <=1,0 <=1,0 <=1,2 <=1,2
t°C T°F N/mm² ksi N/mm² ksi N/mm² ksi N/mm² ksi
593 1100   11,5   11,5 80 11.5 89 13
600 1112 76 11 76 11 76   84  
648 1200   7   7,5   7.5   8.5
650 1202 49 7 51 7.5 50   56  
700 1292 31 4.5 35 5 33   38  
704 1300   4.5   5 32 5 37 5.5
750 1382 20 3 24 3.5 22   24  
760 1400   2.5   3   3   3.5
800 1472 13 1.8 16 2.2 15   17  
815 1500   1.5   2 13 1.9 15.2 2.2
850 1562 7 1 10 1.6 10   11.7  
871 1600   0.7   1.3 8 1.2 10 1.5
898 1650   0.4   1 7 1 7.5 1.1
900 1652 2,7 0.4 7 1 7   7.5  
926 1700       0.8 5 0.7    
950 1742     5 0.7 4.5      
953 1750       0,6 4.5 0.6    
981 1800       0,5 3.5 0.5    
1000 1832                

For exact values, we recommend the VdTÜV Blatt

Filler metal (for welding with alloy 800H)

The following fillers are recommended:

 

FM 82

Werkstoff-Nr. 2.4806

SG/UP-NiCr20Nb

AWS A5.14 ERNiCr-3

 

Covered electrode

Werkstoff-Nr. 2.4648

EL-NiCr19Nb

AWS A5.11 ENiCrFe--3 mod.

Delivery program

Plates in Oberhausen

Standard format: Super-format 2000X6000mm (We can also cut)

Thickness:          2,0/3,0/4,0/5,0/6,0/8,0/10/12/15/20/25/30/38,1mm

 

Standards: VdTÜV 412 und 434/ ASTM & ASME/ EN 10204 3.1 (3.2 on request)

Services Available :

Water jet cutting / plasma cutting / shear cutting

 

Bars in Oberhausen:

Ranges  Ø12-120mm

Other sizes can be produced within a short delivery time.
Rings and forgings can be manufactured also within a short delivery time.

Services: Sawing / forging (external)

 

Strip in Oberhausen

2mm Strip

Services: Slitting (external) / producing welded tube (external)

 

Fittings:

Fittings/ Flanges and other parts are available within short delivery times (1-6 Weeks)

 

Our special services:

Tailor made packages, material consulting, plates, bars, strip and pre-material for forging in stock

Material with similar field of application

Alloy 602ca / 2.4633

Alloy 600/ 2.4816

Alloy 601/ 2.4851

Material Outlet by Hempel

ECONOXX.com offers buyers a new and uncomplicated procurement channel, which also includes small quantities and materials in special alloys at favourable conditions.

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Product Count

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Round bars Round bars
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Rupert Gordon
Rupert Gordon
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