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Incoloy 800H/HT Seamless Pipe
Incoloy 800H/HT Seamless Pipe
Incoloy 800H/HT Seamless Pipe
Incoloy 800H/HT Seamless Pipe

Incoloy 800H/HT Seamless Pipe

Incoloy 800H/HT is an austenitic heat-resistant alloy widely used in high-temperature pressure-bearing structural parts. The high strength of 800H/HT is mainly due to the addition of carbon, aluminum, and titanium, and it is annealed at a minimum temperature of 1149℃ to achieve The grain size is ASTM5 grade or coarser.
Description
For 800 H/HT used below 787°C, use 82 (ER NiCr-3) welding wire. RA 330-04 (N08334) welding wire has a matching thermal expansion coefficient and higher strength. If you want to obtain the maximum mechanical strength , It is best to use welding wire 617 (ERNiCrCoMo-1) or welding rod 117 (ENiCrCoMo-1).
In order to avoid the possible stress relaxation of 800H/HT welded parts above 538°C and cause grain boundary cracking, post-weld heat treatment is required at 899°C. The holding time is based on the material thickness for one hour per 25 mm (at least half an hour/25 mm thickness) ), then air-cooled.
Material Standard: UNS American Standard: N08811, N08810 W. Nr./EN European Standard: 1.4958, 1.4959 ASTM: B 409, B 408, B 407 ASME: SB-409, SB-408, SB-407 Code Case 1325
Chemical composition ,%

chromium
nickel
manganese
silicon
aluminum
titanium
Aluminum + Titanium
carbon
copper
phosphorus
sulfur
iron
Minimum
19.0
30.0
-
-
0.15
0.15
0.85
0.06
-
-
-
39.5
Max
23.0
35.0
1.5
1.0
0.6
0.6
1.2
0.1
0.75
0.045
0.015
-
High material characteristics of ASME VIII material design allowable stress value (allowable temperature up to 1650°F) Good high temperature oxidation resistance (up to 1900°F) Chloride ion stress corrosion cracking is mainly used for hydrogen production in ethylene cracking furnace quenching boiler reformer lower furnace section manifold, pigtail gasifier inner sleeve member electrical heating element physical properties density: 0.287 LB / IN3
Melting point range: 2475-2525°F
Temperature, °F
70
1400
1600
1800
Coefficient of thermal expansion*, in/in°F x 10-6
-
9.9
10.2
-
Thermal conductivity,
Btu · ft/ft2 · hr · °F
6.7
13.8
15.1
17.8
Elastic Modulus,
psi x 10 6
28.5
21.1
19.2
-
* From 70°F to relevant temperature value
Material mechanical properties represent tensile properties
Temperature, °F
70
1000
1200
1400
1600
1800
Tensile strength, ksi
77
63.5
55.7
32.3
18.6
10.2
0.2% deformation yield strength, ksi
29
16.5
14.8
14.4
11.6
8.9
Elongation,%
52
51
50
78
120
120
Typical creep rupture performance
Temperature, °F
1400
1600
1800
Minimum creep 0.0001%/hour, ksi
6.0
3.6
1.05
Breaking strength at 10000 hours, ksi
7.3
3.5
1.2
Incoloy 800H (UNS N08810/W Nr.1.4958) Chemical composition of Incoloy 800H:
alloy
%
nickel
chromium
iron
carbon
manganese
silicon
copper
sulfur
aluminum
titanium
800
The smallest
30
19






0.15
0.15
maximum
35
twenty three
margin
0.10
1.5
1
0.75
0.015
0.60
0.60

800H
The smallest
30
19

0.05




0.15
0.15
maximum
35
twenty three
margin
0.10
1.5
1
0.75
0.015
0.60
0.60

800HT
The smallest
30
19

0.06




0.15
0.15
maximum
35
twenty three
margin
2
1.5
1
0.75
0.015
0.60
0.60

Aluminum + titanium is 0.85-1.20











Physical properties of Incoloy 800H:
density
8.0 g/cm3
Melting point
1350-1400 ℃
The minimum mechanical properties of Incoloy 800H alloy at room temperature:
alloy
tensile strength
Rm N/mm2
Yield Strength
RP0.2N / mm2
Elongation
A5%
800
500
210
35
800H
450
180
35
800H alloy has the following characteristics:
1. Excellent corrosion resistance in extremely high temperature aqueous media up to 500℃
2. Very good resistance to stress corrosion
3. Very good processability
Metallographic structure of Incoloy 800H :
800H is a face-centered cubic lattice structure. The extremely low carbon content and increased Ti:C ratio increase structural stability and maximum sensitization resistance and intergranular corrosion resistance. The low-temperature annealing at around 950°C ensures a fine-grained structure.
Corrosion resistance of Incoloy 800H:

800H can resist corrosion of many corrosive media. Its high nickel content makes it have good stress corrosion cracking resistance under water-based corrosion conditions The high chromium content makes it have better resistance to pitting corrosion and crevice corrosion cracking. The alloy has good corrosion resistance to nitric acid and organic acids, but its corrosion resistance in sulfuric acid and hydrochloric acid is limited. In addition to the possibility of pitting corrosion in halides, it has good corrosion resistance in oxidizing and non-oxidizing salts. It also has good corrosion resistance in water, steam and mixtures of steam, air and carbon dioxide .


Product Name Incoloy 800H/HT (UNS N08810/W.Nr.1.4958) Pipe
Type  Seamless
Shape Square / Rectangular / Round
Standard  GB,AISI,ASTM,DIN,EN,JIS
Grade Stainless steel 304 / 304L / 310S / 316L / 317L / 904L / 2205 / 2507 / 32760 / 253MA / 254Mo / S31803 / S32750 / S32205 etc
Monel 400 / Monel K-500 
Inconel 600 / Inconel 601 / Inconel 625 / Inconel 617 / Inconel 690 / Inconel 718 / Inconel X-750
Incoloy A-286 / Incoloy 800 / Incoloy 800H / Incoloy 800HT
Incoloy 825 / Incoloy 901 / Incoloy 925 / Incoloy 926
Nimonic 75 / Nimonic 80A / Nimonic 90 / Nimonic 105 / Nimonic 263 / Nimonic L-605
Hastelloy B / Hastelloy B-2 / Hastelloy B-3 / Hastelloy C / Hastelloy C-276 / Hastelloy C-22
Hastelloy C-4 / Hastelloy C-200 / Hastelloy G-35 / Hastelloy X / Hastelloy N
Austenitic stainless steel 904L / XM-19 / 316Ti / 316LN / 371L / 310S / 253MA
DP steel 254SMo / F50 / 2205 / 2507 / F55 / F60 / F61 / F65 
PH stainless steel 15-5PH / 17-4PH / 17-7PH 
Out diameter  Seamless Pipe 6MM - 1174MM or customized
Thickness  Seamless Pipe 1mm - 80mm or customized
Max Length Seamless Pipe 12000mm or customized
Finish  2B, Pickling, polished, brushed, sandblast, BA, EP,
Packing  waterproof polybag, wooden box, end cap, wooden crame/pallet
Inspection  TUV,SGS,BV,ABS,LR and so on
Application  Chemical, Pharmaceutical & Bio-Medical, Petrochemical & Refinery, Environmental, Food Processing, Aviation, Chemical Fertilizer, Sewage Disposal, Desalination, Waste Incineration etc. 
Processing Service  Machining : Turning / Milling / Planing / Drilling / Boring / Grinding / Gear Cutting / CNC Machining  
Deformation processing :  Bending / Cutting / Rolling / Stamping
Welded 
Forged 
Delivery Time 7-40 days
Trade Term FOB CIF CFR CIP DAP DDP EXW 
Payment T/T, L/C,D/A,D/P, Western Union,MoneyGram,According to customer requirements payments for offline orders.
Transportation By air, by sea, by train, by truck
Sample Free
Warranty Trade assurance after sales service


Production flow chart of seamless pipe1

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