English 
Another member of the 800 alloy family is Incoloy 800HT. Also sold as Nickel Alloy 800HT, this nickel-iron-chromium alloy, has many of the same characteristics of other members of the 800 alloy grouping. Incoloy 800HT has roughly the same chemical composition as Incoloy 800H, differing only slightly in carbon, aluminum, and titanium levels.
Fe 39.5% min
Ni 30-35%
Cr 19-23%
Al+Ti .85-1.20%
C .06-.10%
A good way to understand the difference between 800HT and 800H is that the chemical composition of Incoloy 800HT will always be within the limits of Incoloy 800H, but the reverse is not true.
Incoloy 800HT is known for many of the same outstanding characteristics as Incoloy 800H including:
Excellent resistance to oxidation, sulfidation, and carburization
Higher creep and rupture properties for high temperature situations above 1100°F (600°C)
Resistant to high temperature corrosion and prolonged exposure
Readily machined by standard methods
Resistance to aqueous corrosion at moderate temperatures
User of Incoloy 800HT and Nickel Alloy 800HT use the alloy for a wide range of high-temperature applications including:
Hydrocarbon cracking
Industrial furnace and boiler components and equipment
Equipment for Heat-Treating
Pressure vessels and heat exchangers
Chemical and Petrochemical processing
Jiangsu HYT is a distributor of Incoloy 800HT and Nickel Alloy 800HT in pipe, tube, sheet, strip, plate round bar, flat bar, forging stock, hexagon, and wire. As with everything we source, each form of Incoloy 800HT meets different critical industrial standards from organizations like ASTM, ASME, BS, SEW, DIN, EN, and ISO.
We stock and sell Nickel Alloy 800HT and Incoloy 800HT in Pipe, tube, sheet, strip, plate, round bar, flat bar, forging stock, hexagon and wire.
Chemical Composition of Nickel Alloy 800HT Incoloy 800HT (% by weight)
| Element | Min | Max |
| Ni | 30 | 35 |
| Fe | - | 39.5 |
| Cr | 19 | 23 |
| Cu | - | 0.75 |
| Ti | 0.25 | 0.6 |
| Al | 0.25 | 0.6 |
| C | 0.06 | 0.1 |
| Mn | - | 1.5 |
| S | - | 0.015 |
| Si | - | 1.0 |
Physical Properties of Nickel Alloy 800HT Incoloy 800HT (Room Temperature)
| Specific Heat (0-100°C) | 460 | J.kg-1.°K-1 |
| Thermal Conductivity | 11.5 | W.m -1.°K-1 |
| Thermal Expansion | 14.4 | mm/m/°C |
| Modulus Elasticity | 208 | GPa |
| Electrical Resistivity | 9.89 | µohm/cm |
| Density | 7.94 | g/cm3 |
Mechanical Properties of Nickel Alloy 800HT Incoloy 800HT
| Tensile Rm | 65 | ksi (min) |
| Tensile Rm | 448 | MPa (min) |
| R.p. 0.2% Yield | 25 | ksi(min) |
| R.p. 0.2% Yield | 172 | MPa (min) |
| Elongation (2” or 4D gl) | 20 | % (min) |
Nickel Alloy 800HT and Incoloy 800HT Standards
| Rod, Bar, Wire, Forgings, and Forging Stock | ASTM B 408 & ASME SB 408 ASTM B 564 & ASME SB 564 ASME Code Case 1325 ASME Code Case 1949 ISO 9723 ISO 9724 ISO 9725 BS 3076NA15 BS 3075NA15 SEW 470 VdTÜV 412 & 434 DIN 17460 EN 10095 |
| Plate, Sheet, and Strip | ASTM A 240/A 480 ASME SA 240/SA 480 ASTM B 409/B 906 ASME SB 409/SB 906 ASME Code Case 1325 ASME Code Case 2339 BS 3072NA15 BS 3073NA15 SEW 470 VdTÜV 412 & 434 DIN 17460 EN 10028-7 & EN 10095 |
| Pipe & Tube | ASTM B 163 ASME SB 163 ASTM B 407/B 829 ASME SB 407/SB 829 ASTM B 514/B 775 ASME SB 514/SB 775 ASTM B 515/B 751 ASME SB 515/SB 751 ASME Code Case 1325 and 1983 BS 3074NA15 SEW 470 VdTÜV 412 & 434 ISO 6207 DIN 17459 |
| Fittings | ASTM B 366 ASME SB 366 |
Another member of the 800 alloy family is Incoloy 800HT. Also sold as Nickel Alloy 800HT, this nickel-iron-chromium alloy, has many of the same characteristics of other members of the 800 alloy grouping. Incoloy 800HT has roughly the same chemical composition as Incoloy 800H, differing only slightly in carbon, aluminum, and titanium levels.
Fe 39.5% min
Ni 30-35%
Cr 19-23%
Al+Ti .85-1.20%
C .06-.10%
A good way to understand the difference between 800HT and 800H is that the chemical composition of Incoloy 800HT will always be within the limits of Incoloy 800H, but the reverse is not true.
Incoloy 800HT is known for many of the same outstanding characteristics as Incoloy 800H including:
Excellent resistance to oxidation, sulfidation, and carburization
Higher creep and rupture properties for high temperature situations above 1100°F (600°C)
Resistant to high temperature corrosion and prolonged exposure
Readily machined by standard methods
Resistance to aqueous corrosion at moderate temperatures
User of Incoloy 800HT and Nickel Alloy 800HT use the alloy for a wide range of high-temperature applications including:
Hydrocarbon cracking
Industrial furnace and boiler components and equipment
Equipment for Heat-Treating
Pressure vessels and heat exchangers
Chemical and Petrochemical processing
Jiangsu HYT is a distributor of Incoloy 800HT and Nickel Alloy 800HT in pipe, tube, sheet, strip, plate round bar, flat bar, forging stock, hexagon, and wire. As with everything we source, each form of Incoloy 800HT meets different critical industrial standards from organizations like ASTM, ASME, BS, SEW, DIN, EN, and ISO.
We stock and sell Nickel Alloy 800HT and Incoloy 800HT in Pipe, tube, sheet, strip, plate, round bar, flat bar, forging stock, hexagon and wire.
Chemical Composition of Nickel Alloy 800HT Incoloy 800HT (% by weight)
| Element | Min | Max |
| Ni | 30 | 35 |
| Fe | - | 39.5 |
| Cr | 19 | 23 |
| Cu | - | 0.75 |
| Ti | 0.25 | 0.6 |
| Al | 0.25 | 0.6 |
| C | 0.06 | 0.1 |
| Mn | - | 1.5 |
| S | - | 0.015 |
| Si | - | 1.0 |
Physical Properties of Nickel Alloy 800HT Incoloy 800HT (Room Temperature)
| Specific Heat (0-100°C) | 460 | J.kg-1.°K-1 |
| Thermal Conductivity | 11.5 | W.m -1.°K-1 |
| Thermal Expansion | 14.4 | mm/m/°C |
| Modulus Elasticity | 208 | GPa |
| Electrical Resistivity | 9.89 | µohm/cm |
| Density | 7.94 | g/cm3 |
Mechanical Properties of Nickel Alloy 800HT Incoloy 800HT
| Tensile Rm | 65 | ksi (min) |
| Tensile Rm | 448 | MPa (min) |
| R.p. 0.2% Yield | 25 | ksi(min) |
| R.p. 0.2% Yield | 172 | MPa (min) |
| Elongation (2” or 4D gl) | 20 | % (min) |
Nickel Alloy 800HT and Incoloy 800HT Standards
| Rod, Bar, Wire, Forgings, and Forging Stock | ASTM B 408 & ASME SB 408 ASTM B 564 & ASME SB 564 ASME Code Case 1325 ASME Code Case 1949 ISO 9723 ISO 9724 ISO 9725 BS 3076NA15 BS 3075NA15 SEW 470 VdTÜV 412 & 434 DIN 17460 EN 10095 |
| Plate, Sheet, and Strip | ASTM A 240/A 480 ASME SA 240/SA 480 ASTM B 409/B 906 ASME SB 409/SB 906 ASME Code Case 1325 ASME Code Case 2339 BS 3072NA15 BS 3073NA15 SEW 470 VdTÜV 412 & 434 DIN 17460 EN 10028-7 & EN 10095 |
| Pipe & Tube | ASTM B 163 ASME SB 163 ASTM B 407/B 829 ASME SB 407/SB 829 ASTM B 514/B 775 ASME SB 514/SB 775 ASTM B 515/B 751 ASME SB 515/SB 751 ASME Code Case 1325 and 1983 BS 3074NA15 SEW 470 VdTÜV 412 & 434 ISO 6207 DIN 17459 |
| Fittings | ASTM B 366 ASME SB 366 |
