VDM® Alloy 800 HP

Alternative and trade names
Nicrofer 3220 HP, Incoloy 800HT, VDM® Alloy 800 HP

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Description

1.4959 (X8NiCrAlTi32-218) is an austenitic nickel-ironchromium alloy with increased content of (Al + Ti), compared to VDM® Alloy 800 H. A special solution annealing results in a grain sizes ≥90 µm (ASTM No. 4) and highest creep rupture strength above 700°C (1,290°F) due to titanium carbide precipitation. Below 700°C (1,290°F), γ´ precipitates combined with a loss of ductility. It shows the following features and properties:

Excellent creep rupture strength at temperatures above 700°C

Good resistance to reducing, oxidizing and nitriding atmospheres and to atmospheres which alternate between reducing and oxidizing conditions

Metallurgical stability in long-term use at high temperatures

Equivalent Materials

This material data has been provided by VDM Metals.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

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Properties

General

Property	Value	Temperature
Density	8 g/cm³ Show Supplier Material materials with Density of 8 g/cm³ at 23.0 °C	23.0 °C

Mechanical

Property	Value	Temperature	Comment
Elastic modulus	194 GPa Show Supplier Material materials with Elastic modulus of 194 GPa at 20.0 °C	20.0 °C
	189 GPa Show Supplier Material materials with Elastic modulus of 189 GPa at 100.0 °C	100.0 °C
	183 GPa Show Supplier Material materials with Elastic modulus of 183 GPa at 200.0 °C	200.0 °C
	177 GPa Show Supplier Material materials with Elastic modulus of 177 GPa at 300.0 °C	300.0 °C
	170 GPa Show Supplier Material materials with Elastic modulus of 170 GPa at 400.0 °C	400.0 °C
	163 GPa Show Supplier Material materials with Elastic modulus of 163 GPa at 500.0 °C	500.0 °C
	156 GPa Show Supplier Material materials with Elastic modulus of 156 GPa at 600.0 °C	600.0 °C
	149 GPa Show Supplier Material materials with Elastic modulus of 149 GPa at 700.0 °C	700.0 °C
	141 GPa Show Supplier Material materials with Elastic modulus of 141 GPa at 800.0 °C	800.0 °C
	134 GPa Show Supplier Material materials with Elastic modulus of 134 GPa at 900.0 °C	900.0 °C
	127 GPa Show Supplier Material materials with Elastic modulus of 127 GPa at 1000.0 °C	1000.0 °C
	120 GPa Show Supplier Material materials with Elastic modulus of 120 GPa at 1100.0 °C	1100.0 °C
	113 GPa Show Supplier Material materials with Elastic modulus of 113 GPa at 1200.0 °C	1200.0 °C

Elongation	35 % Show Supplier Material materials with Elongation of 35 % at 23.0 °C	23.0 °C	Typical mechanical properties
Elongation, transverse	30 % Show Supplier Material materials with Elongation, transverse of 30 % at 23.0 °C	23.0 °C
Impact strength, Charpy notched	1500 kJ/m² Show Supplier Material materials with Impact strength, Charpy notched of 1500 kJ/m² at 23.0 °C	23.0 °C
Tensile strength	450 - 700 MPa Show Supplier Material materials with Tensile strength of 450 - 700 MPa at 20.0 °C	20.0 °C	Typical mechanical properties
	425 MPa Show Supplier Material materials with Tensile strength of 425 MPa at 100.0 °C	100.0 °C	Typical mechanical properties
	400 MPa Show Supplier Material materials with Tensile strength of 400 MPa at 200.0 °C	200.0 °C	Typical mechanical properties
	390 MPa Show Supplier Material materials with Tensile strength of 390 MPa at 300.0 °C	300.0 °C	Typical mechanical properties
	380 MPa Show Supplier Material materials with Tensile strength of 380 MPa at 400.0 °C	400.0 °C	Typical mechanical properties
	360 MPa Show Supplier Material materials with Tensile strength of 360 MPa at 500.0 °C	500.0 °C	Typical mechanical properties
	300 MPa Show Supplier Material materials with Tensile strength of 300 MPa at 600.0 °C	600.0 °C	Typical mechanical properties
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Yield strength Rp0.2	170 MPa Show Supplier Material materials with Yield strength Rp0.2 of 170 MPa at 20.0 °C	20.0 °C	Typical mechanical properties
	140 MPa Show Supplier Material materials with Yield strength Rp0.2 of 140 MPa at 100.0 °C	100.0 °C	Typical mechanical properties
	115 MPa Show Supplier Material materials with Yield strength Rp0.2 of 115 MPa at 200.0 °C	200.0 °C	Typical mechanical properties
	95 MPa Show Supplier Material materials with Yield strength Rp0.2 of 95 MPa at 300.0 °C	300.0 °C	Typical mechanical properties
	85 MPa Show Supplier Material materials with Yield strength Rp0.2 of 85 MPa at 400.0 °C	400.0 °C	Typical mechanical properties
	80 MPa Show Supplier Material materials with Yield strength Rp0.2 of 80 MPa at 500.0 °C	500.0 °C	Typical mechanical properties
	75 MPa Show Supplier Material materials with Yield strength Rp0.2 of 75 MPa at 600.0 °C	600.0 °C	Typical mechanical properties
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impactTransVNotch	1000 kJ/m² Show Supplier Material materials with impactTransVNotch of 1000 kJ/m² at 23.0 °C	23.0 °C

Thermal

Property	Value	Temperature
Coefficient of thermal expansion	1.4E-5 1/K Show Supplier Material materials with Coefficient of thermal expansion of 1.4E-5 1/K at 20.0 °C	20.0 °C
	1.41E-5 1/K Show Supplier Material materials with Coefficient of thermal expansion of 1.41E-5 1/K at 100.0 °C	100.0 °C
	1.46E-5 1/K Show Supplier Material materials with Coefficient of thermal expansion of 1.46E-5 1/K at 200.0 °C	200.0 °C
	1.49E-5 1/K Show Supplier Material materials with Coefficient of thermal expansion of 1.49E-5 1/K at 300.0 °C	300.0 °C
	1.52E-5 1/K Show Supplier Material materials with Coefficient of thermal expansion of 1.52E-5 1/K at 400.0 °C	400.0 °C
	1.55E-5 1/K Show Supplier Material materials with Coefficient of thermal expansion of 1.55E-5 1/K at 500.0 °C	500.0 °C
	1.59E-5 1/K Show Supplier Material materials with Coefficient of thermal expansion of 1.59E-5 1/K at 600.0 °C	600.0 °C
	1.64E-5 1/K Show Supplier Material materials with Coefficient of thermal expansion of 1.64E-5 1/K at 700.0 °C	700.0 °C
	1.7E-5 1/K Show Supplier Material materials with Coefficient of thermal expansion of 1.7E-5 1/K at 800.0 °C	800.0 °C
	1.74E-5 1/K Show Supplier Material materials with Coefficient of thermal expansion of 1.74E-5 1/K at 900.0 °C	900.0 °C
	1.78E-5 1/K Show Supplier Material materials with Coefficient of thermal expansion of 1.78E-5 1/K at 1000.0 °C	1000.0 °C
	1.83E-5 1/K Show Supplier Material materials with Coefficient of thermal expansion of 1.83E-5 1/K at 1100.0 °C	1100.0 °C
	1.87E-5 1/K Show Supplier Material materials with Coefficient of thermal expansion of 1.87E-5 1/K at 1200.0 °C	1200.0 °C
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Melting point	1350 - 1400 °C Show Supplier Material materials with Melting point of 1350 - 1400 °C
Specific heat capacity	443 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 443 J/(kg·K) at 20.0 °C	20.0 °C
	457 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 457 J/(kg·K) at 100.0 °C	100.0 °C
	474 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 474 J/(kg·K) at 200.0 °C	200.0 °C
	492 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 492 J/(kg·K) at 300.0 °C	300.0 °C
	512 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 512 J/(kg·K) at 400.0 °C	400.0 °C
	548 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 548 J/(kg·K) at 500.0 °C	500.0 °C
	578 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 578 J/(kg·K) at 600.0 °C	600.0 °C
	588 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 588 J/(kg·K) at 700.0 °C	700.0 °C
	598 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 598 J/(kg·K) at 800.0 °C	800.0 °C
	602 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 602 J/(kg·K) at 900.0 °C	900.0 °C
	613 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 613 J/(kg·K) at 1000.0 °C	1000.0 °C
	628 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 628 J/(kg·K) at 1100.0 °C	1100.0 °C
	634 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 634 J/(kg·K) at 1200.0 °C	1200.0 °C
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Thermal conductivity	12.4 W/(m·K) Show Supplier Material materials with Thermal conductivity of 12.4 W/(m·K) at 20.0 °C	20.0 °C
	13.7 W/(m·K) Show Supplier Material materials with Thermal conductivity of 13.7 W/(m·K) at 100.0 °C	100.0 °C
	15.3 W/(m·K) Show Supplier Material materials with Thermal conductivity of 15.3 W/(m·K) at 200.0 °C	200.0 °C
	17 W/(m·K) Show Supplier Material materials with Thermal conductivity of 17 W/(m·K) at 300.0 °C	300.0 °C
	18.9 W/(m·K) Show Supplier Material materials with Thermal conductivity of 18.9 W/(m·K) at 400.0 °C	400.0 °C
	21.4 W/(m·K) Show Supplier Material materials with Thermal conductivity of 21.4 W/(m·K) at 500.0 °C	500.0 °C
	23.6 W/(m·K) Show Supplier Material materials with Thermal conductivity of 23.6 W/(m·K) at 600.0 °C	600.0 °C
	24.7 W/(m·K) Show Supplier Material materials with Thermal conductivity of 24.7 W/(m·K) at 700.0 °C	700.0 °C
	25.8 W/(m·K) Show Supplier Material materials with Thermal conductivity of 25.8 W/(m·K) at 800.0 °C	800.0 °C
	26.7 W/(m·K) Show Supplier Material materials with Thermal conductivity of 26.7 W/(m·K) at 900.0 °C	900.0 °C
	28 W/(m·K) Show Supplier Material materials with Thermal conductivity of 28 W/(m·K) at 1000.0 °C	1000.0 °C
	29.6 W/(m·K) Show Supplier Material materials with Thermal conductivity of 29.6 W/(m·K) at 1100.0 °C	1100.0 °C
	30.6 W/(m·K) Show Supplier Material materials with Thermal conductivity of 30.6 W/(m·K) at 1200.0 °C	1200.0 °C
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Electrical

Property	Value	Temperature
Electrical resistivity	1.01E-6 Ω·m Show Supplier Material materials with Electrical resistivity of 1.01E-6 Ω·m at 20.0 °C	20.0 °C
	1.04E-6 Ω·m Show Supplier Material materials with Electrical resistivity of 1.04E-6 Ω·m at 100.0 °C	100.0 °C
	1.08E-6 Ω·m Show Supplier Material materials with Electrical resistivity of 1.08E-6 Ω·m at 200.0 °C	200.0 °C
	1.12E-6 Ω·m Show Supplier Material materials with Electrical resistivity of 1.12E-6 Ω·m at 300.0 °C	300.0 °C
	1.15E-6 Ω·m Show Supplier Material materials with Electrical resistivity of 1.15E-6 Ω·m at 400.0 °C	400.0 °C
	1.18E-6 Ω·m Show Supplier Material materials with Electrical resistivity of 1.18E-6 Ω·m at 500.0 °C	500.0 °C
	1.2E-6 Ω·m Show Supplier Material materials with Electrical resistivity of 1.2E-6 Ω·m at 600.0 °C	600.0 °C
	1.22E-6 Ω·m Show Supplier Material materials with Electrical resistivity of 1.22E-6 Ω·m at 700.0 °C	700.0 °C
	1.24E-6 Ω·m Show Supplier Material materials with Electrical resistivity of 1.24E-6 Ω·m at 800.0 °C	800.0 °C
	1.26E-6 Ω·m Show Supplier Material materials with Electrical resistivity of 1.26E-6 Ω·m at 900.0 °C	900.0 °C
	1.27E-6 Ω·m Show Supplier Material materials with Electrical resistivity of 1.27E-6 Ω·m at 1000.0 °C	1000.0 °C
	1.28E-6 Ω·m Show Supplier Material materials with Electrical resistivity of 1.28E-6 Ω·m at 1100.0 °C	1100.0 °C
	1.29E-6 Ω·m Show Supplier Material materials with Electrical resistivity of 1.29E-6 Ω·m at 1200.0 °C	1200.0 °C
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Magnetic

Property	Value	Temperature
Relative magnetic permeability	1.01 [-] Show Supplier Material materials with Relative magnetic permeability of 1.01 [-] at 23.0 °C	23.0 °C

Chemical properties

Property
Aluminium	0.2 - 0.6 %
Carbon	0.06 - 0.1 %
Chromium	19 - 22 %
Copper	0.5 %	max.
Iron	43 - 50 %
Manganese	0.5 - 1 %
Nickel	30 - 32 %
Other	0.85 - 1.2 %	Al+Ti
Phosphorus	0.02 %	max.
Silicon	0.2 - 0.6 %
Sulfur	0.01 %	max.
Titanium	0.3 - 0.6 %

Technological properties

Property
Application areas	VDM® Alloy 800 HP has a wide range of applications in areas of elevated temperatures in furnace construction, in the chemical industry, in environmental protection equipment, in the automotive industry and in power plants. Typical applications include furnace muffles, containers, bins, holders in various heat treatment plants and burner components. Because of its resistance to carburization and nitriding, the alloy is furthermore used in the areas of: steam and hydrocarbon reformers, ethylene pyrolysis, Equipment for acetic anhydride and ketone production.
Cold Forming	Cold working should be carried out on annealed material. VDM® Alloy 800 HP has a higher work hardening rate than austenitic stainless steels. This must be taken into account during design and selection of forming tools and equipment and during the planning of the forming processes. Intermediate annealing may be necessary at high degrees of cold working deformation. After cold working with more than 10 % deformation the material should be solution annealed.
Corrosion properties	The high nickel and chromium contents in VDM® Alloy 800 HP ensure excellent resistance to oxidation. The alloy is also highly resistant to carburizing, nitriding and oxidation in sulphurous atmospheres. The protective oxide layer is adherent under static and cyclic thermal stress. The material is particularly resistant to carburization if a thin oxide film was formed by pre-oxidation. The resistance to hydrogen embrittlement of VDM® Alloy 800 HP is excellent, so that the alloys can be used in the production of hydrogen and steam and hydrocarbon reformers.
General machinability	VDM® Alloy 800 HP should be machined in the solution annealed condition. As the alloys are prone to work-hardening, low cutting speeds and appropriate feed rates should be used and the tool should be engaged at all times. Sufficient chip depths are important to get below the work-hardened surface layer. Due to the high temperature loads on the cutting edge during machining, large amounts of cooling lubricants should be used. Water-based emulsions, as they are also used for construction and stainless steels, are suitable for instance.
Heat Treatment	Solution heat treatment should be carried out at 1,150-1,200°C. Water quenching should be carried out rapidly if the material should be further fabricated after solution annealing. Workpieces of less than 3 mm (0.12 in) thickness can be cooled down using air nozzles. If the solution annealing is the last fabrication step, the material can be cooled down more slowly in order to avoid material distortion. Solution annealed VDM® Alloy 800 HP is prone to stress relaxation cracks in the temperature range of 550 and 750°C and should therefore be subjected to stabilizing annealing when a continuous operation (> 100 h) in the mentioned temperature range is intended. The stabilizing annealing temperature depends on the welding material and should be determined with VDM Metals’ Technical Customer Support. If possible, the stabilizing annealing should be carried out when all welding work is completed, because the heat-affected zones of the welds are particularly susceptible to cracking. Heating rates are critical and should not be too high to avoid disortion.
Hot forming	VDM® Alloy 800 HP may be hot-worked in the temperature range 1,200 to 900°C (2,192 to 1,650°F) with subsequent rapid cooling down in water or by using air. In particular the temperature range from 760 to 540 °C (1,400 to 1,004°F) must be passed quickly. Hot bending is carried out at 1,150 to 1,000°C (2,102 to 1,832°F). The furnace should be heated up to maximum working temperature (1,200°C/2,192°F) before workpieces are inserted into the preheated furnace. The holding time is about 60 minutes per 100 mm thickness. After the hot forming a solution heat treatment is recommended in order to achieve optimum creep strength.
Other	VDM® Alloy 800 HP is an austenitic solid solution alloy which precipitates carbides and γ’ phase during high-temperature ageing.
Welding	For welding, VDM® Alloy 800 HP should be in the annealed condition and be free from scale, grease and markings. VDM® Alloy 800 H can be welded using the following procedures: GTAW (TIG), GTAW (TIG) hot wire, plasma, SMAW (MMA), GMAW (MIG/MAG) and submerged arc welding.

VDM® Alloy 800 HP

Description

Equivalent Materials

Ashby charts

Applications

Materials by this supplier

Use cases

Properties