General

Property | Temperature | Value |
---|---|---|

Density | 23.0 °C | 8 g/cm³ Show Supplier Material materials with Density of 8 g/cm³ |

Mechanical

Property | Temperature | Value | Comment |
---|---|---|---|

Elastic modulus | 20.0 °C | 194 GPa Show Supplier Material materials with Elastic modulus of 194 GPa | |

100.0 °C | 189 GPa Show Supplier Material materials with Elastic modulus of 189 GPa | ||

200.0 °C | 183 GPa Show Supplier Material materials with Elastic modulus of 183 GPa | ||

300.0 °C | 177 GPa Show Supplier Material materials with Elastic modulus of 177 GPa | ||

400.0 °C | 170 GPa Show Supplier Material materials with Elastic modulus of 170 GPa | ||

500.0 °C | 163 GPa Show Supplier Material materials with Elastic modulus of 163 GPa | ||

600.0 °C | 156 GPa Show Supplier Material materials with Elastic modulus of 156 GPa | ||

700.0 °C | 149 GPa Show Supplier Material materials with Elastic modulus of 149 GPa | ||

800.0 °C | 141 GPa Show Supplier Material materials with Elastic modulus of 141 GPa | ||

900.0 °C | 134 GPa Show Supplier Material materials with Elastic modulus of 134 GPa | ||

1000.0 °C | 127 GPa Show Supplier Material materials with Elastic modulus of 127 GPa | ||

1100.0 °C | 120 GPa Show Supplier Material materials with Elastic modulus of 120 GPa | ||

1200.0 °C | 113 GPa Show Supplier Material materials with Elastic modulus of 113 GPa | ||

Elongation | 23.0 °C | 35 % Show Supplier Material materials with Elongation of 35 % | Typical mechanical properties |

Elongation, transverse | 23.0 °C | 30 % Show Supplier Material materials with Elongation, transverse of 30 % | |

Impact strength, Charpy notched | 23.0 °C | 1500 kJ/m² Show Supplier Material materials with Impact strength, Charpy notched of 1500 kJ/m² | |

Tensile strength | 20.0 °C | 450 - 700 MPa Show Supplier Material materials with Tensile strength of 450 - 700 MPa | Typical mechanical properties |

100.0 °C | 425 MPa Show Supplier Material materials with Tensile strength of 425 MPa | Typical mechanical properties | |

200.0 °C | 400 MPa Show Supplier Material materials with Tensile strength of 400 MPa | Typical mechanical properties | |

300.0 °C | 390 MPa Show Supplier Material materials with Tensile strength of 390 MPa | Typical mechanical properties | |

400.0 °C | 380 MPa Show Supplier Material materials with Tensile strength of 380 MPa | Typical mechanical properties | |

500.0 °C | 360 MPa Show Supplier Material materials with Tensile strength of 360 MPa | Typical mechanical properties | |

600.0 °C | 300 MPa Show Supplier Material materials with Tensile strength of 300 MPa | Typical mechanical properties | |

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Yield strength Rp0.2 | 20.0 °C | 170 MPa Show Supplier Material materials with Yield strength Rp0.2 of 170 MPa | Typical mechanical properties |

100.0 °C | 140 MPa Show Supplier Material materials with Yield strength Rp0.2 of 140 MPa | Typical mechanical properties | |

200.0 °C | 115 MPa Show Supplier Material materials with Yield strength Rp0.2 of 115 MPa | Typical mechanical properties | |

300.0 °C | 95 MPa Show Supplier Material materials with Yield strength Rp0.2 of 95 MPa | Typical mechanical properties | |

400.0 °C | 85 MPa Show Supplier Material materials with Yield strength Rp0.2 of 85 MPa | Typical mechanical properties | |

500.0 °C | 80 MPa Show Supplier Material materials with Yield strength Rp0.2 of 80 MPa | Typical mechanical properties | |

600.0 °C | 75 MPa Show Supplier Material materials with Yield strength Rp0.2 of 75 MPa | Typical mechanical properties | |

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impactTransVNotch | 23.0 °C | 1000 kJ/m² Show Supplier Material materials with impactTransVNotch of 1000 kJ/m² |

Thermal

Property | Temperature | Value |
---|---|---|

Coefficient of thermal expansion | 20.0 °C | 1.4E-5 1/K Show Supplier Material materials with Coefficient of thermal expansion of 1.4E-5 1/K |

100.0 °C | 1.41E-5 1/K Show Supplier Material materials with Coefficient of thermal expansion of 1.41E-5 1/K | |

200.0 °C | 1.46E-5 1/K Show Supplier Material materials with Coefficient of thermal expansion of 1.46E-5 1/K | |

300.0 °C | 1.49E-5 1/K Show Supplier Material materials with Coefficient of thermal expansion of 1.49E-5 1/K | |

400.0 °C | 1.52E-5 1/K Show Supplier Material materials with Coefficient of thermal expansion of 1.52E-5 1/K | |

500.0 °C | 1.55E-5 1/K Show Supplier Material materials with Coefficient of thermal expansion of 1.55E-5 1/K | |

600.0 °C | 1.59E-5 1/K Show Supplier Material materials with Coefficient of thermal expansion of 1.59E-5 1/K | |

700.0 °C | 1.64E-5 1/K Show Supplier Material materials with Coefficient of thermal expansion of 1.64E-5 1/K | |

800.0 °C | 1.7E-5 1/K Show Supplier Material materials with Coefficient of thermal expansion of 1.7E-5 1/K | |

900.0 °C | 1.74E-5 1/K Show Supplier Material materials with Coefficient of thermal expansion of 1.74E-5 1/K | |

1000.0 °C | 1.78E-5 1/K Show Supplier Material materials with Coefficient of thermal expansion of 1.78E-5 1/K | |

1100.0 °C | 1.83E-5 1/K Show Supplier Material materials with Coefficient of thermal expansion of 1.83E-5 1/K | |

1200.0 °C | 1.87E-5 1/K Show Supplier Material materials with Coefficient of thermal expansion of 1.87E-5 1/K | |

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Melting point | 1350 - 1400 °C Show Supplier Material materials with Melting point of 1350 - 1400 °C | |

Specific heat capacity | 20.0 °C | 443 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 443 J/(kg·K) |

100.0 °C | 457 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 457 J/(kg·K) | |

200.0 °C | 474 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 474 J/(kg·K) | |

300.0 °C | 492 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 492 J/(kg·K) | |

400.0 °C | 512 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 512 J/(kg·K) | |

500.0 °C | 548 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 548 J/(kg·K) | |

600.0 °C | 578 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 578 J/(kg·K) | |

700.0 °C | 588 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 588 J/(kg·K) | |

800.0 °C | 598 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 598 J/(kg·K) | |

900.0 °C | 602 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 602 J/(kg·K) | |

1000.0 °C | 613 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 613 J/(kg·K) | |

1100.0 °C | 628 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 628 J/(kg·K) | |

1200.0 °C | 634 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 634 J/(kg·K) | |

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Thermal conductivity | 20.0 °C | 12.4 W/(m·K) Show Supplier Material materials with Thermal conductivity of 12.4 W/(m·K) |

100.0 °C | 13.7 W/(m·K) Show Supplier Material materials with Thermal conductivity of 13.7 W/(m·K) | |

200.0 °C | 15.3 W/(m·K) Show Supplier Material materials with Thermal conductivity of 15.3 W/(m·K) | |

300.0 °C | 17 W/(m·K) Show Supplier Material materials with Thermal conductivity of 17 W/(m·K) | |

400.0 °C | 18.9 W/(m·K) Show Supplier Material materials with Thermal conductivity of 18.9 W/(m·K) | |

500.0 °C | 21.4 W/(m·K) Show Supplier Material materials with Thermal conductivity of 21.4 W/(m·K) | |

600.0 °C | 23.6 W/(m·K) Show Supplier Material materials with Thermal conductivity of 23.6 W/(m·K) | |

700.0 °C | 24.7 W/(m·K) Show Supplier Material materials with Thermal conductivity of 24.7 W/(m·K) | |

800.0 °C | 25.8 W/(m·K) Show Supplier Material materials with Thermal conductivity of 25.8 W/(m·K) | |

900.0 °C | 26.7 W/(m·K) Show Supplier Material materials with Thermal conductivity of 26.7 W/(m·K) | |

1000.0 °C | 28 W/(m·K) Show Supplier Material materials with Thermal conductivity of 28 W/(m·K) | |

1100.0 °C | 29.6 W/(m·K) Show Supplier Material materials with Thermal conductivity of 29.6 W/(m·K) | |

1200.0 °C | 30.6 W/(m·K) Show Supplier Material materials with Thermal conductivity of 30.6 W/(m·K) | |

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Electrical

Property | Temperature | Value |
---|---|---|

Electrical resistivity | 20.0 °C | 1.01E-6 Ω·m Show Supplier Material materials with Electrical resistivity of 1.01E-6 Ω·m |

100.0 °C | 1.04E-6 Ω·m Show Supplier Material materials with Electrical resistivity of 1.04E-6 Ω·m | |

200.0 °C | 1.08E-6 Ω·m Show Supplier Material materials with Electrical resistivity of 1.08E-6 Ω·m | |

300.0 °C | 1.12E-6 Ω·m Show Supplier Material materials with Electrical resistivity of 1.12E-6 Ω·m | |

400.0 °C | 1.15E-6 Ω·m Show Supplier Material materials with Electrical resistivity of 1.15E-6 Ω·m | |

500.0 °C | 1.18E-6 Ω·m Show Supplier Material materials with Electrical resistivity of 1.18E-6 Ω·m | |

600.0 °C | 1.2E-6 Ω·m Show Supplier Material materials with Electrical resistivity of 1.2E-6 Ω·m | |

700.0 °C | 1.22E-6 Ω·m Show Supplier Material materials with Electrical resistivity of 1.22E-6 Ω·m | |

800.0 °C | 1.24E-6 Ω·m Show Supplier Material materials with Electrical resistivity of 1.24E-6 Ω·m | |

900.0 °C | 1.26E-6 Ω·m Show Supplier Material materials with Electrical resistivity of 1.26E-6 Ω·m | |

1000.0 °C | 1.27E-6 Ω·m Show Supplier Material materials with Electrical resistivity of 1.27E-6 Ω·m | |

1100.0 °C | 1.28E-6 Ω·m Show Supplier Material materials with Electrical resistivity of 1.28E-6 Ω·m | |

1200.0 °C | 1.29E-6 Ω·m Show Supplier Material materials with Electrical resistivity of 1.29E-6 Ω·m | |

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Magnetic

Property | Temperature | Value |
---|---|---|

Relative magnetic permeability | 23.0 °C | 1.01 [-] Show Supplier Material materials with Relative magnetic permeability of 1.01 [-] |

Chemical properties

Property | Value | Comment |
---|---|---|

Aluminium | 0.2 - 0.6 % Show Supplier Material materials with Aluminium of 0.2 - 0.6 % | |

Carbon | 0.06 - 0.1 % Show Supplier Material materials with Carbon of 0.06 - 0.1 % | |

Chromium | 19 - 21 % Show Supplier Material materials with Chromium of 19 - 21 % | |

Copper | 0.5 % Show Supplier Material materials with Copper of 0.5 % | max. |

Iron | 43 - 50 % Show Supplier Material materials with Iron of 43 - 50 % | |

Manganese | 0.5 - 1 % Show Supplier Material materials with Manganese of 0.5 - 1 % | |

Nickel | 30 - 32 % Show Supplier Material materials with Nickel of 30 - 32 % | |

Other | 0.7 % Show Supplier Material materials with Other of 0.7 % | max., Al+Ti |

Phosphorus | 0.02 % Show Supplier Material materials with Phosphorus of 0.02 % | max. |

Silicon | 0.2 - 0.6 % Show Supplier Material materials with Silicon of 0.2 - 0.6 % | |

Sulfur | 0.01 % Show Supplier Material materials with Sulfur of 0.01 % | max. |

Titanium | 0.2 - 0.6 % Show Supplier Material materials with Titanium of 0.2 - 0.6 % |

Technological properties

Property | ||
---|---|---|

Application areas | VDM® Alloy 800 H 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/ 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 H 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 H 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 H is excellent, so that the alloys can be used in the production of hydrogen and steam/hydrocarbon reformers. | |

General machinability | VDM® Alloy 800 H 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°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 H 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 H 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 H is an austenitic solid solution alloy which precipitates carbides and γ’ phase during high-temperature ageing. | |

Welding | For welding, VDM® Alloy 800 H 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. |