Hastelloy X is a Fe-Ni-Cr-based solid-solution-strengthened deformed superalloy with moderate durability and creep strength at 900°C. It has good oxidation resistance and corrosion resistance, good cold and hot working formability and welding performance, suitable for making parts such as aero-engine combustion chambers that are used for a long time below 900 °C, and high temperature that can be used for a short time at a working temperature of 1080 °C. Components, mainly plates, strips, tubes, bars, forgings and castings.
Chromium Cr: 20.5-23.5
Carbon C: ≤0.05-0.15
Iron Fe: 17-20
Manganese Mn: ≤1.00
Nickel Ni: Balance
Silicon Si: ≤1.0
Molybdenum Mo: 8.0-10.0
Cobalt Co: ≤0.5-2.5
Aluminum Al: ≤0.1
Tungsten W: ≤0.2-1.0
Vanadium V: ≤0.35
Boron B: ≤0.005
Silicon Si: ≤1.0
Phosphorus P: ≤0.015
Sulfur S: ≤0.01
Hastelloy X features: excellent oxidation resistance up to 1200°C, good high temperature strength, good formability and weldability, good stress corrosion cracking resistance.
Density 8.3 g/cm3
Melting point 1260-1355 ℃
Tensile strength Rm N/mm2:730
Yield strength RP0.2N/mm2:283
Elongation A5 %:40
Hastelloy X welding: It can be welded by various welding processes, such as tungsten electrode inert gas shielded welding, plasma arc welding, manual sub-arc welding, metal shielded metal shielded welding, and molten shielded shielded gas welding. Pulse arc welding is preferred.
Before welding, the material needs to be in solution treatment state to remove oxide scale, oil stains and various marking marks, and the width of about 25mm on both sides of the welding seam needs to be polished to a bright metal surface. With low heat input, the interlayer temperature does not exceed 100°C. No need for pre-weld and post-weld heat treatment.
Application areas: Industrial and aviation steam turbines (combustors, rectifiers, structural covers).
Industrial furnace components, support rolls, grids, ribbons and radiant tubes, helical tubes in petrochemical furnaces, high temperature gas cooling nuclear reactors.
Hastelloy X alloy is an austenitic nickel-based alloy containing 47.5% nickel, 22% chromium and 18.5% iron, with small amounts of cobalt, molybdenum and tungsten, and has excellent oxidation resistance at high temperatures.
Hastelloy X alloys are solution strengthened for excellent strength at elevated temperatures. It has excellent high temperature and stress rupture properties at 790°C. It is suitable for use in applications with a temperature limit of approximately 1200°C. Hastelloy X has high levels of chromium, nickel and molybdenum for excellent corrosion resistance, similar to high nickel alloys in corrosion applications.
Hastelloy X is known for its high resistance to heat and oxidation, as well as excellent resistance to chloride stress corrosion cracking, as well as excellent resistance to reduction and carburization.Extremely resistant to stress corrosion cracking in petrochemical applications.
Hastelloy X has excellent forming and welding properties. It is malleable and easy to cold work due to its high ductility. The alloy has a work hardening rate similar to that of austenitic stainless steels and exhibits good machinability in annealed form. It can be welded by fusion welding and resistance welding procedures. Hastelloy X can be welded by manual and automatic methods such as shielded metal arc welding, gas tungsten arc welding and gas metal arc welding processes.
Hastelloy X Executive Standards:
AMS 5536 Plates, Strips and Plates
AMS 5754 Rods, Forgings and Rings
AMS 5390 Castings (Casting)
AMS 5798 Welding Wire (Cold Drawn)
AMS 5799 Coated Welding Electrodes
GE B50T83A sheet
GE B50A436A board, board
GE B50TF25A sheet
PWA 1038 Low Temperature Sheet Strip
ASTM B 435 Plates, Sheets and Strips
ASME SB-435 Plates, Sheets and Strips
ASTM B 619 Welded Pipe
ASME SB-619 Welded Pipe
ASTM B 622 SMLS Pipe
ASME SB-622 SMLS Pipe
ASTM B 626 Pipe
ASME SFA-5.14 ERNiCRrMo-2 welding wire