Materials

Controlling other alloying elements such as iron and chromium

Alloy B2 should not be used at temperatures between 1000¡ãF and 1600¡ãF as the alloy forms secondary phases that could decrease the ductility of the material.

While it is a very useful metal, it is cost prohibitive in most applications. Monel 400 costs 5 to 10 times as much as regular nickel or copper.

Monel K500 has about three times the yield strength and twice the tensile strength of Monel 400, and higher mechanical properties can be obtained by cold working or age hardening. Monel K500 alloy has the same corrosion resistance as Monel 400 alloy.

Monel K500 alloy has the same corrosion resistance as Monel 400 alloy.

Generally, the corrosion resistance of Monel K500 in solid solution is basically the same as that of Monel 400 alloy, so the corrosion resistance data of Monel 400 can be applied to Monel K500 alloy. Due to its low corrosion rate and high strength in flowing seawater, the alloy is particularly suitable for manufacturing seawater corrosion-resistant centrifugal pump shafts.

Monelk500, also known as UNS N05500, has the same corrosion resistance as monel400, but has higher mechanical strength and hardness. It has good corrosion resistance and long-term organizational stability.

Monel k500 has good corrosion resistance and long-term organizational stability.

Adding a small amount of Mg to Monel K-500 alloy can increase the grain boundary bonding force and improve high temperature plasticity.

The high-temperature plasticity of the experimental alloy added with trace amounts of Mg, Cr and Co is obviously improved, and it exhibits certain superplasticity. At 1010¡æ, the strain rate sensitivity index m is 0.32, and the maximum elongation is 240%.

Using the fracture work theory calculation of impurity elements segregation at grain boundaries, it is shown that Mg, Cr and Co can improve the grain boundary bonding force of Ni-Cu alloy, so they can improve the high temperature plasticity of Monel K-500 alloy.

The deformation activation energy is low during superplastic deformation, and the process may be controlled by diffusion.

MonelK-500 alloy has a strong aging cracking tendency after large cold deformation. Cracks initiate on the surface and propagate towards the center. There are both transcrystalline and intercrystalline forms.

The superposition of residual stress caused by cold working and aging thermal stress, as well as the preferential embrittlement of the surface layer at the initial stage of aging, are the main reasons for aging cracking of Monel K500 alloy.

Monel K500 alloy has excellent corrosion resistance, and has higher strength and hardness than Monel 400. This is due to the addition of elements such as Al and Ti to the alloy, and after a certain heat treatment, there are dispersed intermetallic compounds on the substrate.

Alloy 800HT / Incoloy 800HT is a controlled composition derivative of INCOLOY alloy 800H (UNS N08810) and is used for the same creep resistant applications, however the combined effects of mechanical and thermal processing of the alloy permit higher design stresses to be incorporated than are permitted for the conventional alloy.

INCOLOY 800H is a controlled composition derivative of INCOLOY? alloy 800 (UNS N08800). Applications have extended from petrochemical processing reformer tubing, to bellows and flare tips in refinery service.

INCOLOY 800H is widely used in Power generation, superheater and reheater tubing have also employed the material. Heat treatment retorts, muffles jigs and fixtures have also used this material to great effect.

The combined effects of mechanical and thermal processing of Incoloy Alloy 800HT permit higher design stresses to be incorporated than are permitted for the conventional Alloy 800H.

Both materials remain available, subject to commercial considerations, and certain specifications which restrict the service temperature of some grades of INCOLOY alloy 800H.

Incoloy Alloy 800HT applications have extended from petrochemical processing reformer tubing, to bellows and flare tips in refinery service. In power generation, superheater and reheater tubing has also employed the material.

Alloy 800 is an iron-nickel-chromium alloy with moderate strength and good resistance to oxidation and carburization at elevated temperatures.

Alloy 800H is a solution heat treated (2100¡ãF/1150¡ãC), controlled-carbon version of alloy 800 with improved elevated temperature properties. It has improved creep and stress-rupture characteristics in the 1100¡ãF (593¡ãC) to 1800¡ãF (982¡ãC) temperature range.

Typical applications for alloy 800 and 800H are – Heat exchangers and process piping; carburizing fixtures and retorts; furnace components; electric range heating-element sheathing; extruded tubing for ethylene and steam methane reforming furnaces; ammonia effluent coolers.

The principle di?erence between alloys 800H and 800HT is the restricted aluminum and titanium content in 800HT, which results in higher creep and stress rupture properties.

Alloy 800H/800HT is frequently used in applications that involve long-term exposure to elevated temperatures where resistance to oxidation, carburization and other types of elevated temperature corrosion is required.

HT PIPE is a leading supplier of Alloy 800 and other high-quality special metal alloys with decades of experience and extensive specifications.

Incoloy 800 is an alloy whose primary constitution is made up of nickel, iron, and chromium. This particular alloy, unlike the former, has less than 50% nickel content in its chemical composition. Aside from their chemical makeup, the other points of distinction for both the alloys are their use in a specific set of applications or industries.

Alloy 800H/800HT is frequently used in applications that involve long-term exposure to elevated temperatures where resistance to oxidation, carburization and other types of elevated temperature corrosion is required.

Incoloy 800 is an alloy with a higher content of iron. Due to the alloy having a higher content of ferrous, and lower content of nickel, the cost of Inconel 800 becomes low.