690 Tensile Strength Hastelloy Alloy C276 Nickel Alloy Tube For Heat Exchanger

                                        Manufacture Hastelloy C276 Nickel Alloy Tube for Heat Exchanger                   

1.Description:

Hastelloy C276 is a nickel-molybdenum-chromium high alloy with an inclusion of tungsten made to have outstanding corrosion protection in a wide array of critical environments. The superior nickel and also molybdenum contents make the nickel metal alloy particularly resistant to pitting or crevice rust in decreasing environments when chromium conveys level of resistance to oxidizing media. The lower carbon content reduces carbide precipitation during welding to sustain corrosion protection in as-welded structures. This nickel alloy is resistant against the composition of grain boundary precipitates in the weld heat-affected area, hence which makes it ideal for most chemical procedure application in an like welded condition.
Even though there are many different versions of the Hastelloy nickel alloy, Hastelloy C-276 is probably the most in-demand.
Alloy C-276 is popular in the nearly all severe environments for example chemical processing, pollution regulation, pulp or paper production, industrialized and also city waste treatment, and also restore of sour natural gas .

2.Features of Hastelloy C276
• Excellent rust resistance in decreasing environments
• Exceptional resistance to solid solutions of oxidizing salt, for instance ferric and also cupric chlorides
• High nickel as well as molybdenum contents offering superior corrosion resistance in decreasing environments

3.Machinability
The alloy is considered moderate to difficult to machine, but can be machined using conventional methods. The alloy has a high work hardening rate, and efficient machining requires rigid and overpowered machines, sharp tools, preferably carbide-tipped, and heavy, constant feeds.

4.Weldability

The alloy welds in a similar manner to C-22 alloy. Gas-tungsten-arc welding (GTAW) and shielded-metal-arc welding (SMAW) are commonly used to weld C-276 alloy.
It is recommended that the alloy be in the solution-annealed condition for welding, and that C-276 filler metal be used.
Submerged-arc-welding is not recommended for this alloy as there is high heat input with this method and slow cooling of the weld. Neither is Oxyacetylene welding recommended, due to the danger of carbon pickup in the weld.