Hastelloy, Inconel And Carbon Steel Welding
Hastelloy Welding Techniques
Hastelloy welding service can be welded by any of the following methods:
- Metallic – arc
- Inert – gas – shielded arc
- Submerged – melt
The registered trademark name, Hastelloy, is applied as the prefix name to more than twenty diverse highly oxidization resistant metal alloys produced by Haynes International, Inc. These high-performance alloys or superalloys developed by Haynes International are nickel – based steel alloys that exhibit a trait that includes
- Ease of welding and fabrication
- Localized corrosion/oxidation resistance
- High resistance to uniform attack
- Stress corrosion cracking resistance
Alloys of the same chemical and mechanical properties are available from other companies and offer excellent alternatives to the various Hastelloy brand alloys. The corrosion – resistant superalloys are widely used by the following sectors:
- Marine industries
- Industrial gas turbine
- Chemical processing,
Due to their steadfast performance, areas of energy, oil and gas, pharmaceutical and flue gas desulfurization health and environmental trades are gradually using them.
The welding characteristics of rust resistant nickel – based alloys are parallel in many ways to those of the austenitic stainless steels. They should present no special welding problems if proper practices and procedures are followed.
Inconel is resistant to corrosion. It’s used for high-heat situations with moisture or water. Inconel welding and fabrication have unique characteristics to consider. When you are welding an Inconel alloy, you have to use Inconel filler metal. This is normally the easiest Inconel alloy to seal and is effective when two Inconel pieces need to be welded together.
You can also use Inconel 625 to weld other metals that are unlike in terms of composition, such as stainless steel. When using Inconel to weld it is communal for the weld pool to be poorly defined. Inconel fillers tend to leave a skin like a film on the exterior of the weld pool and are dirty in appearance.
If this occurs there is no need to worry as this is a common side effect of Inconel welding. Inconel creates strong welds which are highly resistant to decay. Here are some of its characteristics:
- High resistance to oxidation at elevated temperatures
- Almost completely free from chloride-induced stress corrosion cracking
- Excellent mechanical properties at both extremely low and extremely high temperatures
- Outstanding resistance to pitting, crevice corrosion, and intercrystalline corrosion
- Good resistance to acids, such as sulfuric, phosphoric, nitric, and hydrochloric
Inconel Alloy Applications
- Nuclear reactors
- Pollution control equipment
- Flare stacks on offshore oil platforms
- Chemical and petrochemical processing
- Gas turbines, rocket motors/engines, and space craft
- Components where exposure to high mechanical stress and sea water are required
Carbon Steel Welding
This type of welding can be classified into three: low, medium and high carbon steels
Low carbon steel. Low carbon steels are soft, malleable, can be rolled, punched, sheared, and worked when either hot or cold. They can be machined and are readily welded. Steel gives off sparks when heated and solidifies almost instantly. Low carbon steels can be easily welded with any of the:
- Resistance welding processes
Medium carbon steels. These steels may be heat treated after construction and used for general machining and building of parts which require surface hardness and strength. They are manufactured in bar form and in the cold rolled or the normalized and galvanized condition.
During the welding process, the weld zone will become hardened if cooled rapidly and must be stress relieved afterward. These types of carbon steels may be welded with any of the arc, gas, and resistance welding processes. Medium carbon steels are better welded by the metal – arc process with mild steel shielded arc electrodes.
High carbon steels. High carbon steels frequently produce a very fine grained fracture, whiter than low carbon steels. Tool steel is harder and stiffer than plate steel or other low carbon material. High carbon steel can be solidified by heating to a good red and quenching in water. In contrast, the following can’t be hardened:
- Low carbon steel
- Steel castings
- Wrought iron
Molten high carbon steel is brighter than low carbon steel, and the melting surface has a cellular form. It sparks more freely than low carbon (mild) steel, and also, another distinct feature, the sparks are whiter. These steels are used in the of production tools which are heat treated after the manufacturing process to develop the hard structure necessary to be able to endure the high shear stress and wear.
There are multiple carbon steel welding companies who may offer you with different ways that we can but still our own can offer you the very best practice that we have in store. Some of our clienteles that need special metals welding would include:
- Water Heaters
- Insulation refractory plants
- Fat rendering plants
- Heat exchangers
- Tube bundles
Special metals welding require a high detailed skill considering the type of work that it is entailed with. With this, you deserve nothing but the best. Our services are good enough which and are also done in no time.
What Sets Us Apart
The service that we offer you is unique from the other competitors because:
- Our welders are extremely talented
- We have extensive specialty welding experience
- We have years of experience and history, giving our customers exactly what they need
- Our welders are certified
- Any of our welders that would be welding on one of these specialty welding projects would be an x-ray welder, and their work would pass an x-ray test
Given the qualities that we have for our welders, aside from offering a budget – friendly cost, we assure to leave you with a top quality service. The experiences that our welders possess are extensive enough for them to perform the given task.
Our specialty machine brands are completely customized which depends on the needs of the customer. We make sure that we give them our best and even surpass their expectations.