Helical Coil Metals

A D i v i s i o n o f P o w e r P l u s I n t e r n a t i o n a l..

We can engineer, design, size and manufacture your coils out of 24 different types of metals and alloys. Our shop carries the AMSE "U", "UM", "R" and NB certification stamps. We are a ASME Code Section VIII, Division 1 shop with the engineering and manufacturing capabilities to produce any type and size coil that you may need. Since 1983 we have built a strong reputation for providing high quality products at competitive pricing for a wide range of industries including Areospace, Boiler Repair, Chemicals, Electronics, Hospitals, Housing, Paper, Petroleum and pharmaceuticals. Below is a list of metals that we have the ability to manufacture coils with.

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M E T A L S W E O F F E R

Carbon Steel Coils
Carbon steel is steel where the main interstitial alloying constituent is carbon. As the carbon content rises, steel has the ability to become harder and stronger through heat treating.

304-L Stainless Steel Coils
304 is the standard "18/8" stainless; it is the most versatile and most widely used stainless steel, available in a wider range of products, forms and finishes than any other. Grade 304-L, the low carbon version of 304, does not require post-weld annealing and so is extensively used in heavy gauge components.

316-L Stainless Steel Coils
316-L has better overall corrosion resistant properties than Grade 304, particularly higher resistance to pitting and crevice corrosion in chloride environments. Grade 316L, the low carbon version of 316 and is immune from sensitisation . Thus it is extensively used in heavy gauge welded components.

317-L Stainless Steel Coils
Grade 317 stainless steel is a modified version of 316 stainless steel. It has high strength and corrosion resistance. Grade 317 stainless steel is tougher than 304 stainless steel. Grade 317 stainless steel can be welded using fusion and resistance methods. 317-L filler metal can be used to obtain good result.

321-L Stainless Steel Coils
321 has the basic austenitic 18/8 steel (Grade 304) stabilised by Titanium or Niobium. This grade is used because it is not sensitive to intergranular corrosion after heating. 321 is the grade of choice for applications in the temperature range of up to about 900°C, combining high strength, resistance to scaling and phase stability with resistance to subsequent aqueous corrosion.

Copper Coils
Copper and copper alloys are some of the most versatile engineering materials available. The combination of physical properties such as strength, conductivity, corrosion resistance, machinability and ductility make copper suitable for a wide range of applications.

Alloy 20 Coils
Alloy 20 is a nickel-chromium-molybdenum stainless steel alloy developed for applications involving sulfuric acid. Its corrosion resistance also finds other uses in the chemical, food, pharmaceutical, and plastics industries. Alloy 20 resists pitting and chloride ion corrosion and its copper content protects it from sulfuric acid. Alloy 20 is not a SS but a nickel alloy.

Inconel 600 Coils
Inconel 600 is a Nickel-Chromium alloy with good resistance to oxidation and corrosion at high temperatures. When heated, Inconel forms a thick, stable, passivating oxide layer protecting the surface from further attack. Inconel retains strength over a wide temperature range, attractive for high temperature applications. Inconel is often encountered in extreme environments.

Inconel 825 Coils
Inconel 825 is a Nickel-Iron-Chromium alloy with additions of Molybdenum and Copper. It has excellent resistance to both reducing and oxidising acids, to stress-corrosion cracking and to localised pitting and crevice corrosion. It is also especially resistant to sulphuric and phosphoric acids.

Monel 400
Monel 400 is a Nickel-Copper alloy with high strength and excellent corrosion resistance in a range of acidic and alkaline environments and especially suitable for reducing conditions. It also has good ductility and thermal conductivity.

Admiralty Coil
Admiralty brass contains 30% zinc, and 1% tin which inhibits dezincification in many environments. Brass has higher malleability than bronze or zinc.

Hastelloy C Coils
Hastelloy C-276 is a Nickel-Molybdenum-Chromium alloy with the addition of Tungsten, has excellent corrosion resistance in a wide range of corrosive media and is especially resistant to pitting and crevice corrosion. Used in any environment that requires resistance to heat and corrosion but where the mechanical properties of the metal must be retained.

Hastelloy B Coils
Hastelloy B is a wrought nickel-molybdenum alloy that can be used in the ‘as welded’ condition. This alloy has excellent resistance to all temperatures and concentrations of hydrochloric acid. Additionally, it has good stress corrosion cracking and pitting resistance as well. However, due to the presence of high molybdenum content, this alloy is expensive.

Titanium Coils
Titanium alloys are metals which contain a mixture of titanium and other chemical elements. Such alloys have very high tensile strength and toughness (even at extreme temperatures). They are light weight, have extraordinary corrosion resistance and the ability to withstand extreme temperatures.

Aluminum Coils
Aluminum properties include good appearance, ease of fabrication, good corrosion resistance, low density, high strength-to-weight ratio and high fracture toughness. Aluminum has a density around one-third that of steel or copper, making it one of the lightest commercially available metals.

Nickel 90/10 Coils
Copper-nickel alloy with an alpha phase structure. Small amounts of iron and manganese are added to improve corrosion resistance in high-velocity (from 1 to about 3.5 m/s) waters,
including seawater. The alloy is relatively insensitive to stress corrosion. It has good cold- and hot- working properties and is readily weldable.

Nickel 70/30 Coils
The 70/30 copper nickel alloys have great resistance to sea water-related corrosion due to the presence of significant amounts of manganese and iron. Their high oxidation resistance is seen in moist air and steam. These alloys are thermally stable and possess moderate strength even when the temperature is high. The corrosion resistance and strength of these alloys are improved by the addition of manganese, iron, niobium, and or chromium.

Nickel 80/20
The 80/20 Copper-nickel alloys have very good resistance to biofouling and marine corrosion, and possess good fabricability. Copper gains more strength and corrosion resistance when nickel is added to it.

Nickel 200 Coils
Nickel with good mechanical properties over a wide range of temperature and excellent resistance to many corrosives, in particular hydroxides. Good resistance to corrosion in acids and alkalis and is most useful under reducing conditions. Outstanding resistance to caustic alkalis. In acid, alkaline and neutral salt solutions the material shows good resistance, but in oxidizing salt solutions severe attack will occur.

Duplex 2205
Duplex 2205 stainless is a mixed microstructure of austenite and ferrite (50/50) which has improved strength over ferritic and austenitic steel grades with similar corrosion resistance qualities. 2205 is the most common duplex alloy which contains 22% chromium and 5% nickel. Greater tensile and yield strength with similar corrosion resistance to type 304 stainless.

Duplex 2507
SuperDuplex stainless like Duplex, is a mixed microstructure of austenite and ferrite (50/50) which has improved strength over ferritic and austenitic steel grades. The main difference is that Superduplex has a higher Molybdenum and Chromium content which gives the material greater corrosion resistance.

AL 6X N Coils
AL-6XN alloy is a superaustenitic stainless steel. It exhibits far greater resistance to chloride pitting, crevice corrosion and stress corrosion cracking. The high nickel and molybdenum contents of the AL-6XN alloy give it good resistance to chloride stress-corrosion cracking. This metal is commonly used in high temperature and low ph applications in food processing.

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