Alloy Steel Pipes

Pipes with higher percentages, than standard carbon steel pipes, of alloying elements as Molybdenum (Mo), Chromium (Cr), Nickel, etc. Actually, the ASTM A335 covers low-alloy steel pipes, i.e. pipes that have a total amount of alloying elements below 5%. The addition of higher percentages of alloying elements (example Nickel and Chromium) transforms the steel into higher alloys, like stainless steel, duplex, up to super-alloyed materials like Inconel, Hastelloy, Monel, etc. ASTM A335 alloy steel pipes fit ASTM A234 WPx series buttweld fittings (WP5, WP9, WP91) and    A182 forged fittings and flanges (A182 F5, F9, F11, F22, F91). All these materials have similar chemical and mechanical properties and can be joined or welded. Alloy steel pipes are used in the energy industry for high temperature and very low-temperature service (cryogenic), or for applications with very high pressures.

Molybdenum (Moly) increases the strength of the steel and its elastic limit, enhance the steel resistance to wear, its impact qualities, and the hardenability. It also improves the resistance to softening, makes chromium steel less prone to embrittlement and prevents pitting.

Chromium, a key element also for stainless steel alloys, prevents steel oxidation at elevated temperatures and increases the resistance of steel to corrosion. It enhances the tensile, yield, and hardness properties of low-alloy pipes at room temperatures.

Grades We Deal in:

ASTM A335 Gr. P5, P9, P11, P12, P22 & P91, ASTM A213  T5, T9, T11, T12, T22, T91, ASTM A691

Alloy Steel Grade P5 Seamless Pipes
Alloy Steel Grade T5 Seamless Tubing
ASTM A213 Alloy Steel Seamless Tubes
A335 Seamless Pipes 
ASTM A691 Alloy Steel EFW Pipes
A335 Alloy Steel Rectangular Seamless Pipes 
ASTM A213 Gr T9 Alloy Steel Rectangular Tubes
Grade P1 Alloy Steel Seamless Pipes 

ASTM A106

ASTM A106 seamless pressure pipe (also known as ASME SA106 pipe) is commonly used in the construction of oil and gas refineries, power plants, petrochemical plants, boilers, and ships where the piping must transport fluids and gases that exhibit higher temperatures and pressure levels. All forged ASTM A106 GR. B Carbon Steel Seamless Pipes should be solution annealed according to the heat treatment section to restore the ferrite – austenite equilibrium. The weld metallurgy of ASME SA 106 GR. B Carbon Steel Welded Pipes, as with other ferrite – austenitic stainless steels, has a ferrite structure during solidification. And when the weld metal temperature of ASTM A106 GR. B Carbon Steel EFW Pipes is in the 2100 Degree F to 2640 Degree F (1150 Degree C to 1450 Degree C) range, it is possible for the HAZ to increase its ferrite content. It is the cooling of the high temp ferrite of ASME SA 106 GR. B Carbon Steel ERW Pipes that allows retransformation into austenite, yielding a ferrite – austenite weld structure. Cooling rates of ASTM A106 GR. B Carbon Steel Round Pipes are extremely important as getting the weld area too hot, or using too much weld energy, leads to cooling rates being too slow, allowing the formation of embrittling sigma phase in the heat affected zone. Conversely, if not enough weld energy is used in ASME SA 106 GR. B Carbon Steel Square Pipes, then the cooling rates are too fast, leading to too much ferrite in the weld metal and a fragile weld joint.

Note:-

The minimum wall thickness at any point shall not be more than 12.5% under the nominal wall thickness specified. Weight of any length shall not vary more than 10% over and 3.5% under that specified. NOTE — NPS 4 and smaller — weighed in lots. Larger sizes shall be weighed separately by length.

Doshi Piping Products stocks a full range of A106 pipe (SA106 Pipe) in:

Grades B and C

NPS ¼” to 30” diameter

Schedules 20 through XXH

Wall Thickness beyond XXH, including:

– Up to 4” wall in 20” through 24” OD

– Up to 3” wall in 10” through 18” OD

– Up to 2” wall in 4” through 8” OD

CS A106 Pipes Application Industries

 Off-Shore Oil Drilling Companies

Power Generation

Petrochemicals

Gas Processing

Specialty Chemicals

Pharmaceuticals

Pharmaceutical Equipment

Chemical Equipment

Sea Water Equipment

Heat Exchangers

Condensers

Pulp and Paper Industry

Molybdenum (Moly) increases the strength of the steel and its elastic limit, enhance the steel resistance to wear, its impact qualities, and the hardenability. It also improves the resistance to softening, makes chromium steel less prone to embrittlement and prevents pitting.

Chromium, a key element also for stainless steel alloys, prevents steel oxidation at elevated temperatures and increases the resistance of steel to corrosion. It enhances the tensile, yield, and hardness properties of low-alloy pipes at room temperatures.

Tubes with higher percentages, than standard carbon steel pipes, of alloying elements as Molybdenum (Mo), Chromium (Cr), Nickel, etc.
Molybdenum (Moly) increases the strength of the steel and its elastic limit, enhance the steel resistance to wear, its impact qualities, and the hardenability. It also improves the resistance to softening, makes chromium steel less prone to embrittlement and prevents pitting.
Chromium, a key element also for stainless steel alloys, prevents steel oxidation at elevated temperatures and increases the resistance of steel to corrosion. It enhances the tensile, yield, and hardness properties of low-alloy pipes at room temperatures.

Alloy Steel Seamless Pipe A355 P9
Alloy Steel Astm A355 P9 Pipes
A355 P9 Alloy Steel Pipes
P9 Alloy Steel Pipe
Alloy Steel P9 Pipes