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Alloy Steel A335 Gr.P5 Pipe, also known as ASTM A335 P5, is a seamless ferritic alloy steel pipe that contains chromium and molybdenum as strengthening elements. These pipes are specifically designed for high-temperature and high-pressure service conditions. With their superior strength and excellent thermal stability, they are widely used in critical applications where durability and reliability are paramount.

The chemical composition of Alloy Steel A335 Gr.P5 includes chromium, molybdenum, carbon, manganese, silicon, and trace elements that provide enhanced mechanical properties. These elements ensure excellent resistance to oxidation, creep, and corrosion under elevated temperatures. Manufactured under strict ASTM/ASME standards, A335 P5 pipes meet global quality benchmarks, making them a trusted choice for demanding industries.

The chemical makeup of Alloy Steel A335 Gr.P5 pipes includes Chromium (4.00–6.00%), Molybdenum (0.45–0.65%), Carbon (≤0.15%), Manganese (0.30–0.60%), and small amounts of Phosphorus, Sulfur, and Silicon. This carefully balanced composition improves high-temperature strength and corrosion resistance while maintaining good weldability and formability.

A335 P5 alloy steel pipes exhibit excellent mechanical properties that make them ideal for heavy-duty and high-pressure environments. The pipes offer a minimum tensile strength of 415 MPa and a minimum yield strength of 205 MPa, with elongation typically around 30%. Their superior toughness and ductility make them reliable under thermal stress and cyclic loading conditions.

Alloy Steel A335 Gr.P5 Pipes and Tubes

Alloy Steel A335 Gr.P5 Pipe offers outstanding mechanical strength, tensile capacity, and toughness at elevated service conditions. The presence of molybdenum improves strength and hardenability, while chromium enhances oxidation resistance and high-temperature stability. This combination makes P5 pipes suitable for prolonged exposure to extreme environments without compromising structural integrity.

Due to their robust design and high-performance capabilities, Alloy Steel A335 Gr.P5 Pipes are extensively used in boilers, superheaters, heat exchangers, power generation plants, oil refineries, and petrochemical plants. These pipes are ideal for transporting steam, oil, and gas in critical conditions where both strength and thermal resistance are required. Their adaptability and reliability make them indispensable in the energy and process industries.

Alloy Steel A335 Gr.P5 pipes are produced using the seamless hot finishing process followed by heat treatment such as normalizing, quenching, and tempering. This process ensures a uniform microstructure and enhanced mechanical performance. The seamless nature of these pipes eliminates weld joints, which significantly reduces the risk of leakage and structural failure in high-pressure systems.

The chromium and molybdenum content in A335 Gr.P5 pipes contributes to excellent resistance to corrosion, oxidation, and scaling. These pipes perform exceptionally well in high-temperature environments, making them suitable for steam lines, power generation systems, and heat exchangers. The alloy also provides good resistance to carburization and sulfidation, ensuring a longer service life even under aggressive conditions.

Specification Table

Specification Details
Product Alloy Steel A335 Gr.P5 Seamless Pipe
Standard ASTM A335 / ASME SA335
Grade P5
Type Seamless, Hot Finished / Cold Drawn
Material Ferritic Alloy Steel (Chromium-Molybdenum)
Size Range 1/8” NB to 36” NB (Custom sizes on request)
Wall Thickness Schedule 20 to XXS, custom thickness available
End Finish Plain End (PE), Beveled End (BE), Threaded End (TE)
Applications Boilers, Superheaters, Heat Exchangers, Power Plants, Refineries, Petrochemicals

Chemical Composition (Typical ranges for SSS32760)

Note: Values are typical ranges. Final composition will be confirmed on MTC provided per lot.

Element Content (%)
Carbon (C) 0.15 max
Manganese (Mn) 0.30 – 0.60
Phosphorus (P) 0.025 max
Sulfur (S) 0.025 max
Silicon (Si) 0.50 max
Chromium (Cr) 4.00 – 6.00
Molybdenum (Mo) 0.45 – 0.65

Mechanical Properties (Typical)

Property Value
Tensile Strength 415 MPa (min)
Yield Strength 205 MPa (min)
Elongation 30% (min)
Hardness (Brinell) 163 HBW (max)

Equivalent Grades

Standard Equivalent Grade
ASTM / ASME A335 / SA335 P5
UNS K41545
DIN 10CrMo9-10
EN 12CrMo9-10
BS 3604 Gr.620-440
JIS STPA 25

Dimension & Weight Chart (Selected common sizes)

Below is a representative chart showing outside diameter, wall thickness, inside diameter, cross-sectional area of metal and calculated weight per metre (kg/m). Values are calculated using density = 7.93 g/cm³ and are for guidance — use actual MTC values for procurement & engineering.

NPS OD (in) OD (mm) WT SCH 40 (in) WT SCH 40 (mm) Weight SCH 40 (kg/m) WT SCH 80 (in) WT SCH 80 (mm) Weight SCH 80 (kg/m)
1/20.84021.340.1092.771.270.1473.731.62
3/41.05026.670.1132.871.680.1543.912.20
11.31533.400.1333.382.500.1794.553.24
1-1/41.66042.160.1403.563.390.1914.854.46
1-1/21.90048.260.1453.684.050.2005.085.41
22.37560.320.1543.915.440.2185.547.48
2-1/22.87573.020.2035.168.630.2767.0111.41
33.50088.900.2165.4911.290.3007.6215.27
44.500114.300.2376.0216.070.3378.5622.32
66.625168.270.2807.1128.270.43210.9742.57
88.625219.070.3228.1842.540.50012.7064.64
1010.750273.050.3659.2760.310.59315.0695.83
1212.750323.850.40610.3179.740.68717.45131.86

Types Of Alloy Steel A335 Gr.P5 Pipes and Tubes

Seamless Pipe

SS S32760 Seamless Pipe

Welded Pipe

SS S32760 Welded Pipe

ERW Pipe

SS S32760 ERW Pipe

EFW Pipe

SS S32760S EFW Pipe

Seamless Tube

Low Temperature Carbon Steel A333S Seamless Tube

Welded Tube

S32760H Super Duplex Steel Welded Tube

Capillary Tube

S32760 Super Duplex Steel Capillary Tube

Heat Exchanger Tubes

S32760H Super Duplex Steel Heat Exchanger Tubes

Frequently Asked Questions (FAQ)

What is Alloy Steel A335 Gr.P5 Pipe?

Alloy Steel A335 Gr.P5 Pipe is a seamless ferritic alloy-steel pipe intended for high-temperature service. It contains chromium and molybdenum, which provide excellent strength, hardness, and resistance to oxidation and corrosion at elevated temperatures.

What are the key applications of A335 Gr.P5 pipes?

These pipes are widely used in power plants, refineries, petrochemical plants, boiler systems, heat exchangers, and high-temperature piping systems requiring creep strength and oxidation resistance.

What are the available sizes and thicknesses?

A335 Gr.P5 pipes are available in nominal pipe sizes (NPS) ranging from 1/2” to 24” (and higher on request) with wall thicknesses according to schedules such as SCH 40, SCH 80, SCH 160, and XXS. Custom sizes can also be manufactured.

Pipes & Tubes Supplier

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