Alloy steel pipes stock : High-quality Ready Inventory For Industrial Use

Alloy steel pipes, often called Chrome Moly pipes, are vital for industries requiring superior strength, corrosion resistance, and high-temperature performance.

Our Alloy Steel Pipes Stock offers an extensive inventory of high-quality alloy steel pipes ready for immediate delivery. These pipes are manufactured from premium alloy steels, designed to provide superior strength, durability, and corrosion resistance across a variety of industrial applications.

The stocked alloy steel pipes are suitable for demanding environments including petrochemical plants, power generation facilities, construction projects, and heavy machinery manufacturing. Their seamless or welded construction ensures high reliability and performance under high pressure and temperature conditions.

Our inventory includes a range of grades such as chrome-molybdenum steels, stainless alloys, and carbon-alloy blends, providing solutions tailored to specific application requirements. These pipes are rigorously tested to meet international standards including ASTM, ASME, and API, guaranteeing consistent quality and performance.

With flexible sizing options and various surface finishes, our alloy steel pipes stock can fulfill urgent procurement needs, reducing lead times and project delays. Whether you require pipes for industrial pipe protection, boiler systems, or other critical infrastructure, our stocked pipes provide reliable and cost-effective solutions.

Alloy steel pipes are manufactured by alloying steel with chromium, molybdenum, nickel, and other elements, significantly improving mechanical properties such as strength, toughness, wear and corrosion resistance, especially under high temperature and pressure.

Widely used in power plants, refineries, and petrochemical industries, specific grades like ASTM A335 P91 and P92 offer excellent creep strength and resistance to softening, making them suitable for the most demanding applications.

Available in a wide range of sizes and standards including ASTM A213 and ASTM A335, both seamless and welded, these pipes meet diverse industrial specifications.

Their recyclability, energy efficiency, and environmental compliance make alloy steel pipes a sustainable choice. Growing industrialization, especially in regions like China, drives increasing demand for these high-performance pipes.

Frequently Asked Questions

Alloy steel pipes are steel pipes alloyed with elements like chromium, molybdenum, and nickel to enhance their strength, corrosion resistance, and ability to withstand high temperatures.

They are commonly used in power generation, petrochemical plants, refineries, oil and gas industries, and chemical processing, especially where high temperature and pressure conditions exist.

Popular grades include ASTM A335 P91, P92, ASTM A213 T11, T22, and others designed to withstand elevated temperatures and corrosive environments.

Yes, alloy steel pipes are highly recyclable and support energy-efficient industrial applications, aligning with modern environmental standards.

Molybdenum enhances creep strength, improves resistance to softening at high temperatures, and increases corrosion resistance, making pipes more durable in harsh environments.

What are the grades of alloy steel?

Alloy steel pipes are categorized by both standards and grades, each designed for specific performance requirements and applications. Common standards include ASTM A335, A519, and A213, while grades like P5, P9, P11, P22, and P91 are frequently used within these standards.

Detailed Grades of Alloy Steel Pipes by Standard
Standard	Detailed Grades	Main Applications
ASTM A335 / ASME SA335	P1, P2, P5, P9, P11, P12, P15, P21, P22, P23, P24, P36, P91, P92, P122, P911	High-temperature pressure systems: power plants, refineries, and chemical plants
ASTM A213 / ASME SA213	T2, T5, T5b, T9, T11, T12, T17, T22, T23, T24, T91, T92, T122, T911	Boiler tubes, superheaters, and heat exchangers
ASTM A519	4130, 4135, 4140, 4145, 4150, 1020, 1026, 1330, 8620	Mechanical tubing, structural applications, automotive components
API 5L	A25, A, B, X42, X46, X52, X56, X60, X65, X70, X80, X100	Oil and gas transmission pipelines (onshore and offshore)
EN 10216‑2	13CrMo4-5, 10CrMo9-10, 12CrMo19-5, X10CrMoVNb9-1, X11CrMo5, 14MoV6-3, X20CrMoV12-1	European pressure vessels and high-temperature piping
GB / SH Standards	15CrMoG, 12Cr1MoVG, 10CrMo910, 12CrMo, 1Cr5Mo, WB36, 10Cr9Mo1VNb (equiv. T91)	Petrochemical, power generation, high-pressure boilers in Chinese systems

Alloy steel is made by combining carbon steel with one or several alloying elements, such as titanium, copper, chromium, aluminum, manganese, silicon, and nickel. This produces specific properties that are not found in standard carbon steel. Common alloy steel grades include 4130, 4140, 4340, and 8620 for their balance of characteristics like strength, toughness, machinability, and weldability.

Alloy steel pipes are made from carbon steel combined with alloying elements like chromium, molybdenum, nickel, or vanadium to improve strength, heat resistance, and corrosion performance—suitable for challenging industrial applications.

Common standards include ASTM A335/ASME SA335 (P1, P5, P9, P11, P22, P91, P92), ASTM A213 (T5, T9, T11, T22, T91), as well as EN 10216‑2 (e.g., 13CrMo4‑5).

They’re available as seamless, ERW, LSAW, SSAW, and CD pipes. Typical processes include hot or cold finishing, with precise control for pressure/temperature specifications.

Available diameters span 1/8″–42″ (OD ~6–1067 mm), wall thicknesses from schedule 20 to XXS or custom. Lengths include SRL, DRL, or fixed lengths up to 23m.

Surfaces may be epoxy-coated, varnished, oil-treated, galvanized, or shot-blasted. Inspection includes PMI, tensile, hardness, impact, flaring, flattening, hydrostatic, and NDT testing.

Widely used in power generation (boilers, superheaters), petrochemical plants, refineries, oil & gas pipelines, aerospace, and industrial machinery where heat, pressure, and corrosion demand superior performance.

Pipes are delivered in conditions such as cold-finished/hard (BK), cold-finished/soft (BKW), annealed (GBK), or normalized (NBK), with certificate and traceability of heat/furnace number.

Alloy steel pipes contain alloying elements that enhance their strength, hardness, and resistance to wear and corrosion. Carbon steel pipes, on the other hand, primarily consist of carbon and iron, making them more susceptible to corrosion and wear.

Selecting the right alloy steel pipe involves considering factors such as the operating temperature, pressure, corrosion environment, and mechanical stress. It's essential to consult with material experts and refer to relevant standards to ensure compatibility with your specific application.

Yes, alloy steel pipes are designed to withstand high temperatures and are commonly used in applications such as power plants, boilers, and heat exchangers, where elevated temperatures are prevalent.

Alloy Steel Pipe Industry Applications

Alloy steel pipes offer superior strength, temperature and corrosion resistance, making them ideal for demanding environments across energy, petrochemical, construction, and more.

Oil & Gas Industry

Used extensively in drilling, subsea and onshore pipelines for crude oil, natural gas, and refined products due to high strength and corrosion resistance.

Chemical & Petrochemical Plants

Ideal for transporting corrosive chemicals, high-pressure reactor feeds, and heat exchanger tubing where carbon steel fails.

Power & Utility Boilers

Used in high-temp boiler tubes, superheaters, reheaters, and steam piping; withstands extreme temperatures and pressures efficiently.

Construction & Infrastructure

Used as structural pipelines, piling tubes, and transport lines in high-rise buildings and bridges due to high structural strength.

Cryogenic & Low-Temperature Services

Suitable for transporting liquefied gases and cold media, where toughness and strength must endure sub-zero temperatures.

Energy & Environmental Efficiency

Alloy steel pipes are fully recyclable and support energy-efficient systems, aligning with green standards in modern industry.

Key Considerations

Service Conditions: Choose grade based on temperature, pressure, and fluid compatibility.
Fabrication & Welding: Follow proper heat treatment and filler materials to avoid cracking or weakening.
Inspection & Maintenance: Regular checks for corrosion, fatigue, wear — especially in high-stress environments.

Alloy steel pipes stock

15CrMoG alloy pipe

WB36 Seamless Pipe

ASTM A335 P9 Seamless Pipe

ASTM A333 Grade 6 Seamless Pipe

ASTM A335 P11 Pipe in stock

12Cr1MoVG Seamless Pipe

16Mn Seamless Steel Pipe

ASTM A335 P22 Pipe in stock

20G Seamless Steel Pipe

ASTM A335 P91 Seamless Pipe

ASTM A335 P5 Seamless Pipe

ASME SA213 T12 Seamless Tube

Pipeline Corrosion Protection