Alloy Steel Tubes

Alloy Steel Tube Specifications

ASTM A387 Grade 5 plates are chrome-molybdenum alloy steel plates supplied to ASTM and ASME standards for high-temperature pressure vessel applications.

Alloy Steel Tube Sizes

Alloy steel tubes are available in many sizes. Heat exchanger and boiler tubes (ASTM A213) range from 1/2" (12.7 mm) to 5" (127 mm) outside diameter, with wall thickness from 0.035" (0.89 mm) to 0.500" (12.7 mm). Standard lengths are 4 to 12 metres.

ASTM A519 mechanical tubing covers a larger range: 0.250" to 26.000" OD and 0.028" to 4.000" wall thickness. Common schedules include SCH 40, 80, 120 and 160. Custom sizes and cut lengths are available on request.

Alloy Steel Tube Price

In India, alloy steel prices typically fall within the ₹150 to ₹300 per kg, while internationally, costs are around $1 to $5 per kg. The final price varies depending on several factors, including specific grade, tube dimensions, order quantity, and surface finish. For commonly used Cr-Mo grades such as T11 and T22, prices are generally in the range of ₹150 to ₹200 per kg. Higher grades like T91 are usually priced between ₹200 and ₹300 per kg due to their increased alloy content and stricter production controls.

Alloy Steel Tube Grades

Alloy steel tubes are used where temperatures and pressures are high. They are strong, resist heat, and last a long time, so they are commonly used in power plants, refineries, and many industrial systems.

Grade T11 (1.25Cr-0.5Mo)

Grade T11 alloy steel tubes contain 1.00 to 1.50% chromium and 0.44 to 0.65% molybdenum. The grade handles continuous service up to approximately 565 °C (1050 °F). Boiler tubes, headers and steam piping in conventional power plants are the primary applications.

Grade T22 (2.25Cr-1Mo)

Grade T22 tube has higher chromium and molybdenum than T11, which allows use up to about 580 °Celsius. It is widely used in superheater tubes and high-temperature headers for better oxidation resistance.

Grade T91 (9Cr-1Mo-V)

ASTM A213 T91 tubes are a highly advanced chromium molybdenum vanadium alloy for boilers. Vanadium and niobium improve high-temperature strength, so they work reliably up to about 620 °C in superheater and reheater circuits of critical power plants.

Grade T5 (5Cr-0.5Mo)

ASTM A213 T5 alloy steel tubes are ideal for refinery heaters and high-sulphur service. With 4-6% chromium, they resist sulphidation and safely operate at temperatures up to about 595°C (1100°F).

Grade T9 Tubes

ASTM A213 T9 tubes contain approximately 8-10% chromium and 0.9-1.1% molybdenum, providing good high‑temperature strength and improved oxidation resistance over lower‑alloy grades. They are commonly used in boiler, superheater and heat exchanger service.

Types of Alloy Steel Tubes

Alloy steel tubes are available in three main forms, each suited to different pressure tolerance and cost requirements:

Seamless Alloy Steel Tubes

Welded Alloy Steel Tubes (ERW)

Drawn Over Mandrel (DOM) Alloy Tubing

Alloy Steel Tube Applications

Alloy steel tubes serve critical roles across power generation, oil & gas, and mechanical engineering sectors. The 3 primary application areas are listed below.

Alloy Steel Tubes vs Carbon Steel Tubes

The table below shows the main differences between alloy steel tubes and carbon steel tubes.

Alloy steel tubes are the correct selection when service temperatures exceed 400 °C or when sulphidation and oxidation resistance are required.

Shipping & Packaging

Heavy-duty wooden boxes Packing

Export Packaging Standard

We strictly follow seaworthy export handling standards to protect alloy steel tube from transit damage, moisture ingress, and surface contamination during long-distance dispatch.

• Heavy-duty wooden boxes with moisture barrier lining
• HDPE stretch film wrapping on all bundles
• Plastic end caps on threaded and plain-end pipes
• Silica gel desiccants to minimize moisture exposure
• ISPM-15 fumigated wooden packaging for export

Tube Bundle Yard Staging

Container End-Cap Protection

Wrapped Export-Ready Bundles

Frequently Asked Questions