• One of the largest manufacturer and supplier of alloy steel large diameter seamless and welded pipes in India. All our tubes are 100% quality tested, which include chemical testing, mechanical testing as well as hydro testing. All alloy steel large diameter pipes are heat treated, solution annealed, and pass hydrostatic test and ultrasonic test. Each alloy steel large diameter pipe of our range is quality checked by our quality team on every stage of production to deliver the clients defect free best quality products.
  • Metallica is a private enterprise for manufacturing steel pipe products such as square pipes, rectangular pipes, pre-galvanized square pipe, round pipe, erw steel pipe, spiral steel pipe, and hot dipped galvanized steel pipe in India. We manufacture and supply alloy steel pipes and tubes for critical applications in industries like oil & gas, aviation, aerospace, petrochemicalnatural gas, paper making, industrial gas, heat exchange and others. We are manufacturers, stockholder and suppliers of large diameter alloy steel pipes in various standards.
  • All our alloy steel large diameter pipes and tube products are supplied with 3.1 specific test certificates, according to EN 10204. Certification according to 3.2 can be agreed at the time of ordering. Metallica makes it easy for you to source top quality alloy steel large diameter pipes at the lowest prices in India. We specialize in providing deliveries to your factory directly from our warehouse or our principal suppliers.
Large Diameter Alloy Steel Pipe Manufacturer, Wholesaler, Dealer, Supplier and Distributor In India and Abroad
  • As one of the largest manufacturer of large diameter Alloy Steel pipes, we have over 6000 tons in stock

  • Alloy Steel Large Diameter Pipes Available at around Rs. 240/KG for Sale in India.

  • Our Annual Sales Volume for Alloy Steel Pipes is Over 25,000 tons in India and Overseas.

  • Alloy Steel Pipes, are Sold with Complete Range of Related Pipe Fittings and Flanges

  • On-Time Delivery with Quality Assurance and Price Guarantee for Steel Pipes

Types of Large Diameter Alloy Steel Pipes & Tubes – Seamless/Welded

Standard Description
ASTM A179/A179M Seamless cold drawn low alloy steel heat exchanger and condenser tubes.
API 5L Line pipe.
ASTM A53M Black & Zinc Coated Welded and Seamless Steel Pipe.
ASTM A106M Seamless carbon steel pipe for high temperature service.
ASTM A105M Carbon steel forgings for piping applications.
ASTM A234M Piping fittings of wrought carbon steel and alloy steel for moderate and high temperature service.
ASTM 3799 Steel pipe fittings, screwed and socket weldability for the petroleum industry.
AS 1163 Structural steel hollow sections
AS 1074 Steel tubes and tubulars for ordinary service
BS13872 Screwed and socketed steel tube and tubulars
EN10241 Steel threaded pipe fittings

Some More Products that Metallica offers:-

Specification Grade Steel Type Manufacturing
A53 / SA53 B Carbon Seamless
Standard Specification for Welded
and Seamless Pipe – Black or Galvanized,
Plain-End or Threaded and Coupled
A106 / SA106 B/C Carbon Seamless Seamless Carbon Steel Pipe
for High Temperature Service
A333 / SA333 1/6 Carbon Seamless Seamless Steel Pipe
for Low Temperature Service
A335 / SA335 P5, P9, P11
P22, P91
Alloy Seamless Seamless Ferritic Alloy-Steel Pipe
for High Temperature Service
API 5L Gr. B, X42,
X52, X60, X65
Carbon Seamless
Seamless and Welded Line Pipe
A513 / SA513
Type 5 (DOM)
1018 – 1026 Carbon
Welded ERW Carbon and Alloy Steel
Mechanical Tubing
A519 1026, 4130
4140, 4142
Seamless Seamless Carbon and Alloy Steel
Mechanical Tubing
A671 / SA671 Plate Grades Carbon
Rolled & Welded Electric Fusion Welded Steel Pipe for
Atmospheric and Lower Temperatures
A672 / SA672 Plate Grades Carbon
Rolled & Welded Electric Fusion Welded Steel Pipe for
High Pressure Service at Moderate
A691 / SA691 Plate Grades Carbon
Rolled & Welded Electric Fusion Welded Steel Pipe for
High Pressure Service at High
A213 / SA213 T5, T9, T11,
T22. T91304, 310, 316,
321, 347 (L&H)
AlloyStainless Seamless Seamless Ferritic and Austenitic
Alloy-Steel Boiler, Superheater and
Heat-Exchanger Tubes
A312 / SA312 304, 310, 316,
321, 347 (L&H)
 Stainless Seamless
Seamless, Welded and Heavily Cold Worked
Austenitic Stainless Steel Pipes

Production & Supply Range for Large Diameter Steel Pipes

Product Large Diameter Carbon Steel Pipe – Seamless and Welded Pipe
Pipe Standards and Grades SA53 / A53 Welded — Grade B
API 5L Welded — Grades B (X42, X52, X60, X65 and X70) PSL 1, PSL 2
A671 / A672 in all grades
Typical Size Range ERW: 3/4″ thru 26″ up to 1.000″ thick
DSAW: 20″ thru 72″ up to 3.000″ thick
R&W: 24″ thru 120″ up to 4.000″ thick
Applications – Transporting water and sewage
– Oil and gas industries
– Boiler and condenser tubes
– High-pressure applications
– Chemical processing
Technology Hot Rolled, Cold Drawn, Extruded, Cold Finished, Heat Treated
Finish Annealed & pickled, Bright Annealing, Polished
Markings Heat Number, Size, Grade, Manufacturing Spec., Commodity Name or as per customer request
Testing & Inspections Chemical Component Analysis, Mechanical Properties (Ultimate tensile strength, Yield strength, Elongation), Technical Properties (Flattening Test, Bending Test,  Hardness Test, Impact Test), Exterior Size Inspection, Hydrostatic Test, NDT TEST ( ET TEST, UT TEST), Third Party Inspection
Pipe Ends Square Ends (straight cut, saw cut, and torch cut), or Beveled for welding
Packing Plastic Plugs in Both Ends, Hexagonal Bundles of Max. 2,000kg with Several Steel Strips, Plastic End Caps

Chemical Composition of Alloy Steel Large Diameter Pipes & Tubes A335 P11

UNS Designation
Other Elements

Mechanical Properties of ASTM A335 P11

Tensile strength, min, (MPa)
415 Mpa
Yield strength, min, (MPa)
205 Mpa
Elongation, min, (%), L/T

Difference Between Seamless and Welded Alloy Steel Pipe. How to Identify Whether a Pipe is Seamless or Welded?

Electric Resistance Welding (ERW) pipe is manufactured by rolling metal and then welding it longitudinally across its length. Seamless pipe is manufactured by extruding the metal to the desired length; therefore ERW pipe have a welded joint in its cross-section, while seamless pipe does not have any joint in its cross-section through-out its length.

In Seamless pipe, there are no welding or joints and is manufactured from solid round billets. The seamless pipe is finished to dimensional and wall thickness specifications in sizes from 1/8 inch to 26 inch OD. Applicable in for High-pressure applications such as Hydrocarbon Industries & Refineries, Oil & Gas Exploration & Drilling, Oil & Gas Transportation and Air and Hydraulic cylinders, Bearings, Boilers, Automobiles, etc.

ERW (Electric Resistance Welded) pipes are welded longitudinally, manufactured from Strip / Coil and can be manufactured upto 24” OD. ERW pipe cold formed from a ribbon of steel pulled through a series of rollers and formed into a tube which is fused through a electric charge. It is mainly used for low/ medium pressure applications such as transportation of water / oil. Common sizes for ERW Steel Pipe range from 2 3/8 inch OD to 24 inch OD in a variety of lengths to over 100 feet. Surface finishes are available in bare and coated formats and processing can be handled on site to customer specifications.

How to identify whether the pipe is seamless or welded?

If it is ASTM A53,

Type S means seamless.
Type F is furnace but welded,
Type E is Electrical resist welded.
That is how. It is the easiest way to identify whether pipe is Seamless or ERW.

Effects of Alloying Elements on Steel

•Manganese – strength and hardness; decreases ductility and weldability; effects hardenability of steel.
•Phosphorus – increases strength and hardness and decreases ductility and notch impact toughness of steel.
•Sulfur decreases ductility and notch impact toughness Weldability decreases. Found in the form of sulfide inclusions.
•Silicon – one of the principal deoxidizers used in steel making. In low-carbon steels, silicon is generally detrimental to surface quality.
•Copper – detrimental to hot-working steels; beneficial to corrosion resistance (Cu>0.20%).
•Nickel – ferrite strengthener; increases the hardenability and impact strength of steels.
•Molybdenum –  increases the hardenability; enhances the creep resistance of low-alloy steels.

What are the Steel Pipe Sizes?

Steel pipe sizes

Pipe size is quoted as a “Nominal Pipe Size” or NPS. The origin of the NPS numbers for smaller pipes (< NPS 12) is different to the origin for larger diameter pipes. However, all pipes of a specific NPS number have the same external or outer diameter (OD). The internal diameter will vary depending on the wall thickness of the metal. The reason for this is so that the same structural supports can be used for all piping of a specific NPS number regardless of the wall thickness.


Steel pipe schedules are a way to describe the wall thickness of the pipe. This is a critical parameter as it is directly related to the strength of the pipe and the suitability for specific applications. A pipe schedule is a dimensionless number and is calculated based on the design formula for wall thickness, given the design pressure and allowable stress.

Examples of schedule numbers are as follows: 5, 5S, 10, 20, 30, 40, 50, 60, 80, 100, 120, 140, 160, STD, XS, and XXS—with the most common being schedules 40 and 80. As the schedule number increases, the wall thickness of the pipe increases. The schedule number of a pipe therefore defines the internal diameter, as the OD is fixed by the NPS number.

Over 10000 Tons in Stock for Alloy Steel Pipes!

ISMT & Jindal Steel Pipes Dealers, Original MTR's Provided with All Materials

As one of the biggest alloy steel pipe stockholder and supplier in India, Metallica carries inventory of over 10,000 tons in its warehouses in Mumbai, Maharashtra India. We sell our alloy steel pipe products throughout India, and to international clients. We can supply our alloy steel tube products not only in industry-standard lengths and diameters, but also in custom length and diameters.

How are Steel Pipes Certified?

Certification of Steel Pipes

Manufacturers issue a Material Test Report or Mill Test Report to validate that the product meets the chemical analysis and mechanical properties specification. The MTR will contain all relevant data to the product and will accompany the product through its lifecycle.

The following are typical parameters that may be recorded on an MTR:

  • Chemical composition including carbon content, alloys, and sulfur
  • Material size, weight, identification, and grade
  • Material heat number, which ties back to the processing batch
  • Mechanical properties like tensile strength, yield strength, and elongation

At Metallica, we will Provide you with Original MTR’s for all Alloy Steel Pipe Products! We will Send Our Test Certificates, along with Quotation