ARK Stainless Inc. is a manufacturer, supplier and exporter of Carbon Steel Forged Fittings in India for high-pressure and general industrial piping systems. We supply forged fittings in commonly used carbon steel grades such as ASTM A105, A105N, A350 LF2 and ASTM A694 grades for applications where strength, pressure integrity and dependable service performance are important. Our range includes carbon steel socket weld fittings and threaded forged fittings used across refineries, oil and gas installations, petrochemical plants, power projects, water treatment systems and process piping lines.
Carbon steel forged fittings are widely used for branch connections, flow direction changes, end closures and pipe-to-pipe connections in small-bore piping systems. Compared with fabricated or lower-strength alternatives, forged fittings are preferred in many industrial applications because they offer better structural strength, good machinability, reliable sealing performance and suitability for high-pressure service. Depending on the project requirement, these fittings can be supplied for standard process service, low-temperature service and higher-pressure line applications.
We manufacture and supply a complete range of forged elbows, tees, couplings, unions, caps, plugs, bushings, crosses, swage nipples, pipe nipples and outlet fittings in socket weld and threaded configurations. These fittings are produced in accordance with applicable ASME, ASTM and MSS standards and are suitable for steam lines, oil lines, gas service, utility piping, fire protection systems, chemical transfer lines and other industrial process applications.
ASTM A105 forged fittings are commonly used in refinery, petrochemical and utility piping systems for ambient and elevated temperature service. ASTM A350 LF2 forged fittings are generally selected for low-temperature carbon steel piping where notch toughness at lower temperatures is required. ASTM A694 forged fittings are typically used for high-pressure transmission and line pipe applications, particularly in oil and gas projects where higher strength grades such as F42, F52, F60, F65 and F70 may be specified.
Our carbon steel forged fittings are available in threaded and socket weld forms in pressure classes such as 2000 lbs, 3000 lbs, 6000 lbs and 9000 lbs, depending on fitting type and end connection. We can also supply fittings with mill test certificates, heat number traceability, dimensional inspection reports and third-party inspection documentation where required for project approval and quality compliance.
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.30 - 0.60 |
| Manganese (Mn) | 0.60 - 1.20 |
| Phosphorus (P) | 0.04 max |
| Sulfur (S) | 0.05 max |
| Silicon (Si) | 0.10 - 0.35 |
| Chromium (Cr) | 0.30 - 0.60 |
| Nickel (Ni) | 0.40 max |
| Copper (Cu) | 0.40 max |
| Molybdenum (Mo) | 0.12 max |
| Property | Tensile Strength | Yield Strength | Elongation | Hardness | Impact Toughness | Modulus of Elasticity |
|---|---|---|---|---|---|---|
| Value | 70 - 100 ksi (485 - 690 MPa) | 30 ksi (205 MPa) min | 20% in 8 inches (200 mm) | HRB 95 max | 20 ft-lb (27 J) min at -20°F (-29°C) | 29,000 ksi (200 GPa) |
ASTM A105 Carbon Steel Forged Fittings are widely used in refinery, petrochemical, power and utility piping systems for ambient and moderately elevated temperature service. This is one of the most commonly specified forged carbon steel grades for small-bore high-pressure piping because it offers good strength, machinability and weldability for general industrial service.
ASTM A105 forged fittings are commonly supplied in the form of socket weld elbows, threaded tees, couplings, caps, plugs, unions and branch outlet fittings. They are used in steam, oil, water, compressed air and process piping lines where dependable pressure-containing forged fittings are required.
ASTM A105N Carbon Steel Forged Fittings are manufactured from normalised ASTM A105 material. The normalising treatment helps improve uniformity in the microstructure and can provide better toughness and consistency for certain service conditions. A105N forged fittings are selected where project specifications call for normalised carbon steel forged fittings rather than standard as-forged A105 material.
These fittings are used in refinery piping, chemical plants, thermal power stations and process systems where carbon steel forged fittings are required in accordance with customer or project material specifications.
ASTM A350 LF2 Carbon Steel Forged Fittings are used for low-temperature carbon steel piping systems where impact toughness at lower temperatures is an important requirement. LF2 is commonly specified for low-temperature service lines in oil and gas plants, LNG-related systems, process piping and utility applications where standard carbon steel grades may not be suitable.
ASTM A350 LF2 forged fittings are supplied in threaded and socket weld forms and are commonly used for condensate systems, low-temperature hydrocarbon service, process utility piping and outdoor installations exposed to lower ambient temperatures.
ASTM A694 Carbon Steel Forged Fittings are generally used in high-pressure transmission and line pipe applications where higher-strength carbon steel materials are required. Grades such as F42, F46, F52, F56, F60, F65 and F70 are commonly specified for oil and gas, pipeline and pressure service applications.
A694 forged fittings are selected when piping systems require a combination of forged construction, pressure capability and higher strength levels than standard carbon steel grades. These fittings are used in onshore and offshore oil and gas projects, transmission systems and process installations where the project specification calls for A694 material grades.
Carbon steel forged fittings are used across a wide range of industrial piping systems because they provide strong, compact and pressure-tight connections for small bore lines. The exact grade is usually selected according to operating temperature, pressure rating, service media and project specifications.
We manufacture and supply a complete range of carbon steel forged fittings for threaded and socket weld piping systems. The product range includes fittings used for directional changes, branch connections, end closures and line size transitions.
We also supply socket weld and threaded forms, such as:
The mechanical properties of carbon steel forged fittings vary according to the material grade, heat treatment condition and applicable specification. In general, forged carbon steel fittings are selected for their good tensile strength, pressure handling capability, toughness and service reliability in industrial piping applications.
ASTM A105 and A105N forged fittings are commonly used for general pressure piping because they offer a practical balance of strength, machinability and weldability. ASTM A350 LF2 forged fittings are preferred where low-temperature toughness is required. ASTM A694 forged fittings are used where higher strength grades are specified for line and pressure service.
Carbon steel forged fittings can be supplied in accordance with the following material and dimensional standards, depending on grade and application requirements.
Carbon steel forged fittings are available in standard pressure classes used for threaded and socket weld piping systems. The pressure class selected depends on the fitting design, end connection type, wall thickness and project requirements.
Socket weld forged fittings are generally used in permanently welded small bore piping systems where strong and compact joints are required. These fittings are commonly installed in steam lines, utility headers, hydrocarbon service piping, firewater systems and process lines operating at elevated pressure.
Threaded forged fittings are used where dismantling, maintenance or field assembly is easier with screwed connections. These fittings are common in utility piping, compressed air lines, fire protection systems, low to medium pressure service lines and smaller process connections.
ASTM A105, ASTM A105N, ASTM A350 LF2 and ASTM A694 are all carbon steel forging grades used for forged fittings, but they are selected for different service conditions and project requirements.
ASTM A105 forged fittings are commonly used for general carbon steel pressure piping applications. They are widely specified for refinery, petrochemical, utility and industrial piping systems operating at ambient or moderately elevated temperatures. ASTM A105 is one of the most common material grades for carbon steel socket weld and threaded forged fittings.
ASTM A105N forged fittings are produced from normalised ASTM A105 material. The normalising heat treatment helps provide improved microstructural uniformity and is often specified where the project or end user requires normalised forged fittings rather than standard A105 material. In practical terms, A105N is generally selected when additional material control or compliance with a specific project requirement is needed.
ASTM A350 LF2 forged fittings are intended for low-temperature service. This grade is commonly used where piping systems are exposed to lower operating or ambient temperatures and where impact toughness becomes more important than with standard carbon steel grades. LF2 forged fittings are often specified for oil and gas, LNG-related, utility and process piping systems operating in colder environments.
ASTM A694 forged fittings are generally used for higher-strength pressure and transmission line applications. Grades such as F42, F52, F60, F65 and F70 are selected where the piping system requires higher mechanical strength than standard ASTM A105 forged fittings. ASTM A694 forged fittings are commonly used in oil and gas, pipeline and high-pressure process applications.
ASTM A105 and A105N are usually chosen for general pressure piping, ASTM A350 LF2 is selected for low-temperature service, and ASTM A694 is used when higher-strength forged fittings are required for line pipe or pressure service applications.
ARK Stainless Inc. supplies Carbon Steel Forged Fittings in commonly specified grades such as ASTM A105, A105N, A350 LF2 and ASTM A694 for refinery, oil and gas, petrochemical, power and general industrial piping applications. We offer socket weld and threaded forged fittings in standard sizes and pressure classes, along with material test certificates, heat number traceability and inspection documentation where required. Our range supports both project supply requirements and replacement quantity enquiries for domestic and export markets.
Carbon steel forged fittings are inspected during and after manufacturing to verify material quality, dimensional accuracy and compliance with applicable specifications. Testing requirements may vary according to grade, project specification and end-use service conditions. Available inspection and testing procedures may include:
