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Introduction
BSI BS 3604-2 specifies
seamless and welded ferritic alloy steel pipes and tubes intended for pressure
purposes where high strength, elevated temperature performance, and reliable
mechanical properties are required. These alloy steel pipes and tubes are
designed to withstand high-pressure and high-temperature service while
providing excellent weldability, durability, and resistance to creep and
oxidation.
BS 3604-2 ferritic alloy
steel pipes and tubes are widely used in power generation plants, oil & gas
industries, petrochemical facilities, refineries, boilers, pressure vessels,
heat exchangers, process piping, and industrial engineering applications. Their
excellent mechanical properties and dependable performance make them suitable
for critical pressure systems operating under demanding service conditions.
The specification ensures
controlled chemical composition, superior mechanical properties, dimensional
accuracy, and high manufacturing quality for pressure piping applications.
Ladhani Metal Corporation is
a manufacturer, supplier, and exporter of BSI BS 3604-2 Ferritic Alloy Steel
Pipes & Tubes, supplying premium-quality alloy steel piping solutions for
power generation, petrochemical, refinery, and industrial engineering projects
worldwide.
Applicable Standard
Standard Specification: BSI
BS 3604-2
Organization: British
Standards Institution (BSI)
Title: Steel Pipes and Tubes
for Pressure Purposes – Part 2: Ferritic Alloy Steel
This specification covers
ferritic alloy steel pipes and tubes intended for pressure applications
requiring excellent strength, high-temperature performance, and long-term
reliability.
Forms of Supply
BSI BS 3604-2 products are
supplied in the following forms:
• Seamless Pipes
• Welded Pipes
• Seamless Tubes
• Welded Tubes
• Boiler Tubes
• Heat Exchanger Tubes
• Mechanical Tubes
• Pressure Pipes
• Custom Cut Lengths
• Fabrication-Ready Materials
Grades Covered Under BSI BS 3604-2
• Ferritic Alloy Steel Grades
as specified in BS 3604-2
Supply Condition
• Hot Finished
• Cold Finished
• Normalized Condition
• Normalized and Tempered Condition
• Annealed Condition
• Fabrication-Ready Condition
Surface Finish
• Mill Finish
• Black Finish
• Pickled Finish
• Shot Blasted Finish
• Protective Coated Finish
• Plain End Finish
Standard Sizes
Pipes & Tubes
Outside Diameter: 10.2 mm to
610 mm
Wall Thickness: 1.5 mm to 60
mm
Length: Up to 12 meters
Custom diameters, wall
thicknesses, lengths, and end preparations are available according to customer
requirements.
Chemical
Composition and Mechanical Properties at Room Temperature
|
Steel
Type |
Type
No. |
Carbon
(C) % |
Silicon
(Si) % |
Manganese
(Mn) % |
Phosphorus
(P), Max % |
Sulfur
(S), Max % |
Chromium
(Cr) % |
Molybdenum
(Mo) % |
Copper
Max % |
Nickel
Max % |
Others |
Tensile
Strength (Rm), Min |
Tensile
Strength (Rm), Max |
Yield
Strength (Re), Min |
Elongation
(A), Min % |
|
1% Chromium – 0.5% Molybdenum |
620 |
0.09–0.18 |
0.15–0.40 |
0.40–0.65 |
0.025 |
0.015 |
0.80–1.15 |
0.45–0.60 |
0.30 |
0.30 |
Al<sub>met</sub> 0.02 Max |
480 |
600 |
340 |
18 |
|
1.25% Chromium – 0.5% Molybdenum |
621 |
0.09–0.17 |
0.50–0.80 |
0.40–0.65 |
0.025 |
0.015 |
1.00–1.50 |
0.45–0.60 |
0.30 |
0.30 |
Al<sub>met</sub> 0.02 Max |
515 |
690 |
340 |
18 |
|
2.25% Chromium – 1% Molybdenum |
622 |
0.09–0.15 |
—–0.50 |
0.30–0.60 |
0.025 |
0.015 |
2.00–2.50 |
0.90–1.10 |
0.30 |
0.30 |
Al<sub>met</sub> 0.02 Max |
515 |
690 |
310 |
16 |
Notes
- Elements not listed in the
table shall not be intentionally added without purchaser approval, except
for heat-finishing purposes.
- Permitted product analysis
deviations are specified in Table 2.
- Steel type 620 complies with BS
1501-2:620.
- Steel type 621 complies with BS
1501-2:621.
- Steel type 622 complies with BS
1501-2:622/515.
- Where a maximum metallic
aluminum (Almet) of 0.02% is specified, the total aluminum minimum content
is deemed to satisfy the requirement provided it does not exceed the
specified maximum. In case of dispute, the metallic aluminum content shall
be determined.
- Re is the yield strength. For
acceptance purposes, either the upper yield strength (ReH) or the 0.5%
proof strength (Rt0.5) may be used.
- Rm is the tensile strength.
- A is the percentage elongation
after fracture on a gauge length of L₀ = 5.65 √S₀, where S₀ is the
original cross-sectional area of the gauge length.
Key Features of BSI BS 3604-2 Pipes & Tubes
• Excellent high-temperature
strength
• Good creep resistance
• Superior pressure resistance
• Excellent weldability
• Good oxidation resistance
• High dimensional accuracy
• Reliable mechanical properties
• Long service life
• Good toughness
• Suitable for high-pressure applications
Applications of BSI BS 3604-2 Pipes & Tubes
Power Generation Industry
• Boiler Tubes
• Steam Pipelines
• Superheater Tubes
• Economizer Systems
Oil & Gas Industry
• Process Piping
• Refineries
• Gas Processing Plants
• Pressure Systems
Petrochemical Industry
• Heat Exchangers
• Chemical Processing Equipment
• High-Temperature Piping
• Process Plants
Industrial Engineering
• Pressure Vessels
• Industrial Boilers
• Steam Distribution Systems
• Process Equipment
Energy Sector
• Thermal Power Plants
• Combined Cycle Plants
• Energy Processing Facilities
• Utility Pipelines
Heavy Engineering
• Structural Process Piping
• Industrial Installations
• Fabrication Projects
• Engineering Equipment
Fabrication and Welding
BSI BS 3604-2 ferritic alloy
steel pipes and tubes offer excellent fabrication and welding characteristics.
• Suitable for conventional
welding processes
• Good bending characteristics
• Excellent machinability
• Reliable welded joint performance
• Good dimensional stability
• Suitable for fabrication into pressure systems
Proper welding procedures
should be followed to maintain mechanical properties and pressure integrity.
Heat Treatment
BSI BS 3604-2 products are
supplied in suitable heat-treated conditions depending on the grade.
• Normalizing improves
toughness
• Tempering enhances mechanical properties
• Stress relieving minimizes fabrication stresses
• Controlled heat treatment ensures uniform performance
• Proper heat treatment improves long-term service reliability
Advantages of BSI BS 3604-2 Pipes & Tubes
• High mechanical strength
• Excellent pressure resistance
• Good high-temperature performance
• Superior weldability
• Long operational life
• Excellent creep resistance
• Reliable dimensional stability
• Low maintenance requirements
• Easy fabrication
• Cost-effective solution for pressure applications
Conclusion
BSI BS 3604-2 Ferritic Alloy
Steel Pipes & Tubes are engineered for pressure applications requiring high
strength, excellent weldability, and dependable performance under elevated
temperatures and pressures. These pipes and tubes are extensively used in power
generation, oil & gas, petrochemical, refinery, boiler, and industrial
processing applications where reliability and durability are essential.
Ladhani Metal Corporation
supplies BSI BS 3604-2 Ferritic Alloy Steel Pipes & Tubes in various sizes,
wall thicknesses, surface finishes, and customized dimensions, delivering
reliable piping solutions for pressure systems, power plants, refineries, and
industrial engineering projects worldwide.
FOR REQUIREMENT OF THIS GRADE
OR FOR DETAIL CONTACT US AT :-
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