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Introduction
ASTM A736 / A736M covers pressure vessel steel plates manufactured for welded pressure vessels, boilers, heat exchangers, reactors, storage tanks, and other pressure-retaining equipment requiring high strength, excellent toughness, superior weldability, and dependable performance under elevated pressure and temperature service conditions. These steel plates are produced under controlled manufacturing processes to ensure consistent mechanical properties, structural integrity, and long service life.
ASTM A736 / A736M pressure vessel plates are widely used in petrochemical plants, oil and gas facilities, refineries, power generation stations, fertilizer plants, chemical processing industries, industrial boilers, and heavy engineering projects. Their excellent fabrication characteristics and reliable mechanical performance make them suitable for critical pressure-containing applications.
The specification provides pressure vessel plates with controlled chemical composition, excellent dimensional accuracy, superior weldability, and dependable service performance for demanding industrial environments.
Ladhani Metal Corporation is a manufacturer, supplier, and exporter of ASTM A736 / A736M Pressure Vessel Plates, supplying premium-quality steel plates for pressure vessel, boiler, and industrial engineering applications worldwide.
Applicable
Standard
Standard Specification: ASTM A736 / A736M
Organization: ASTM International
Title: Standard Specification for Pressure Vessel Plates
This specification covers steel plates intended for the fabrication of welded pressure vessels, boilers, and pressure-retaining equipment requiring dependable mechanical properties and excellent weldability.
Forms of Supply
ASTM A736 / A736M steel products are supplied in the following forms:
• Pressure vessel plates
• Boiler quality steel plates
• Heavy thickness plates
• Hot rolled plates
• Heat-treated plates
• Cut-to-length plates
• CNC-cut plates
• Flame-cut plates
• Fabrication-ready plates
• Engineering steel plates
• Industrial steel plates
• Custom-sized plates
Grades Covered
Under ASTM A736 / A736M
• Grade A
• Grade C
Supply Condition
• Hot rolled
• Normalized
• Quenched and tempered (when specified)
• Stress relieved
• Fabrication-ready condition
Surface Finish
• Mill finish
• Shot blasted finish
• Pickled finish
• Ground finish
• Machined finish (when specified)
Standard Sizes
Plates
Thickness: 6 mm to 200 mm
Width: 1000 mm to 3500 mm
Length: Up to 12000 mm
Custom dimensions, flame-cut components, and machined plates are available according to customer requirements.
Chemical
Composition of ASTM A736 / A736M
|
Element |
Analysis |
Grade A (%) |
Grade C (%) |
|
Carbon,
max |
Heat
analysis |
0.07 |
0.07 |
|
Product
analysis |
0.09 |
0.09 |
|
|
Manganese |
Heat
analysis |
0.40–0.70 |
1.30–1.65 |
|
Product
analysis |
0.35–0.78 |
1.21–1.77 |
|
|
Phosphorus,
max |
Heat
analysis |
0.025 |
0.025 |
|
Sulfur,
max |
Heat
analysis |
0.025 |
0.025 |
|
Silicon,
max |
Heat
analysis |
0.40 |
0.40 |
|
Product
analysis |
0.45 |
0.45 |
|
|
Chromium |
Heat
analysis |
0.60–0.90 |
— |
|
Product
analysis |
0.56–0.94 |
— |
|
|
Nickel |
Heat
analysis |
0.70–1.00 |
0.70–1.00 |
|
Product
analysis |
0.67–1.03 |
0.67–1.03 |
|
|
Molybdenum |
Heat
analysis |
0.15–0.25 |
0.15–0.25 |
|
Product
analysis |
0.12–0.28 |
0.12–0.28 |
|
|
Copper |
Heat
analysis |
1.00–1.30 |
1.00–1.30 |
|
Product
analysis |
0.95–1.35 |
0.95–1.35 |
|
|
Columbium,
min |
Heat
analysis |
0.02 |
0.02 |
|
Product analysis |
0.01 |
0.01 |
Tensile
Requirements and Mechanical Properties
|
Mechanical
Property |
Grade A Class
1, ksi [MPa] |
Grade A Class
2, ksi [MPa] |
Grade A Class
3, ksi [MPa] |
Grade C Class
1, ksi [MPa] |
Grade C Class
3, ksi [MPa] |
|
Yield Strength, min |
|||||
|
3/4 in.
and under [20 mm and under] |
80
[550] |
65
[450] |
75
[515] |
90
[620] |
85
[585] |
|
Over
3/4 to 1 in., incl. [Over 20 to 25 mm, incl.] |
— |
65
[450] |
75
[515] |
— |
80
[550] |
|
Over 1
to 2 in., incl. [Over 25 to 50 mm, incl.] |
— |
60
[415] |
75
[515] |
— |
80
[550] |
|
Over 2
to 4 in., incl. [Over 50 to 100 mm, incl.] |
— |
55
[380] |
65
[450] |
— |
— |
|
Over 4
in. [Over 100 mm] |
— |
50
[345] |
60
[415] |
— |
— |
|
Tensile Strength |
|||||
|
3/4
in. and under [20 mm and under] |
90–110
[620–760] |
72–92
[495–635] |
85–105
[585–725] |
100–120
[690–825] |
95–115
[655–795] |
|
Over
3/4 to 1 in., incl. [Over 20 to 25 mm, incl.] |
— |
72–92
[495–635] |
85–105
[585–725] |
— |
90–110
[620–760] |
|
Over 1
to 2 in., incl. [Over 25 to 50 mm, incl.] |
— |
72–92
[495–635] |
85–105
[585–725] |
— |
90–110
[620–760] |
|
Over 2
to 4 in., incl. [Over 50 to 100 mm, incl.] |
— |
65–85
[450–585] |
75–95
[515–655] |
— |
— |
|
Over 4
in. [Over 100 mm] |
— |
60–80
[415–550] |
70–90
[485–620] |
— |
— |
|
Elongation in 2 in. [50 mm], min, % |
20 |
20 |
20 |
20 |
20 |
Mechanical property requirements vary according to the specified grade, plate thickness, and supply condition.
Key Features of
ASTM A736 / A736M Plates
• High mechanical strength
• Excellent pressure resistance
• Superior weldability
• Outstanding toughness
• Excellent fabrication characteristics
• Good dimensional stability
• Reliable elevated temperature performance
• Long operational service life
• Suitable for critical pressure equipment
• Consistent mechanical performance
Applications of
ASTM A736 / A736M Plates
Pressure Vessel Industry
• Pressure vessels
• Reactor vessels
• Separator vessels
• Pressure chambers
Boiler Industry
• Steam boilers
• Boiler drums
• Water tube boilers
• Boiler pressure components
Petrochemical Industry
• Chemical reactors
• Process vessels
• Refinery equipment
• Storage tanks
Power Generation Industry
• Boiler systems
• Heat exchangers
• Thermal power plant equipment
• Pressure piping components
Oil and Gas Industry
• Process equipment
• Pressure tanks
• Industrial processing systems
• Storage vessels
Industrial Manufacturing
• Heavy engineering equipment
• Fabricated pressure equipment
• Industrial process plants
• Pressure-retaining components
Fabrication and
Welding
ASTM A736 / A736M pressure vessel plates provide excellent fabrication and welding characteristics.
• Suitable for conventional welding processes
• Good bending and forming properties
• Excellent machining performance
• Suitable for heavy fabrication work
• Reliable welded joint performance
• Excellent dimensional accuracy
Proper welding procedures and post-weld heat treatment should be followed where required by the application.
Heat Treatment
ASTM A736 / A736M plates may be supplied in different heat-treated conditions depending on service requirements.
• Normalizing improves toughness and grain refinement
• Quenching and tempering enhances strength and toughness (when specified)
• Stress relieving minimizes residual stresses after fabrication
• Controlled rolling ensures consistent mechanical properties
• Heat treatment improves long-term pressure vessel performance
Advantages of ASTM
A736 / A736M Plates
• Excellent pressure resistance
• High structural integrity
• Superior weldability
• Excellent impact toughness
• Reliable elevated temperature performance
• Outstanding fabrication characteristics
• Long operational service life
• Excellent mechanical stability
• Suitable for critical pressure applications
• Cost-effective engineering solution
Conclusion
ASTM A736 / A736M Pressure Vessel Plates are high-quality steel plates developed for welded pressure vessels, boilers, heat exchangers, reactors, storage tanks, and industrial process equipment requiring excellent strength, toughness, weldability, and reliable long-term performance. Available in Grade A and Grade C, these plates are widely used in petrochemical plants, refineries, power generation facilities, oil and gas installations, fertilizer plants, and heavy industrial engineering applications.
Ladhani Metal Corporation supplies ASTM A736 / A736M pressure vessel plates in Grade A and Grade C, various thicknesses, heat-treated conditions, surface finishes, and customized dimensions, delivering dependable material solutions for pressure vessel, boiler, and industrial engineering projects worldwide.
FOR REQUIREMENT OF THIS GRADE OR FOR DETAIL CONTACT US AT :-
info@ladhanimetals.com
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