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Introduction
ASTM A573 / A573M covers hot
rolled structural quality carbon steel plates intended for applications
requiring improved toughness compared to conventional carbon steel plates of
similar strength levels. These plates are produced with controlled chemical
composition and mechanical properties to provide excellent strength,
weldability, formability, and structural reliability.
ASTM A573 carbon steel plates
are widely used in structural fabrication, storage tanks, bridges, industrial
buildings, pressure-retaining structures, construction equipment, material
handling systems, and general engineering applications. The specification is
particularly suitable for applications where notch toughness is an important
consideration.
Ladhani Metal Corporation is
a manufacturer, supplier, and exporter of ASTM A573 / A573M structural carbon
steel plates, supplying premium-quality steel plates for structural,
construction, and engineering applications worldwide.
Applicable Standard
Standard Specification: ASTM
A573 / A573M
Organization: ASTM
International
Title: Standard Specification
for Structural Carbon Steel Plates of Improved Toughness
This specification covers
structural quality carbon steel plates with enhanced notch toughness for
structural and engineering applications.
Forms of Supply
ASTM A573 carbon steel
products are supplied in the following forms:
- Carbon steel plates
- Structural steel plates
- Hot rolled plates
- Heavy thickness plates
- Floor plates
- Cut-to-size plates
- Flame cut plates
- Plasma cut plates
- CNC profile cut plates
- Rolled plates
- Fabrication-ready plates
- Structural components
- Customized steel blanks
Grades Covered Under ASTM A573
- Grade 58
- Grade 65
- Grade 70
Supply Condition
- Hot rolled
- As rolled
- Normalized upon request
- Stress relieved upon request
- Fabrication-ready condition
Surface Finish
- Hot rolled finish
- Mill finish
- Shot blasted finish
- Pickled finish
- Primer coated finish
- Shop coated finish
Standard Sizes
Thickness: 5 mm to 150 mm
Width: 1000 mm to 3500 mm
Length: Up to 18000 mm
Custom dimensions are
available according to project requirements.
Chemical Composition of ASTM A573 Carbon Steel Plates (%)
|
Composition, % |
Grade 58 [400] |
Grade 65 [450] |
Grade 70 [485] |
|
Carbon, max |
|||
|
½ in. [13 mm] and
under |
0.23 |
0.24 |
0.27 |
|
Over ½ in. [13
mm] to 1½ in. [40 mm], incl |
0.23 |
0.26 |
0.28 |
|
Manganeseᴀ |
0.60–0.90 |
0.85–1.20 |
0.85–1.20 |
|
Phosphorus, max |
0.030 |
0.030 |
0.030 |
|
Sulfur, max |
0.030 |
0.030 |
0.030 |
|
Silicon |
0.10–0.35 |
0.15–0.40 |
0.15–0.40 |
|
Aluminum (total), minᴮ |
0.020 |
0.020 |
0.020 |
Notes:
|
Note |
Requirement |
|
A |
For
each reduction of 0.01 percentage point below the specified maximum carbon
content, an increase of 0.06 percentage point manganese above the specified
maximum is permitted, up to a maximum of 1.50% for Grade 58 and 65, and 1.60%
for Grade 70. |
|
B |
Minimum
aluminum content does not apply to plates with widths up to and including 15
in. [380 mm]. |
Tensile
Requirements
|
Property |
Grade 58 [400] |
Grade 65 [450] |
Grade 70 [485] |
|
Tensile Strength,
ksi [MPa] |
58–71 [400–490] |
65–77 [450–530] |
70–90 [485–620] |
|
Yield Point, min,
ksi [MPa] |
32 [220] |
35 [240] |
42 [290] |
|
Elongation in 8
in. [200 mm], min, %ᴮ,ᶜ |
21 |
20 |
18 |
|
Elongation in 2
in. [50 mm], min, %ᴮ,ᶜ |
24 |
23 |
21 |
Notes:
|
Note |
Requirement |
|
A |
See
the Orientation subsection in the Tension Tests section of ASTM A6/A6M. |
|
B |
Elongation
need not be determined for floor plate. |
|
C |
For
plates wider than 24 in. [600 mm], the elongation requirement is reduced by
two percentage points. See the Elongation Requirement Adjustments subsection
in the Tension Tests section of ASTM A6/A6M. |
Key Features of ASTM A573 Carbon Steel Plates
- Improved notch toughness
- Excellent weldability
- Good formability
- Reliable structural performance
- Uniform mechanical properties
- Good machinability
- Suitable for fabrication and
welding
- Excellent strength-to-cost ratio
- Good impact resistance
- Long service life
Applications of ASTM A573 Carbon Steel Plates
Structural Engineering
- Structural frameworks
- Fabricated steel structures
- Industrial platforms
- Load-bearing assemblies
Construction Industry
- Commercial buildings
- Industrial buildings
- Infrastructure projects
- Structural supports
Storage Tank Industry
- Storage tanks
- Water tanks
- Process tanks
- Bulk storage systems
Material Handling Industry
- Hoppers
- Chutes
- Conveying systems
- Handling equipment
Heavy Equipment Manufacturing
- Machinery structures
- Equipment frames
- Industrial components
- Engineering assemblies
General Engineering Applications
- Fabricated components
- Structural supports
- Steel constructions
- Industrial fabrication
Fabrication and Welding
ASTM A573 carbon steel plates
provide excellent fabrication characteristics.
- Suitable for conventional welding
methods
- Excellent cutting performance
- Good bending and forming properties
- Suitable for flame cutting
- Easy machining and fabrication
- Excellent assembly characteristics
The balanced chemical
composition helps achieve good weldability while maintaining structural
strength.
Heat Treatment
ASTM A573 plates are
generally supplied in the hot rolled condition.
- Normalizing may be performed to
improve toughness
- Stress relieving may be applied
after fabrication
- Heat treatment enhances structural
performance
- Controlled processing ensures
uniform mechanical properties
Advantages of ASTM A573 Carbon Steel Plates
- Improved toughness compared to
conventional structural carbon steels
- Excellent fabrication
characteristics
- Good weldability
- Reliable structural integrity
- Cost-effective material solution
- Consistent mechanical properties
- Good durability
- Suitable for a wide range of
applications
- Easy availability
- Long operational life
Conclusion
ASTM A573 / A573M Grade 58,
Grade 65, and Grade 70 structural carbon steel plates are high-quality hot
rolled steel plates designed for structural applications requiring improved
toughness, good weldability, and reliable mechanical performance. Their
combination of strength, toughness, fabrication ease, and cost-effectiveness
makes them suitable for structural engineering, construction, storage tanks,
material handling systems, and industrial fabrication projects.
Ladhani Metal Corporation supplies
ASTM A573 / A573M structural carbon steel plates in various grades,
thicknesses, and customized dimensions, providing dependable material solutions
for structural and engineering applications worldwide.
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