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Introduction
ASTM A36 /
A36M covers carbon structural steel used in welded, bolted, and riveted
construction applications. This material is one of the most widely used carbon
steels due to its excellent weldability, machinability, strength, and
cost-effectiveness.
ASTM A36
carbon structural steel is extensively used in construction, fabrication,
infrastructure, and industrial engineering applications where reliable
structural performance is required.
Ladhani
Metal Corporation is a manufacturer, supplier, and exporter of ASTM A36 / A36M
carbon structural steel products, supplying high-quality structural steel
materials for diverse industrial and construction requirements.
Applicable Standard
Standard
Specification: ASTM A36 / A36M
Organization: ASTM International
Title: Standard Specification for Carbon Structural Steel
This
specification covers carbon steel shapes, plates, and bars intended for
structural applications.
Forms of Supply
ASTM A36
carbon structural steel is supplied in the following forms:
Steel plates
Steel sheets
Round bars
Square bars
Flat bars
Hex bars
Angles
Channels
Beams
I-beams
H-beams
T-sections
Structural sections
Steel strips
Chequered plates
Forged components
Cut-to-size materials
Supply Condition
Hot rolled
Normalized condition (if required)
As-fabricated condition
Surface Finish
Mill finish
Shot blasted
Primer coated
Galvanized finish (if required)
Standard Sizes
Thickness: 3
mm to 300 mm
Width: Up to 3500 mm
Length: Up to 12000 mm or as required
(Custom
sizes available as per requirement)
Grades Covered Under ASTM A36 / A36M
ASTM A36
This grade
is a low-carbon structural steel offering good strength, weldability, and
machinability.
Chemical Composition of ASTM A36 Carbon Structural
Steel (%)
|
Element |
Shapes
– All Thicknesses |
Plates
Over 3/4 to 1 1/2 in. [20 to 40 mm] incl |
Plates
Over 1 1/2 to 2 1/2 in. [40 to 65 mm] incl |
Plates
Over 2 1/2 to 4 in. [65 to 100 mm] incl |
Plates
Over 4 in. [100 mm] |
Bars
Over 3/4 to 1 1/2 in. [20 to 40 mm] incl |
Bars
Over 1 1/2 to 4 in. [40 to 100 mm] incl |
Bars
Over 4 in. [100 mm] |
|
Carbon, max % |
0.26 |
0.25 |
0.26 |
0.27 |
0.29 |
0.26 |
0.27 |
0.29 |
|
Manganese % |
— |
0.80–1.20 |
0.85–1.20 |
0.85–1.20 |
0.85–1.20 |
0.60–0.90 |
0.60–0.90 |
0.60–0.90 |
|
Phosphorus, max % |
0.04 |
0.04 |
0.04 |
0.04 |
0.04 |
0.04 |
0.04 |
0.04 |
|
Sulfur, max % |
0.05 |
0.05 |
0.05 |
0.05 |
0.05 |
0.05 |
0.05 |
0.05 |
|
Silicon % |
0.40 max |
0.40 max |
0.15–0.40 |
0.15–0.40 |
0.15–0.40 |
0.40 max |
0.40 max |
0.40 max |
|
Copper, min % (when copper steel
specified) |
0.20 |
0.20 |
0.20 |
0.20 |
0.20 |
0.20 |
0.20 |
0.20 |
Notes
- “—” indicates no specified
requirement.
- Heat analysis for manganese
shall be determined and reported as described in ASTM A6 / A6M.
- Manganese content of
0.85–1.35 % and silicon content of 0.15–0.40 % are required for plates
over 3/4 in. [20 mm] thickness.
- For each
reduction of 0.01 % below the specified carbon maximum, an increase of
0.06 % manganese above the specified maximum is permitted up to a maximum
of 1.35 %.
ASTM A36 / A36M – Tensile Requirements
|
Product
Type |
Tensile
Strength, min ksi [MPa] |
Yield
Point, min ksi [MPa] |
Elongation
in 8 in. [200 mm], min % |
Elongation
in 2 in. [50 mm], min % |
|
Plates, Shapes, and Bars |
58–80 [400–550] |
36 [250] |
20 |
23 |
|
Plates and Bars over 8 in. [200 mm] wide |
58–80 [400–550] |
36 [250] |
20 |
23 |
|
Shapes |
58–80 [400–550] |
36 [250] |
— |
21 |
Additional Details
•
Tensile requirements are specified according to ASTM A36 / A36M standard.
•
Yield strength represents the minimum stress required to produce permanent
deformation in the material.
•
Tensile strength indicates the maximum stress the material can withstand before
fracture.
•
Elongation values define the ductility of the material and its ability to
stretch before breaking.
Notes
- Refer
to ASTM A6 / A6M for specimen orientation and testing procedures.
- For
wide flange shapes over 426 lb/ft [634 kg/m], the maximum tensile strength
limit does not apply and minimum elongation in 2 in. [50 mm] is reduced to
19.5 %.
- Yield
point of 32 ksi [220 MPa] is permitted for plates over 8 in. [200 mm] in
thickness.
- Elongation
is not required for floor plates.
- For plates wider than 24 in. [600
mm], elongation requirements are reduced by two percentage points.
Key Features of ASTM A36 Carbon Structural Steel
Excellent
weldability and machinability
Good strength and toughness
Cost-effective structural material
Easy fabrication and forming
Widely available in multiple forms
Suitable for general structural applications
Reliable mechanical performance
Applications of ASTM A36 Carbon Structural Steel
ASTM A36 steel is widely used in industries requiring dependable structural
materials.
Construction
Industry
• Building structures
• Bridges and platforms
Industrial
Fabrication
• Structural frames
• Base plates
Engineering
Applications
• Machinery components
• Equipment supports
Infrastructure
Projects
• Transmission towers
• Industrial sheds
Heat Treatment
ASTM A36
steel is generally supplied in hot rolled condition
Normalizing may be applied to improve toughness and grain structure
Heat treatment enhances mechanical uniformity
Conclusion
ASTM A36 /
A36M carbon structural steel provides a versatile and economical solution for
structural and industrial applications. With excellent weldability, good
strength, and availability in multiple forms, ASTM A36 steel remains one of the
most preferred materials for fabrication and construction projects.
Ladhani
Metal Corporation supplies ASTM A36 / A36M carbon structural steel in plates,
bars, beams, channels, and structural sections, ensuring high-quality products
for construction, engineering, and industrial applications.
FOR REQUIREMENT OF THIS GRADE OR FOR DETAIL CONTACT US AT :-
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