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Introduction
ASTM A202 / A202M covers chromium-manganese-silicon alloy steel plates intended primarily for welded pressure vessels and boilers operating at moderate and lower temperatures. These plates are designed to provide good strength, durability, and resistance to pressure conditions in industrial environments.
ASTM A202 alloy steel plates are widely used where improved mechanical properties over carbon steel are required, along with reliable performance under pressure and temperature variations.
Ladhani Metal Corporation is a manufacturer, supplier, and exporter of ASTM A202 / A202M alloy steel plates, offering high-quality plates suitable for pressure vessel and structural applications.
Applicable
Standard
- Standard
Specification: ASTM A202 / A202M
- Organization:
ASTM International
- Title:
Pressure Vessel Plates, Alloy Steel, Chromium-Manganese-Silicon
This specification covers alloy steel plates intended for use in welded boilers and pressure vessels.
Forms
of Supply
ASTM A202 alloy steel plates are supplied in various forms:
- Plates
- Cut-to-size
plates
- Flame-cut
plates
- Hot
rolled plates
Supply Condition
- As-rolled
condition
- Normalized
condition (as required)
Surface Finish
- Hot
rolled finish
- Shot
blasted
- Pickled
(if required)
Standard Sizes
- Thickness:
6 mm to 150 mm
- Width:
Up to 3000 mm
- Length:
Up to 12000 mm or as per requirement
Grades
Covered Under ASTM A202 / A202M
- Grade
A
- Grade
B
These grades differ primarily in their mechanical strength and chemical composition.
Chemical
Requirements (% Composition)
|
Element |
Grade A |
Grade B |
|
Carbon, max |
0.17 |
0.25 |
|
Manganese |
1.05–1.40 (heat) / 0.97–1.52 (product) |
1.05–1.40 (heat) / 0.97–1.52 (product) |
|
Phosphorus, max |
0.035 |
0.035 |
|
Sulfur, max |
0.035 |
0.035 |
|
Silicon |
0.50–0.90 (heat) / 0.54–0.96 (product) |
0.60–0.90 (heat) / 0.54–0.96 (product) |
|
Chromium |
0.35–0.60 (heat) / 0.31–0.64 (product) |
0.35–0.60 (heat) / 0.31–0.64 (product) |
Tensile
Requirements
|
Property |
Grade A |
Grade B |
|
Tensile Strength (ksi) |
75–95 |
85–110 |
|
Tensile Strength (MPa) |
515–655 |
585–760 |
|
Yield Strength, min (ksi) |
45 |
47 |
|
Yield Strength, min (MPa) |
310 |
325 |
|
Elongation (200 mm), min % |
16 |
15 |
|
Elongation (50 mm), min % |
19 |
18 |
Key
Features of ASTM A202 Alloy Steel Plates
- Good
strength and toughness
- Suitable
for pressure vessel applications
- Enhanced
performance compared to carbon steel plates
- Good
weldability
- Resistance
to moderate temperature and pressure conditions
- Uniform
mechanical properties
- Reliable
structural integrity
Applications of ASTM A202 Alloy
Steel Plates
ASTM A202 plates are widely used in industries requiring pressure-resistant materials.
Pressure Vessels
- Storage
tanks
- Pressure
containers
- Reactors
Boiler Industry
- Boiler
shells
- Steam
drums
- Heat
exchangers
Petrochemical Industry
- Processing
equipment
- Refinery
vessels
Oil and Gas Industry
- Pressure
piping systems
- Storage
units
Industrial Fabrication
- Structural
components
- Heavy
engineering equipment
Heat
Treatment
- Plates
may be supplied in as-rolled or normalized condition
- Normalizing
improves toughness and grain structure
- Heat
treatment enhances mechanical properties and performance under stress
Conclusion
ASTM A202 / A202M alloy steel plates offer an excellent combination of strength, weldability, and pressure resistance, making them ideal for boilers and pressure vessel applications. With chromium-manganese-silicon composition, these plates provide enhanced performance compared to standard carbon steels.
Ladhani Metal Corporation supplies ASTM A202 / A202M alloy steel plates in various grades, sizes, and specifications to meet industrial and engineering requirements.
FOR REQUIREMENT OF THIS GRADE
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