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Introduction
ASTM A203 / A203M covers nickel alloy steel plates intended for use in pressure vessels and boilers, particularly in applications requiring improved toughness at low and moderate temperatures. These plates are designed to provide enhanced impact resistance and strength compared to standard carbon steel plates.
The presence of nickel improves toughness and makes ASTM A203 plates suitable for low-temperature service conditions, especially in industries where resistance to brittle fracture is critical.
Ladhani Metal Corporation is a manufacturer, supplier, and exporter of ASTM A203 / A203M alloy steel plates, offering high-quality plates for pressure vessel and cryogenic applications.
Applicable
Standard
- Standard
Specification: ASTM A203 / A203M
- Organization:
ASTM International
- Title: Pressure
Vessel Plates, Alloy Steel, Nickel
This specification covers nickel alloy steel plates intended for welded pressure vessels.
Forms of Supply
ASTM A203 alloy steel plates are available in the following forms:
- Plates
- Cut-to-size
plates
- Flame-cut plates
- Hot rolled plates
Supply
Condition
- As-rolled
condition
- Normalized
condition
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 A203 / A203M
- Grade A
- Grade B
- Grade D
- Grade E
- Grade F
These grades vary based on nickel content and mechanical properties.
Chemical
Composition of ASTM A203 Alloy Steel Plates (%)
|
Elements |
Grade A |
Grade B |
Grade D |
Grades E and F |
|
Carbon, max A |
||||
|
Up to 2 in. [50 mm] in thickness |
0.17 |
0.21 |
0.17 |
0.20 |
|
Over 2 in. to 4 in. [100 mm] incl. in thickness |
0.20 |
0.24 |
0.20 |
0.23 |
|
Over 4 in. [100 mm] in thickness |
0.23 |
0.25 |
— |
— |
|
Manganese, max: |
||||
|
Heat analysis: |
||||
|
2 in. [50 mm] and under |
0.70 |
0.70 |
0.70 |
0.70 |
|
Over 2 in. [50 mm] |
0.80 |
0.80 |
0.80 |
0.80 |
|
Product analysis: |
||||
|
2 in. [50 mm] and under |
0.78 |
0.78 |
0.78 |
0.78 |
|
Over 2 in. [50 mm] |
0.88 |
0.88 |
0.88 |
0.88 |
|
Phosphorus, max A |
0.035 |
0.035 |
0.035 |
0.035 |
|
Sulfur, max A |
0.035 |
0.035 |
0.035 |
0.035 |
|
Silicon: |
||||
|
Heat analysis |
0.15–0.40 |
0.15–0.40 |
0.15–0.40 |
0.15–0.40 |
|
Product analysis |
0.13–0.45 |
0.13–0.45 |
0.13–0.45 |
0.13–0.45 |
|
Nickel: |
||||
|
Heat analysis |
2.10–2.50 |
2.10–2.50 |
3.25–3.75 |
3.25–3.75 |
|
Product analysis |
2.03–2.57 |
2.03–2.57 |
3.18–3.82 |
3.18–3.82 |
Tensile
Requirements
|
Grades A and D |
Grades B and E |
Grade F |
||||
|
ksi |
MPa |
ksi |
MPa |
ksi |
MPa |
|
|
Tensile strength |
65–85 |
450–585 |
70–90 |
485–620 |
80–100 |
550–690 |
|
Yield strength, min |
||||||
|
2 in. [50 mm] and under |
37 |
255 |
40 |
275 |
55 |
380 |
|
Over 2 in. [50 mm] |
37 |
255 |
40 |
275 |
50 |
345 |
|
Elongation in 8 in. [200
mm], min, % A |
19 |
— |
17 |
— |
— |
— |
|
Elongation in 2 in. [50
mm], min, % A,B |
23 |
— |
21 |
— |
20 |
— |
Key
Features of ASTM A203 Alloy Steel Plates
- Excellent
toughness at low temperatures
- Improved
resistance to brittle fracture
- Good weldability
- Nickel-enhanced
mechanical properties
- Suitable for
pressure vessel applications
- Reliable
performance in cold environments
- Uniform strength
and durability
Applications
of ASTM A203 Alloy Steel Plates
ASTM A203 plates are widely used in industries requiring low-temperature toughness and pressure resistance.
Pressure
Vessels
- Storage tanks
- Pressure vessels
- Reactors
Cryogenic
Applications
- Low-temperature
storage tanks
- LNG storage
systems
- Cryogenic vessels
Oil
and Gas Industry
- Processing
equipment
- Storage systems
Petrochemical
Industry
- Refinery vessels
- Chemical
processing equipment
Industrial
Fabrication
- Heavy engineering
structures
- Structural
components
Heat
Treatment
- Plates are
typically supplied in normalized condition
- Normalizing
improves grain structure and toughness
- Heat treatment
enhances impact resistance and mechanical properties
Conclusion
ASTM A203 / A203M alloy steel plates provide excellent toughness, strength, and reliability for pressure vessel and low-temperature applications. With nickel alloy composition, these plates are especially suitable for cryogenic and cold service environments where resistance to brittle fracture is essential.
Ladhani Metal Corporation supplies ASTM A203 / A203M plates in multiple grades and sizes, ensuring high-quality materials for industrial, cryogenic, and engineering applications.
FOR REQUIREMENT OF THIS GRADE OR FOR DETAIL CONTACT US AT :-
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