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Introduction
ASTM A508 /
A508M covers quenched and tempered vacuum-treated carbon and alloy steel
forgings intended for pressure vessels, reactor vessels, and high-pressure
industrial applications. These forgings are designed to provide excellent
toughness, strength, and reliability under demanding operating conditions.
ASTM A508
alloy steel forgings are widely used in nuclear power plants, pressure vessels,
and critical heavy engineering applications where high mechanical integrity is
essential.
Ladhani
Metal Corporation is a manufacturer, supplier, and exporter of ASTM A508 /
A508M alloy steel forgings, supplying high-quality forged components for
pressure and high-temperature applications.
Applicable Standard
Standard
Specification: ASTM A508 / A508M
Organization: ASTM International
Title: Standard Specification for Quenched and Tempered Vacuum-Treated Carbon
and Alloy Steel Forgings for Pressure Vessels
This
specification covers alloy steel forgings for pressure vessels and
high-pressure service applications.
Forms of Supply
ASTM A508
alloy steel forgings are supplied in the following forms:
Forged rings
Forged discs
Forged shafts
Forged blocks
Forged nozzles
Pressure vessel forgings
Custom forged components
Supply
Condition
Quenched and
tempered
Heat-treated condition
Vacuum-treated condition
Surface
Finish
Black
surface
Rough machined
Shot blasted
Machined finish
Standard
Sizes
Diameter: Up
to 5000 mm
Thickness: Up to 1500 mm
Weight: As per requirement
(Custom
sizes available as per drawings)
Grades Covered Under ASTM A508 / A508M
Class 1
Class 2
Class 3
Class 4
These
classes are alloy steel forgings developed for pressure vessel and
nuclear-grade applications.
Chemical Composition of ASTM A508 Alloy Steel Forgings
(%)
|
Element |
Grade 1 |
Grade 1A |
Grade 2 |
Grade 3 |
Grade 4N |
Grade 5 |
Grade 22 |
Grade 3V |
Grade 3VCb |
|
Carbon |
0.35 max |
0.30 max |
0.27 max |
0.25 max |
0.23 max |
0.23 max |
0.11–0.15 |
0.10–0.15 |
0.10–0.15 |
|
Manganese |
0.40–1.05 |
0.70–1.35 |
0.50–1.00 |
1.20–1.50 |
0.20–0.40 |
0.20–0.40 |
0.30–0.60 |
0.30–0.60 |
0.30–0.60 |
|
Phosphorus |
0.025 max |
0.025 max |
0.025 max |
0.025 max |
0.020 max |
0.020 max |
0.015 max |
0.020 max |
0.020 max |
|
Sulfur |
0.025 max |
0.025 max |
0.025 max |
0.025 max |
0.020 max |
0.020 max |
0.015 max |
0.020 max |
0.010 max |
|
Siliconᵃ |
0.15–0.40 |
0.15–0.40 |
0.15–0.40 |
0.15–0.40 |
0.15–0.40 |
0.30 max |
0.50 max |
0.10 max |
0.10 max |
|
Nickel |
0.40 max |
0.40 max |
0.50–1.00 |
0.40–1.00 |
2.8–3.9 |
2.8–3.9 |
0.25 max |
— |
0.25 max |
|
Chromium |
0.25 max |
0.25 max |
0.25–0.45 |
0.25 max |
1.50–2.00 |
1.50–2.00 |
2.0–2.50 |
2.8–3.3 |
2.7–3.3 |
|
Molybdenum |
0.10 max |
0.10 max |
0.55–0.70 |
0.45–0.60 |
0.40–0.60 |
0.40–0.60 |
0.90–1.10
max |
0.9–1.10 |
0.90–1.10 |
|
Vanadium |
0.05 max |
0.05 max |
0.05 max |
0.05 max |
0.03 max |
0.08 max |
0.02 max |
0.20–0.30 |
0.20–0.30 |
|
Columbium |
— |
— |
— |
— |
— |
— |
— |
— |
0.015–0.070 |
|
Copper |
— |
— |
— |
— |
— |
— |
— |
— |
0.25 max |
|
Calcium |
— |
— |
— |
— |
— |
— |
— |
— |
0.0005–0.0150 |
|
Boron |
— |
— |
— |
— |
— |
— |
— |
0.001–0.003 |
— |
|
Titanium |
— |
— |
— |
— |
— |
— |
— |
0.015–0.035 |
0.015 max |
|
Aluminum |
— |
— |
— |
— |
— |
— |
— |
— |
— |
Notes:
- ᵃ When vacuum
carbon-deoxidation is required by Supplementary Requirement S11, the
silicon content shall be 0.10% maximum.
- ᵇ International addition of Cb
and Ti not permitted.
Tensile
Requirement
|
Grade |
Tensile Strength, ksi [MPa] |
Yield Strength, min, ksi [MPa] |
Elongation in 2 in. or 50 mm, min,
% |
Reduction of Area, min, % |
|
Grade 1
and 1A |
70–85
[485–585] |
38 [265] |
20 |
38 |
|
Grade 2 |
75–90
[515–620] |
33 [345] |
18 |
33 |
|
Grade 2
Class 3 |
75–90
[515–620] |
35 [450] |
16 |
35 |
|
Grade 5
and 5A |
75–90
[515–620] |
45 [585] |
18 |
45 |
|
Grade 5
Class 2 |
75–90
[515–620] |
45 [590] |
16 |
45 |
|
Grade 4N |
70–85
[485–585] |
48 [705] |
20 |
48 |
|
Grade 22
Class 3 |
95–110
[655–760] |
45 [585] |
18 |
45 |
|
Grade 3V /
3VCb Class 10 |
85–100
[585–690] |
45 [610] |
18 |
45 |
Key Features of ASTM A508 Alloy Steel Forgings
Excellent
toughness and strength
High resistance to pressure and stress
Suitable for critical pressure vessel applications
Reliable performance at elevated temperatures
Vacuum-treated for improved cleanliness
Excellent structural integrity and durability
Long service life in demanding environments
Applications of ASTM A508 Alloy Steel Forgings
ASTM A508
forgings are widely used in industries requiring high-strength pressure vessel
components.
Nuclear
Power Industry
• Reactor vessel components
• Nuclear pressure vessels
Power Plants
• Steam turbine components
• High-pressure systems
Heavy
Engineering
• Forged pressure components
• Large industrial machinery parts
Oil & Gas
Industry
• Pressure vessel equipment
• High-stress forged parts
Heat Treatment
Forgings are
quenched and tempered
Vacuum treatment improves material cleanliness and toughness
Heat treatment ensures optimum mechanical properties and structural integrity
Conclusion
ASTM A508 / A508M alloy steel forgings provide a dependable solution for pressure vessels, nuclear power systems, and heavy engineering applications. With excellent toughness, strength, and reliability, these forgings are ideal for critical components operating under extreme pressure and temperature conditions.
Ladhani Metal Corporation supplies ASTM A508 / A508M alloy steel forgings in various classes and sizes, ensuring high-quality products for nuclear, power generation, and industrial engineering applications.
FOR REQUIREMENT OF THIS GRADE OR FOR DETAIL CONTACT US AT :-
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