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Introduction
ASTM
B649 covers alloy bars and wire manufactured from low-carbon
nickel-iron-chromium-molybdenum-copper alloys and chromium-nickel-iron-nitrogen
alloys designed for applications requiring excellent corrosion resistance, high
mechanical strength, and reliable performance in severe operating environments.
These alloys provide superior resistance to pitting, crevice corrosion, stress
corrosion cracking, oxidation, and chemical attack.
ASTM
B649 alloy bars and wire are widely used in chemical processing plants, oil and
gas industries, offshore applications, marine equipment, power generation
plants, desalination systems, pharmaceutical industries, heat exchangers,
pollution control equipment, and industrial processing applications. Their
excellent corrosion resistance, durability, and fabrication properties make
them suitable for critical components exposed to aggressive environments.
The
specification ensures controlled chemical composition, excellent mechanical
properties, dimensional accuracy, and dependable performance for demanding
industrial applications.
Ladhani
Metal Corporation is a manufacturer, supplier, and exporter of ASTM B649 Alloy
Bars & Wire, supplying high-quality alloy products for chemical processing,
marine, oil & gas, power generation, and industrial engineering
applications worldwide.
Applicable Standard
Standard
Specification: ASTM B649
Organization:
ASTM International
Title:
Standard Specification for Ni-Fe-Cr-Mo-Cu Low-Carbon Alloy (UNS N08904),
Ni-Fe-Cr-Mo-Cu-N Low-Carbon Alloys (UNS N08925, UNS N08031, and UNS N08926),
and Cr-Ni-Fe-N Low-Carbon Alloy (UNS R20033) Bar and Wire
This
specification covers alloy bars and wire intended for applications requiring
outstanding corrosion resistance, strength, and long-term service performance.
Forms of Supply
ASTM
B649 alloy products are supplied in the following forms:
•
Round Bars
• Square Bars
• Flat Bars
• Hex Bars
• Bright Bars
• Forged Bars
• Hot Rolled Bars
• Cold Drawn Bars
• Precision Bars
• Wire Rods
• Straight Wire
• Coil Wire
• Cut-to-Length Bars
• Custom Sizes
Grades Covered
Under ASTM B649
UNS
N08904, UNS N08925, UNS N08031, UNS N08926, UNS R20033
Supply Condition
•
Hot Rolled Condition
• Cold Drawn Condition
• Annealed Condition
• Solution Annealed Condition
• Bright Drawn Condition
• Fabrication-Ready Condition
Surface Finish
•
Mill Finish
• Bright Finish
• Polished Finish
• Peeled Finish
• Centerless Ground Finish
• Machined Finish
Standard Sizes
Bars
Diameter:
6 mm to 500 mm
Length:
Up to 6000 mm
Shapes:
Round, Square, Flat, Hexagonal
Wire
Diameter:
0.10 mm to 12 mm
Supply
Form: Coil, Spool, Straight Length
Custom
sizes, diameters, lengths, and finishes are available according to customer
requirements.
Chemical
Composition of ASTM B649
|
Element |
UNS N08904 |
UNS N08925 |
UNS N08031 |
UNS N08926 |
UNS R20033 |
|
Carbon, Max % |
0.02 |
0.02 |
0.015 |
0.02 |
0.015 |
|
Manganese, Max % |
2.0 |
1.0 |
2.0 |
2.0 |
2.0 |
|
Phosphorus, Max % |
0.045 |
0.045 |
0.02 |
0.03 |
0.02 |
|
Sulfur, Max % |
0.035 |
0.03 |
0.01 |
0.01 |
0.01 |
|
Silicon, Max % |
1.0 |
0.5 |
0.3 |
0.5 |
0.5 |
|
Nickel, % |
23.00–28.00 |
24.00–26.00 |
30.0–32.0 |
24.00–26.00 |
30.0–33.0 |
|
Chromium, % |
19.00–23.00 |
19.00–21.00 |
26.0–28.0 |
19.00–21.00 |
31.0–35.0 |
|
Molybdenum, % |
4.0–5.0 |
6.0–7.0 |
6.0–7.0 |
6.0–7.0 |
0.50–2.0 |
|
Copper, % |
1.0–2.0 |
0.8–1.5 |
1.0–1.4 |
0.5–1.5 |
0.30–1.20 |
|
Nitrogen, % |
— |
0.10–0.20 |
0.15–0.25 |
0.15–0.25 |
0.35–0.60 |
|
Iron |
Balance |
Balance |
Balance |
Balance |
Balance |
The chemical composition
requirements depend on the selected ASTM B649 grade.
Key Features of
ASTM B649 Alloy Bars & Wire
•
Excellent resistance to corrosion
• Superior resistance to pitting and crevice corrosion
• Excellent stress corrosion cracking resistance
• High mechanical strength
• Good oxidation resistance
• Excellent weldability
• Good machinability
• Excellent fabrication properties
• Long service life
• Suitable for aggressive chemical environments
Applications of
ASTM B649 Alloy Bars & Wire
Chemical Processing Industry
•
Chemical reactors
• Process equipment
• Pumps and valves
• Storage tanks
• Chemical handling systems
Oil & Gas Industry
•
Offshore platforms
• Process equipment
• Heat exchanger components
• Valve components
• Corrosion-resistant parts
Marine Industry
•
Seawater systems
• Marine equipment
• Offshore structures
• Desalination plants
Power Generation Industry
•
Heat exchangers
• Condensers
• Flue gas desulfurization systems
• Power plant components
Pharmaceutical Industry
•
Process vessels
• Storage equipment
• Production systems
• Clean processing equipment
Industrial Applications
•
Fasteners
• Machined components
• Shafts
• Industrial fittings
• Corrosion-resistant components
Fabrication and
Welding
ASTM
B649 alloy bars and wire provide excellent fabrication and welding
characteristics.
•
Suitable for conventional welding processes
• Good machining performance
• Excellent cold forming properties
• Reliable welded joint performance
• Good dimensional stability
• Suitable for complex fabrication
Proper
welding procedures should be followed to maintain corrosion resistance and
mechanical properties.
Heat Treatment
ASTM
B649 alloy bars and wire are generally supplied in annealed or solution
annealed conditions.
•
Solution annealing improves corrosion resistance
• Annealing improves ductility and formability
• Controlled heat treatment ensures uniform properties
• Stress relieving reduces fabrication stresses
• Proper heat treatment enhances service performance
Advantages of ASTM
B649 Alloy Bars & Wire
•
Outstanding corrosion resistance
• Excellent mechanical strength
• Superior resistance to aggressive chemicals
• High durability
• Excellent weldability
• Long operational life
• Low maintenance requirements
• Good dimensional stability
• Easy fabrication
• Reliable performance in harsh environments
Conclusion
ASTM
B649 Alloy Bars & Wire are high-performance alloy products designed for
applications requiring excellent corrosion resistance, strength, and
durability. Available in UNS N08904, UNS N08925,
UNS N08031, UNS N08926, and UNS R20033, these alloy bars and
wire products are widely used in chemical processing, oil & gas, marine,
power generation, pharmaceutical, desalination, and industrial engineering
applications.
Ladhani Metal Corporation supplies
ASTM B649 Alloy Bars & Wire in various grades, sizes, surface finishes, and
customized dimensions, providing reliable alloy solutions for critical
industrial and engineering applications worldwide.
FOR REQUIREMENT OF THIS GRADE
OR FOR DETAIL CONTACT US AT :-
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