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Introduction
ASTM
B691 covers iron-nickel-chromium-molybdenum alloy rod, bar, and wire
manufactured for applications requiring excellent corrosion resistance, high
strength, and reliable performance in aggressive industrial environments. These
alloys provide outstanding resistance to pitting, crevice corrosion, stress
corrosion cracking, oxidation, and chemical attack, making them suitable for
demanding service conditions.
ASTM
B691 alloy rod, bar, and wire are widely used in chemical processing plants,
marine industries, offshore applications, power generation plants, pollution
control systems, pharmaceutical equipment, heat exchangers, desalination
plants, and industrial engineering applications. Their excellent corrosion
resistance, durability, and mechanical properties make them ideal for critical
components operating in harsh environments.
The
specification ensures controlled chemical composition, superior mechanical
properties, dimensional accuracy, and excellent fabrication characteristics for
industrial and engineering applications.
Ladhani
Metal Corporation is a manufacturer, supplier, and exporter of ASTM B691 Alloy
Rod, Bar & Wire, supplying high-quality alloy products for chemical
processing, marine, power generation, oil & gas, and industrial
applications worldwide.
Applicable Standard
Standard
Specification: ASTM B691
Organization:
ASTM International
Title:
Standard Specification for Iron-Nickel-Chromium-Molybdenum Alloys (UNS N08366
and UNS N08367) Rod, Bar, and Wire
This
specification covers iron-nickel-chromium-molybdenum alloy rod, bar, and wire
intended for applications requiring excellent corrosion resistance, strength,
and long-term service performance.
Forms of Supply
ASTM
B691 alloy products are supplied in the following forms:
•
Round Rods
• Round Bars
• Square Bars
• Flat Bars
• Hex Bars
• Bright Bars
• Forged Bars
• Hot Rolled Bars
• Cold Drawn Bars
• Wire Rods
• Straight Wire
• Coil Wire
• Precision Wire
• Custom Sizes
Grades Covered
Under ASTM B691
UNS
N08366
UNS
N08367
Supply Condition
•
Hot Rolled Condition
• Cold Drawn Condition
• Annealed Condition
• Solution Annealed Condition
• Bright Finished Condition
• Fabrication-Ready Condition
Surface Finish
•
Mill Finish
• Bright Finish
• Polished Finish
• Peeled Finish
• Centerless Ground Finish
• Machined Finish
Standard Sizes
Rod & Bar
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
diameters, lengths, and finishes are available according to customer
requirements.
Chemical
Composition of ASTM B691
|
Chemical Composition |
Symbol |
Value |
|
Carbon |
C % |
0.030 max. |
|
Silicon |
Si % |
1.000 max. |
|
Manganese |
Mn % |
2.000 max. |
|
Chromium |
Cr % |
20.000 - 22.000 |
|
Sulphur |
S % |
0.030 max. |
|
Molybdenum |
Mo % |
6.000 - 7.000 |
|
Phosphorus |
P % |
0.040 max. |
|
Copper |
Cu % |
0.750 max. |
|
Nitrogen |
N % |
0.180 - 0.250 |
|
Nickel |
Ni % |
23.500 - 25.500 |
|
Iron |
Fe % |
Balance |
Mechanical Properties
|
Property |
Value |
|
Tensile Strength |
655 MPa min. |
|
Yield Strength |
310 MPa min. |
|
Elongation |
30% min. |
|
Reduction of Area |
- |
|
Hardness (BHN) |
- |
|
Impact (Joule) |
- |
Key Features of
ASTM B691 Alloy Rod, Bar & Wire
•
Excellent corrosion resistance
• Superior resistance to pitting and crevice corrosion
• High mechanical strength
• Excellent oxidation resistance
• Outstanding resistance to chloride environments
• Good weldability
• Excellent machinability
• Superior fabrication characteristics
• Long service life
• Suitable for severe industrial environments
Applications of
ASTM B691 Alloy Rod, Bar & Wire
Chemical Processing Industry
•
Chemical reactors
• Process equipment
• Pumps and valves
• Storage systems
• Chemical handling components
Oil & Gas Industry
•
Offshore equipment
• Process components
• Valve parts
• Heat exchanger components
• Corrosion-resistant fittings
Marine Industry
•
Seawater systems
• Marine equipment
• Offshore structures
• Desalination plants
Power Generation Industry
•
Heat exchanger components
• Condenser parts
• Pollution control equipment
• Power plant components
Pharmaceutical Industry
•
Process equipment
• Storage systems
• Production components
• Clean processing systems
Industrial Applications
•
Fasteners
• Machined components
• Shafts
• Industrial fittings
• Corrosion-resistant parts
Fabrication and
Welding
ASTM
B691 alloy rod, bar, and wire offer excellent fabrication and welding
characteristics.
•
Suitable for conventional welding processes
• Good machining properties
• Excellent forming characteristics
• Reliable welded joint performance
• Good dimensional stability
• Suitable for complex fabrication requirements
Proper
welding procedures should be followed to maintain corrosion resistance and
mechanical properties.
Heat Treatment
ASTM
B691 alloy products are generally supplied in annealed or solution-annealed
conditions.
•
Solution annealing improves corrosion resistance
• Annealing enhances ductility and fabrication properties
• Controlled heat treatment ensures uniform mechanical properties
• Stress relieving minimizes fabrication stresses
• Proper heat treatment improves long-term service performance
Advantages of ASTM
B691 Alloy Rod, Bar & Wire
•
Outstanding corrosion resistance
• Excellent mechanical strength
• Superior chemical resistance
• High durability
• Excellent weldability
• Long operational life
• Low maintenance requirements
• Good dimensional stability
• Easy fabrication
• Reliable performance in harsh environments
Conclusion
ASTM
B691 Alloy Rod, Bar & Wire are high-performance
iron-nickel-chromium-molybdenum alloy products designed for applications
requiring excellent corrosion resistance, strength, and durability. Available
in UNS N08366 and UNS N08367, these
alloy products are widely used in chemical processing, marine, power
generation, pharmaceutical, desalination, and industrial engineering
applications.
Ladhani Metal Corporation supplies
ASTM B691 Alloy Rod, Bar & 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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