ASTM A182 Gr F91 Alloy Steel Bars

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ASTM A182 Gr F91 Alloy Steel Bars Specification

Size
Customized

Material Composition %
Cr: 8-9%, Mo: 0.85-1.05%, V: 0.18-0.25%, C: 0.07-0.13%, Mn: 0.30-0.60%, Si: 0.20-0.50%

Product Form
Solid Bars

Heat Resistance
Excellent for high temperature applications

Diameter
10 mm to 250 mm

Hardness
Maximum 250 HB

Tensile Strength
585 MPa min

Corrosion Resistant
Moderate corrosion resistance

Recyclable
Yes

Coating Type
Uncoated / as requested

Product Name
ASTM A182 Gr F91 Alloy Steel Bars

Steel Type
Alloy Steel

Steel Product Type
Bars

Grade
F91

Thickness
Range: 5 mm to 250 mm

Shape
Round, Square, Hexagonal

Steel Standard
ASTM A182

Surface
Bright, Black, Polished

Composition
Cr-Mo-V Alloy (Chromium, Molybdenum, Vanadium)

Application
Power generation, petrochemical, oil & gas, boilers, heat exchangers

Dimension (L*W*H)
Custom as per requirement

Weight
As specified / per order

Color
Metallic Gray

Material Grade
F91

Finish Type
Polished / As rolled

Usage
Industrial engineering, high temperature service

About ASTM A182 Gr F91 Alloy Steel Bars

What Are Specification ASTM A182 Gr F91 Alloy Steel Bars?

Specification :	EN, DIN, JIS, ASTM, BS, ASME, AISI
Standard Specification :	ASTM A182 / ASME SA182
Size :	5mm to 500mm Dia in 100mm to 6000mm Length
Thickness :	0.5mm to 500mm Diameter
Diameter :	10 mm To 200 mm
Length :	1000 mm Long To 6000 mm Long
Form :	Round, Square, Hex (A/F), Rectangle, Billet, Ingot, Forging Etc
Finish :	Black, Bright Polished, Rough Turned, NO.4 Finish, Matt Finish, BA Finish

Equivalent material Of ASTM A182 Gr F91 Alloy Steel Bars?

STANDARD	WERKSTOFF NR.	UNS
ASTM A182 F91	1.4903	-

Chemical Composition Of ASTM A182 Gr F91 Alloy Steel Bars?

Grade	C	Mn	Si	Mo	P	Cr
ASTM A182 F91	0.08 - 0.15	0.30 - 0.60	0.20 - 0.50	0.85 - 1.05	0.020	8.0 - 9.5

Mechanical Properties Of ASTM A182 Gr F91 Alloy Steel Bars?

Tensile Strength (ksi) min	Elongation (% in 50mm) min	Yield Strength 0.2% Proof (ksi) min
570	23	295

Superior Heat and Strength Performance

ASTM A182 Gr F91 Alloy Steel Bars are engineered to withstand intense heat and high-pressure environments, making them ideal for use in power plant piping, pressure vessels, and high-temperature service applications. The advanced Cr-Mo-V alloy composition ensures reliability up to 600C, delivering consistent mechanical properties, including high impact value and minimum 15% elongation, for demanding operations.

Versatile Applications Across Industries

These alloy steel bars address the needs of a wide range of industries, such as power generation, petrochemical, oil and gas, and industrial engineering. Their availability in multiple shapes, sizes, and finishes means they can be tailored for critical systems including boilers and heat exchangers, ensuring durability and optimal performance under challenging conditions.

FAQs of ASTM A182 Gr F91 Alloy Steel Bars:

Q: How are ASTM A182 Gr F91 Alloy Steel Bars typically delivered?

A: These bars are supplied in a normalized and tempered condition, ensuring optimal mechanical properties for industrial use. Standard export packing is used to protect the product during transit, and bars can be provided in standard lengths of 5 to 6 meters or as cut-to-length, depending on customer requirements.

Q: What are the key benefits of using ASTM A182 Gr F91 Alloy Steel Bars?

A: The main advantages include excellent strength at high temperatures, good machinability, reliable weldability (with preheating recommended), moderate corrosion resistance, and high impact value (40 J min at room temperature). Their robust composition and versatile finishes make them suitable for critical and high-stress engineering applications.

Q: When is it recommended to use these alloy steel bars in engineering projects?

A: ASTM A182 Gr F91 bars are particularly suited for applications involving continuous operation at elevated temperatures, such as power plant piping, boilers, heat exchangers, and pressure vessels in the power generation, petrochemical, and oil & gas sectors.

Q: Where can these bars be sourced and in what forms are they available?

A: These bars are manufactured, exported, and supplied from India, with ready stock available for fast delivery. Customers can order round, square, or hexagonal solid bars in various diameters and thicknesses, finished bright, black, or polished, as required.

Q: What is the standard process for heat treatment of these bars?

A: ASTM A182 Gr F91 Alloy Steel Bars are heat treated by quenching and tempering, followed by normalization. This process ensures they achieve the target tensile strength, hardness (max 250 HB), and durability required for demanding industrial applications.

Q: How should these alloy steel bars be machined and welded?

A: The bars offer good machinability, allowing for precise shaping and finishing. For welding, preheating is advised to ensure proper fusion and to minimize thermal stress, maintaining the mechanical properties and structural integrity of the material.

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