AISI 4130 Gr F91 Alloy Steel Bars

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AISI 4130 Gr F91 Alloy Steel Bars Specification

Heat Resistance
Excellent

Material Composition %
Chromium: 8-9.5%, Molybdenum: 0.85-1.05%, Carbon: 0.08-0.12%, Manganese: 0.3-0.6%, Silicon: 0.2-0.5%, Iron: Balance

Size
Custom Sizes

Product Form
Bar

Hardness
200-241 HBW

Tensile Strength
585 MPa min

Coating Type
Uncoated / Customized as required

Diameter
10 mm to 400 mm

Recyclable
Yes

Corrosion Resistant
Yes

Product Name
AISI 4130 Gr F91 Alloy Steel Bars

Steel Type
Alloy Steel

Steel Product Type
Bars

Grade
AISI 4130 Gr F91

Thickness
10 mm to 400 mm

Shape
Round, Square, Hexagonal

Steel Standard
ASTM, AISI, DIN, JIS

Surface
Polished, Bright, Black, Peeled, Turned

Composition
Chromium, Molybdenum, Iron, Carbon, Manganese, Silicon, others

Application
Construction, Engineering, Power generation, Oil & Gas, Petrochemical industries

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

Weight
Dependent on size and length

Color
Metallic Bright

Material Grade
F91

Finish Type
Polished / Bright / Black

Usage
Industrial, Engineering, Mechanical applications

About AISI 4130 Gr F91 Alloy Steel Bars

What Are Specification AISI 4130 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 AISI 4130 Gr F91 Alloy Steel Bars?

STANDARD	UNS	WERKSTOFF NR.
AISI 4130	G41300	1.7218

Chemical Composition Of AISI 4130 Gr F91 Alloy Steel Bars?

Grade		C	Cr	Si	S	Mn	P	Mo
AISI 4130	min.	0.28	0.8	0.15	-	0.4	-	0.15
AISI 4130	max.	0.33	1.1	0.35	0.04	0.8	0.035	0.25

Mechanical Properties Of AISI 4130 Gr F91 Alloy Steel Bars?

Grade	Tensile Strength (ksi) min	Elongation (% in 50mm) min	Yield Strength 0.2% Proof (ksi) min	Hardness
AISI 4130	930	12	735	229

Superior Mechanical Properties

AISI 4130 Gr F91 Alloy Steel Bars deliver exceptional mechanical strength. With a yield strength of at least 415 MPa and a minimum elongation of 20%, these bars are engineered to withstand high-stress environments. Their remarkable impact strength and hardness range (200241 HBW) make them reliable for industrial and mechanical applications where durability and safety are critical.

Outstanding Fabrication and Performance

Engineered for ease of use, these alloy steel bars offer excellent machinability and weldability when following recommended procedures. Each bar is normalized and tempered for enhanced structural integrity and uniformity, ensuring optimal performance in high-temperature and corrosive conditions often encountered in construction, engineering, and power generation sectors.

Customization and Rigorous Testing

Available in a wide range of diameters (10 mm to 400 mm) and customizable lengths and shapes, the bars are tailored to fit project-specific requirements. Every bar undergoes 100% ultrasonic and mechanical testing to guarantee quality. Packaged securely as bundled or wrapped as per customer request, the bars are supplied in a finish suitable for your needspolished, bright, or black.

FAQs of AISI 4130 Gr F91 Alloy Steel Bars:

Q: How are AISI 4130 Gr F91 Alloy Steel Bars commonly used in industry?

A: These bars are widely utilized in construction, engineering, power generation, oil & gas, and petrochemical sectors. Their robust mechanical properties and excellent resistance to heat and corrosion make them ideal for pressure vessels, piping systems, structural frameworks, and mechanical components requiring dependable strength and durability.

Q: What is the recommended process for welding AISI 4130 Gr F91 Alloy Steel Bars?

A: For optimal weldability, it is advised to use established, recommended welding procedures specific to alloy steels. Preheating and post-weld heat treatment may be necessary to ensure the welded joints maintain the bars superior mechanical integrity and prevent issues like cracking or reduced toughness.

Q: When is ultrasonic and mechanical testing performed on these bars?

A: Ultrasonic and mechanical testing is conducted after manufacturing and heat treatment, before the bars are dispatched. This 100% testing approach helps ensure internal soundness, confirms compliance with industry standards (ASTM, AISI, DIN, JIS), and guarantees reliable performance in critical applications.

Q: Where can these alloy steel bars be sourced from?

A: AISI 4130 Gr F91 Alloy Steel Bars are available from reputable exporters, manufacturers, suppliers, and traders across India. With options for domestic and international shipping, they can be acquired in custom sizes, shapes, and packaging to meet your project requirements.

Q: What are the benefits of using F91 alloy steel bars over other materials?

A: F91 alloy steel bars offer a blend of high tensile strength, toughness, good elongation, and excellent resistance to corrosion and heat. Their machinability and weldability reduce fabrication costs, while their customizable sizes and durable composition support complex engineering tasks in harsh environments.

Q: How is the bar length and shape determined for a specific project?

A: Bar length and shape (round, square, hexagonal) can be customized according to project specifications. Customers can specify single random, double random, or exact lengths, as well as finish type (polished/bright/black), ensuring the bars fit perfectly within the intended design and performance needs.

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