4340 Stainless Steel Round Bars

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MOQ : 50 Kilograms

4340 Stainless Steel Round Bars Specification

Tolerance
H9-H13 or as specified

Specific Use
Heavy-duty shafts, gears, and high-stress mechanical parts

Grade
4340 / 4340QT

Length
Custom, cut to length as per requirement

Type
Round Bars

Material
4340 Stainless Steel

Diameter
16 (406.4 mm as shown in the image)

Application
Machinery, aircraft components, shafting, and high-strength parts

Processing
Heat Treated, Quenched & Tempered

Finish
Rough/Annealed (as pictured, mill finish)

Technique
Hot Rolled / Forged

Standard
ASTM, AISI, SAE, EN, JIS (commonly used standards for 4340 steel)

Surface Condition
As rolled / Annealed

Heat Number
21-9-3-4 (as shown)

Corrosion Resistance
Moderate; better with surface treatments

Reduction of Area
45-50% (typical for 4340 steel)

Elongation
16-20% (typical for 4340 steel)

Weight
6155 kg (for 16

Ultimate Tensile Strength
Approximately 1080 MPa (can vary based on heat treatment)

Yield Strength
Approximately 745 MPa (can vary based on heat treatment)

Shape
Round

Hardness
Typically supplied in Annealed or Heat Treated condition, customizable

Magnetic Properties
Magnetic

4340 Stainless Steel Round Bars About

Experience the sizzling performance of 4340 Starting Stainless Steel Round Bars, featuring a towering combination of strength and versatility. With a sterling yield strength of approximately 745 MPa and an ultimate tensile strength of around 1080 MPa, these first-class bars are designed for heavy-duty shafts, gears, and high-stress parts in machinery and aircraft components. Supplied in an ephemeral, as-rolled or annealed finish, each bar can be customized for length and hardness, ensuring it precisely fits your application. Try now for robust solutions that meet ASTM, AISI, SAE, EN, and JIS standards. Exported globally from India, with heat numbers, mill finish, and strict tolerances.

Site of Application & Industrial Utility

4340 Starting Stainless Steel Round Bars are primarily installed in high-performance machinery, aircraft components, and robust shafting. Their exceptional strength makes them ideal for dynamic and static loads in high-stress environments. These round bars are extensively used in the production of gears, connecting rods, and heavy-duty mechanical parts for construction, transportation, and manufacturing sectors. Their adaptability ensures superior results across critical engineering projects where reliability and mechanical integrity are paramount.

Domestic Market, Packaging & Certifications

Our main domestic mar for 4340 stainless steel round bars spans leading industrial hubs throughout India. Each shipment is meticulously packed in sturdy, export-grade bundles or wooden casings to ensure safe packing & dispatch. We adhere to stringent certification norms, supplying mill test certificates and compliance documents to guarantee product authenticity and specification. Every order is handled with care, ensuring fast delivery and traceable shipment from our certified manufacturing facilities.

FAQ's of 4340 Starting Stainless Steel Round Bars:

Q: How can 4340 Starting Stainless Steel Round Bars be customized for specific applications?

A: 4340 Starting Stainless Steel Round Bars can be supplied in custom lengths, specified tolerances, and chosen heat treatment conditions such as annealed, quenched, or tempered, ensuring optimal performance for various industrial uses.

Q: What industries commonly use 4340 stainless steel round bars?

A: These round bars are extensively used in machinery manufacturing, aircraft component fabrication, heavy-duty shafting, and high-stress mechanical parts production, due to their excellent mechanical properties and adaptability.

Q: Where does the shipment and packing of 4340 round bars take place?

A: Shipments are organised and packed at our manufacturing and export facilities in India, using sturdy packaging options like wooden casings or steel-strapped bundles to ensure secure delivery internationally and domestically.

Q: What is the process for ordering customized 4340 steel round bars?

A: Customers provide their required specifications, such as diameter, length, finish, and tolerance. After confirmation, the bars are processed, inspected, certified, and dispatched according to customer requirements.

Q: What are the benefits of using 4340 alloy steel round bars over other steels?

A: 4340 steel offers a superior combination of strength, toughness, and resistance to fatigue, making it ideal for components where high performance, durability, and reliability are critical.

Q: When is it advisable to select a heat-treated or annealed 4340 round bar?

A: Select annealed bars for applications requiring better machinability or easy forming, and opt for heat-treated versions when maximum strength and resistance to wear or fatigue are necessary.

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