What are the main applications for AISI 4340 steel?

It is widely used for aircraft landing gear, automotive components, oil and gas drilling, machine building, and heavy-duty shafts, gears, and axles.

What surface treatments are available?

Standard surface treatment is Black Surface. Other options include Peeled, Polished, Machined, Grinded, and Turned.

What certifications or standards does the steel meet?

The steel meets standards including AISI, ASTM, GB, JIS, DIN, and BS.

Sheet

Name: En24/817m40 1.6511 4340 Hot Rolled Carbon Steel Plate/Sheet
Brand: HUNAN QILU INDUSTRIAL CO., LTD.
SKU: 1970995675

Hunan, ChinaHUNAN QILU INDUSTRIAL CO., LTD.

US$1,000.00-1,500.00

1 Ton

Sample price:US$0.00/piece.Request sample

Product profile

Customization

Available

After-sales Service

Yes

Warranty

Three Years

Model NO.

4340

Type

Alloy Steel Bar

Standard

AISI, ASTM, GB, JIS, DIN, BS

Technique

Hot Rolled

Application

Tool Steel Bar

Surface Treatment

Black Surface

Special Use

Engineering Steel

Heat Treatment

Annealed, Qt

Payment Term

30% Tt Deposit, Balance Against Bl Copy

Length

3000-5800mm

Ex-Stock

Delivery Date

30 Days

Ut Standard

Sep 1921-84 D/D

Grain Size

ASTM E112

Non-Metallic Inclusiton

ASTM E45

Transport Package

Seaworthy Package

Specification

100-1200MM

Trademark

Qilu

Origin

China

HS Code

722840

Production Capacity

500, 000tons/Year

Key features

High Strength & Toughness: Medium carbon low alloy steel with tensile strength 930-1080 Mpa and excellent shock resistance.

Versatile Machinability: Good ductility in annealed condition allows bending, forming, and machining by all customary methods.

Wide Size Range: Plates available in thickness 6mm-500mm and width 20mm-1000mm for diverse engineering needs.

Multiple Heat Treatments: Supplied in Normalized, Annealed, Quenched, or Tempered states to meet specific mechanical requirements.

Critical Industry Application: Ideal for aircraft landing gear, automotive parts, oil drilling, and heavy-duty shafts and gears.

Comprehensive Testing: Includes tensile, yield, impact, hardness, grain size, ultrasonic, and magnetic particle testing.

Established Manufacturer: Over 11 years export experience with advanced smelting and forging facilities since 1965.

Global Stock Availability: Over 20,000 tons ex-stock available in Wuxi and Dongguan warehouses for quick delivery.

Company profile

Importers and ExportersHigh Repeat Buyers ChoiceFast DeliveryLow MOQ

HUNAN QILU INDUSTRIAL CO., LTD.

Hunan, China

Business Type: Manufacturer/FactoryExport Year: 2008-06-01Nearest Port: SHANGHAI, NINGBO, QINGDAOAverage Response Time: ≤4.33hTerms of Payment: LC, T/T, Western Union, etc.International Commercial Terms(Incoterms): FOB, EXW, CFR, CIF

AI-Powered supplier vetting

SummaryThe supplier is identified as HUNAN QILU INDUSTRIAL CO., LTD., a China-based limited company with conflicting classifications as both a trading company and manufacturer/factory. It has broad steel-related business activities, extensive stated export markets, self-operated import/export rights, and eight years of export experience. Customization, ODM, and OEM capabilities are explicitly reported. However, service-management documentation is absent, including supplier approval, corrective-action, and complaint-handling procedures. No in-stock, overseas warehouse, showroom, agent, or branch capability is reported. Financial records are referenced for 2021–2023, but no substantive financial performance evidence is provided. Production volumes and staffing are stated, although the supplier’s trading-company classification creates uncertainty regarding direct manufacturing capacity. No certifications or customer cases are documented.

After-Sales capabilityThe supplier reports no written procedures or records for service-capability assessment, corrective and preventive actions, or customer-complaint handling. It also reports no in-stock service, overseas warehouse, showroom, agent, or branch capability, although lead times are stated as one month in both peak and off-season periods.

R&D capabilityThe supplier reports total R&D-engineer experience of 6–10 years and offers ODM services, indicating some design and development capability. However, it has no available SDK, and the slices do not provide concrete innovation outputs, patents, or product-development records.

Production capacityThe supplier states production categories covering cold-drawn material, steel round bar, steel plate, and steel pipe, with substantial annual output figures and 11–20 quality-control staff. However, its classification as both trading company and manufacturer/factory is inconsistent, so the extent of directly controlled production capacity requires verification.

Customization capabilityFlexible customization is explicitly reported, together with ODM service availability and OEM service for popular brands. These statements provide direct evidence of customization and outsourced-brand production capability.