What are the main applications of AISI 4140 steel?

It is widely used in aerospace, oil & gas, automotive, agricultural, and defense industries for parts like gears, shafts, axles, and spindles.

Does the supplier have stock availability?

Yes, we maintain over 20,000 tons of stock in Wuxi and Dongguan warehouses with various sizes available.

What testing standards are applied to the steel?

Tests include Tensile Strength, Yield Strength, Elongation, Impact Value, Hardness, Grain Size (ASTM E112), and Ultrasonic Test (ASTM E45).

Alloy Steel Round Bar (42CrMo, SCM440, 4140, 42CrMo4)

Name: Alloy Steel Round Bar (42CrMo, SCM440, 4140, 42CrMo4)
Brand: HUNAN QILU INDUSTRIAL CO., LTD.
SKU: 663715512

Hunan, ChinaHUNAN QILU INDUSTRIAL CO., LTD.

US$1,000.00-1,200.00

20 Tons

Sample price:US$0.00/piece.Request sample

Product profile

Customization

Available

Type

Alloy Steel Bar

Standard

AISI

Model NO.

alloy steel round bar 4140 / 42CrMo4

Technique

Forged

Application

Tool Steel Bar

Alloy

Special Use

Free Cutting Steel

Payment Term

30% Tt Deposit, Balance Against Bl Copy

Length

3000-5800mm

Ut Standard

Sep 1921-84 D/D

Grain Size

ASTM E112

Non-Metallic Inclusiton

ASTM E45

Heat Treatment

Normalized;Annealed ;Quenched ;Tempered

Surface

Black; Peeled; Polished; Machined; Grinded; Turned

Test

Ensile Strength, Yield Strength, Elongation

Transport Package

Loose In 20" Or 40" Container

Specification

DIN-En10083-2

Trademark

Qilu

Origin

Shangdong, China

HS Code

72284000

Production Capacity

40000metric Tons/Year

Key features

Wide Size Range: Round bars available in diameters from 6mm to 1200mm, accommodating diverse industrial needs.

Versatile Surface Finish: Options include black, peeled, polished, machined, grinded, turned, and milled surfaces.

Multiple Heat Treatments: Available in normalized, annealed, quenched, and tempered conditions for optimal performance.

Global Stock Availability: Over 20,000 tons of stock maintained in Wuxi and Dongguan warehouses for rapid delivery.

Comprehensive Testing: Includes tensile strength, yield strength, elongation, impact value, hardness, and ultrasonic tests.

Heavy Duty Capacity: Capable of forging pieces up to 50T with equipment including 4500t forging units.

Wide Application Scope: Suitable for aerospace, oil & gas, automotive, agriculture, and defense industries.

Flexible Payment Terms: Accepts T/T, L/C, Money Gram, and PayPal to facilitate international transactions.

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: ≤4.22hTerms 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.