What are the main applications of AISI 4145 steel?

It is used for high tensile shafts, bolts, gears, pinions, spindles, oil drill pipe joints, fishing tools, and bending machine molds.

Does the company have stock available?

Yes, we have warehouses in Wuxi and Dongguan with over 20000 tons of ex-stock available in various sizes.

What standards does the steel comply with?

The steel complies with AISI, JIS, ASTM, DIN, BS, and GB standards.

AISI ASTM 4145 Engineering Steel

Name: AISI ASTM 4145 Engineering Steel
Brand: HUNAN QILU INDUSTRIAL CO., LTD.
SKU: 880316465

Hunan, ChinaHUNAN QILU INDUSTRIAL CO., LTD.

US$700.00-1,500.00

1 Ton

Product profile

Customization

Available

Technique

Forged

Standard

AISI, JIS, ASTM, DIN, BS, GB

Model NO.

AISI ASTM 4145 Engineering Steel

Certification

IS0

AISI 4140

Flat Steel Bar

Transport Package

Loose in 20" or 40" Container

Specification

DIN-En10083-2

Trademark

Qilu

Origin

Shangdong, China

HS Code

7228400000

Production Capacity

40, 000metric Tons/Year

Key features

High Quality Alloy Steel: AISI 4145 is a quenched and tempered alloy structural steel with hardness 28-34 HRc.

Customizable Cutting: Round bars can be sawn to required lengths; rectangular pieces cut to specific sizes.

Wide Size Range: Round Dia 6-1200mm, Plate Thickness 6-500mm, Width 20-1000mm available.

Multiple Heat Treatments: Available in Normalized, Annealed, Quenched, and Tempered conditions.

Comprehensive Testing: Includes tensile, yield, elongation, hardness, ultrasonic, and magnetic particle testing.

Large Capacity Forging: Max piece weight up to 50T with 4500t forging units available.

Fast Delivery Options: Off-season lead time within 15 workdays; 20000 tons ex-stock available.

Global Export Experience: 11 years of export experience serving markets in Europe, Americas, Asia, and Africa.

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: ≤4.52hTerms 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.

Product Q&A

Q:What is the hardness of AISI 4145 steel?

Oil Quenched & Tempered hardness is 28-34 HRc, while annealing delivery hardness is less than 250HB.

Q:Can the steel bars be cut to specific sizes?

Yes, round bars can be sawn to required lengths and rectangular pieces can be cut from flat bar or plate to specific sizes.

Q:What are the available delivery conditions?

Options include Forged, Hot rolled, Cold drawn, Annealed, Normalized, Quenched, Tempered, Black, Peeled, Polished, Machined, Grinded, Turned, and Milled.

Q:What payment terms are accepted?

We accept T/T, L/C, Money gram, and Paypal.

Q:What is the typical delivery time?

Standard delivery time is 30-45 days. Off-season lead time is within 15 workdays.