What surface treatments are available?

Available surface conditions include Black, Peeled, Polished, Machined, Grinded, Turned, and Milled.

AISI 4140 Alloy Flat Steel Bar

Name: AISI 4140 Alloy Flat Steel Bar
Brand: HUNAN QILU INDUSTRIAL CO., LTD.
SKU: 675216212

Hunan, ChinaHUNAN QILU INDUSTRIAL CO., LTD.

US$1,500.00-1,800.00

20 Tons

Sample price:US$0.00/piece.Request sample

Product profile

Customization

Available

Technique

Hot Rolled

Standard

AISI, JIS, ASTM, DIN, BS, GB

Model NO.

AISI 4140

Certification

IS0, RoHS, ABS

Alloy Flat Steel Bar

1.7225

Type

Steel Plate

Surface Treatment

Black Surface

Application

Ship Plate

Special Use

High-Strength Steel Plate

Transport Package

Loose in 20" or 40" Container

Specification

DIN-En10083-2

Trademark

Qilu

Origin

Shangdong, China

HS Code

7214100000

Production Capacity

40, 000metric Tons/Year

Key features

High Strength & Toughness: Features 1% Cr-Mo alloy elements with excellent balance of strength, toughness, and impact resistance.

Wide Size Range: Available in Round Dia 6-1200mm and Plate Thickness 6mm-500mm with widths up to 1000mm.

Multiple Heat Treatments: Offers Normalized, Annealed, Quenched, and Tempered conditions to meet specific mechanical needs.

Comprehensive Testing: Includes tensile, yield, elongation, impact value, hardness, grain size, and ultrasonic testing.

Global Standard Compliance: Meets AISI, JIS, ASTM, DIN, BS, and GB standards with ISO, RoHS, ABS, and UL certifications.

Versatile Surface Options: Provides Black, Peeled, Polished, Machined, Grinded, Turned, and Milled surface finishes.

Fast Delivery Capability: Lead time is 30-45 days with over 20,000 tons of stock available in Wuxi and Dongguan.

Heavy Duty Manufacturing: Capable of forging pieces up to 50T with 4500t forging units and advanced smelting facilities.

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: ≤2.42hTerms 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.