How is the quality inspected?

We perform 100% Ultrasonic testing according to SEP1921-84 and GR.3 CLASS C/C standards to ensure reliability.

What are the main applications for these bars?

They are ideal for statically and dynamically stressed components in vehicles, engines, machines, crankshafts, and gears.

Can the packaging be customized?

Yes, we provide standard seaworthy packing or customized packaging solutions to suit your specific needs.

Precision Forged Steel Alloy Bar 4140 4145 4150 Round Bar

Name: Precision Forged Steel Alloy Bar 4140 4145 4150 Round Bar
Brand: Shandong Dajin Metal Material Co., Ltd.
SKU: 2182686622

Shandong, ChinaShandong Dajin Metal Material Co., Ltd.

US$800.00-1,000.00

2 Tons

Sample price:US$1.00/piece.Request sample

Product profile

Customization

Available

Type

Round

Standard

AISI, ASTM, DIN, JIS

Model NO.

alloy steel bar

Composition

Ferrous Steel Scrap

Technique

Forged

Shape

Bar

Surface Treatment

Rough Machining

Special Use

Roller Shaft

Application

Structural Steel Bar

Material

Alloy Steel Bar

Main Grade

SAE4140 4145 4150 Scm435 Scm440 42CrMo4 1.7225

Supply Condition

Forged Steel Bar

Surface

Black or Bright Surface

Other Type

Forged Parts, Forging Ring

Transport Package

Anti-Rust Packaging

Specification

200-800mm

Trademark

dajin

Origin

China

Production Capacity

2000

Key features

High-Strength Alloy Steel: 4140/4145/4150 grades offer exceptional toughness and durability for critical applications.

Customizable Dimensions: Round bars available in Dia. 16mm-1000mm with tailored supply conditions.

Versatile Surface Options: Choose from Black, Bright, Peeled, or Rough Machining surfaces as required.

Rigorous Quality Inspection: 100% Ultrasonic testing per SEP1921-84 and GR.3 CLASS C/C standards.

Advanced Manufacturing: Utilizes EAF+LF+VD process with optional Heat Treatment and precision machining.

Wide Grade Availability: Supply includes 4140, 4145, 4150, SCM435, SCM440, 42CrMo4, and 1.7225.

Custom Packaging: Standard seaworthy packing or customized solutions to protect your investment.

Expert Technical Support: CAD design, EDM machining, and quality planning for precision prototyping.

Company profile

Shandong Dajin Metal Material Co., Ltd.

Shandong, China

Business Type: Manufacturer/FactoryExport Year: 2017-03-04Nearest Port: Qingdao port, Tianjin port, Shanghai portAverage Response Time: ≤6.91hTerms of Payment: LC, T/T, D/P, etc.International Commercial Terms(Incoterms): FOB, CFR, CIF, FAS, DDP, CPT, FCA, EXW

AI-Powered supplier vetting

SummaryShandong Dajin Metal Material Co., Ltd. is identified as a Chinese manufacturer/factory based in Shandong, with four production lines, stated production capacities for several steel-bar categories, and export activity across multiple regions. It holds ISO 9001 and OHSAS/OHSMS 18001 certifications and states that it can supply multiple international standards and customized steel products. The supplier reports export activity since 2017 and that exports represent 51%–70% of total sales. Evidence supports production scale, certification, customization, and international trading capability. However, the provided information does not sufficiently establish after-sales service processes, innovation capability, or financial credibility. Trade records show named buyers and shipments involving Brazil and Pakistan, but the limited transaction evidence does not establish broad or sustained customer performance.

Supplier typeThe supplier is explicitly classified as a Manufacturer/Factory and operates as Shandong Dajin Metal Material Co., Ltd., a limited company located in Shandong, China. This directly supports its status as a manufacturing supplier rather than only a trading entity.

CertificationsThe supplier reports holding ISO 9001 and OHSAS/OHSMS 18001 management-system certifications. These stated certifications provide explicit evidence of quality-management and occupational health and safety systems, although certificate validity dates and scope are not provided.

Production capacityThe supplier reports four production lines, 11–20 years of total R&D-engineer experience, 11–20 quality-control staff, and substantial stated capacities for steel bar, carbon steel round bar, and cold-drawn steel bar. It also reports ready stock of 1,000–1,500 tons for specified products and exports to multiple global regions, providing explicit evidence of meaningful production and fulfillment capability.

Customization capabilityThe supplier explicitly states that it can provide products to GB, American, German, Japanese, industry, and special steel standards and can offer customized services according to customer requirements. Its listed grades and 5 mm–300 mm size range for certain stocked products further support product configuration flexibility.

Client casesTrade records associate the supplier with named buyers in Brazil and Pakistan and show shipments involving steel-related products through Qingdao, including a recorded transaction count of one for one buyer and two for another. These records provide evidence of actual international customer transactions, but the limited number of documented cases does not establish a broad, long-term, or independently verified customer portfolio.