What quality inspection standards are followed?

We conduct comprehensive testing to assure quality and consistency. This includes 100% Ultrasonic Inspection adhering to SEP1921-84, GR.3 CLASS C/C standards.

What are the main applications for these steel bars?

These bars are ideal for statically and dynamically stressed components in vehicles, engines, and machinery, including crankshafts and gears.

What is the manufacturing process used?

We utilize an advanced process including EAF+LF+VD (mandatory) +UT, with optional Peeling, Turning, and Heat Treatment to achieve optimal results.

4140 Forged Round Bar for Heavy Duty Machine Components

Name: 4140 Forged Round Bar for Heavy Duty Machine Components
Brand: Shandong Dajin Metal Material Co., Ltd.
SKU: 2182576162

Shandong, ChinaShandong Dajin Metal Material Co., Ltd.

US$700.00-900.00

10 Tons

Product profile

Customization

Available

Type

Round

Standard

AISI, ASTM, DIN, JIS, GB

Model NO.

steel bar

Composition

Alloy Steel Bar

Technique

Forged

Shape

Bar

Surface Treatment

Black Surface or Rough Machine

Special Use

Free Cutting Steel, Mold Steel

Application

Structural Steel Bar

Supply Condition

Hot Forged or Qt

Forged Shaft

Rough Machine

Main Material

Carbon or Allloy

Main Grade

4140 4340 4150 4145 8620

Cutting Service

Yes

Forging Rings

Yes

Transport Package

Seaworth Packaging

Specification

200mm-1000mm

Trademark

Shandong

Origin

China

Production Capacity

2000tons

Key features

Customizable Dimensions: Available in Round shape with Dia. 16-1000mm to meet precise specifications.

High-Strength Material: Forged Alloy Steel Bars (4140/4340) engineered for durability and resilience.

Flexible Supply Conditions: Options include Hot Rolled, Forged, Peeling, Black Surface, Annealed, or QT.

Comprehensive Quality Inspection: 100% Ultrasonic Inspection adhering to SEP1921-84, GR.3 CLASS C/C standards.

Precise Heat Treatment: Controlled Soft Annealing, Hardening, Normalizing, and Tempering processes.

Custom Packaging Solutions: Standard seaworthy packing or tailor-made solutions as per customer requirements.

Versatile Applications: Ideal for statically and dynamically stressed components in vehicles and machinery.

Advanced Manufacturing Process: Utilizes EAF+LF+VD mandatory process with optional Peeling, Turning, and Heat Treatment.

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: ≤8.06hTerms 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.

Product Q&A

Q:What are the available sizes for the forged round bars?

We offer versatile dimensions with a diameter range of 16mm to 1000mm. Specifically, 16mm-350mm is available with a hot rolled supply condition, while 200-1000mm is available with a forged supply condition for enhanced strength.

Q:What steel grades are available?

Our main grades include 4140, 4340, 4150, 4145, and 8620. Specific compositions are available for grades like 42CrMo4 and 1.7225, ensuring optimal performance in tough conditions.

Q:What is the delivery time for orders?

The standard lead time is 30 days post order confirmation. During the off-season, delivery can be completed within 15 workdays, while peak season lead time is approximately one month.

Q:What payment terms do you accept?

We accept various international payment terms including LC, T/T, D/P, and Western Union to accommodate different customer preferences.

Q:Is customization available for packaging?

Yes, we provide secure and customizable packaging options. Standard seaworthy packing is available, or we can offer tailor-made solutions as per your specific requirements.