What are the standard sizes for forged steel bars?

Forged steel round bars range from 200mm to 800mm. Square blocks are 200mm*200mm to 500mm*500mm, and flat blocks are (150mm to 500mm)*(200mm to 500mm).

Is customization available for shapes and sizes?

Yes, we provide custom forging parts and rings according to customer drawings, with customizable surface treatments and supply conditions.

What quality inspections are performed?

Each bar undergoes spectral testing, microstructure testing, hardness testing, macrostructure testing, and UT testing to ensure high standards.

Premium 4145 Hot Forging Steel Round Bar for Heavy Industries

Name: Premium 4145 Hot Forging Steel Round Bar for Heavy Industries
Brand: Shandong Dajin Metal Material Co., Ltd.
SKU: 2186451932

Shandong, ChinaShandong Dajin Metal Material Co., Ltd.

US$600.00-900.00

10 Tons

Product profile

Customization

Available

Type

Round

Standard

AISI, ASTM, JIS, GB

Model NO.

steel bar

Composition

Alloy Steel Bar

Technique

Forged

Shape

Bar

Surface Treatment

Rough Machine or/Black Surface/Shining

Special Use

Mold Steel

Application

Auto Parts

Supply Condition

Qt/Normalized/Only Forged

Surface

Rough Machining/Black Surface

Main Grade

Scm440 4140 4145 4130 8620 S45c

Forging Rings

Forging Parts

Transport Package

Seaworth Packaging

Specification

200mm-1000mm

Trademark

DAJIN

Origin

China

Production Capacity

2000tons

Key features

Premium Hot Forged Quality: Hot forged alloy steel bars with superior strength, durability, and structural integrity for heavy industries.

Wide Grade Selection: Available in multiple grades including 4140, 4145, SCM440, 8620, and S45c to meet diverse application needs.

Customizable Dimensions: Custom sizes available for round bars (200-800mm), square blocks, and flat blocks according to customer drawings.

Strict Quality Control: Rigorous inspections including spectral, microstructure, hardness, and UT tests with full traceability via heat numbers.

International Certifications: Certified to ISO9001, ISO/TS16949, ISO14001, CE Mark, JIS MARK, and KS MARK for global compliance.

Flexible Delivery Options: Fast delivery within 7 days for stock items and 30 days for new material orders.

Free Sample Available: Customers can experience product quality firsthand with free samples before placing large orders.

Versatile Applications: Ideal for auto parts, crankshafts, gears, and statically/dynamically stressed components in vehicles and engines.

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.

Product Q&A

Q:What are the available steel grades?

We offer a wide range of grades including 4140, 4130, 4150, SCM440, SCM435, SCM420, SCM415, ASTM A36, A105, S20C, S45c, and 8620.

Q:What is the delivery time for orders?

Delivery time is 7 days for stock items and 30 days for new material orders. Peak season lead time is one month, while off-season is within 15 workdays.

Q:What payment terms do you accept?

We accept flexible payment terms including T/T (Telegraphic Transfer) and L/C (Letter of Credit) to suit your business needs.

Q:Can I get a free sample?

Yes, we provide free samples so you can experience our quality firsthand before committing to a purchase.

Q:What certifications does the product have?

Our products are certified to ISO9001, ISO/TS16949, ISO14001, OHSAS18001, CE Mark, JIS MARK, and KS MARK standards.