What payment terms do you accept?

We accept T/T, L/C, D/P, and Western Union.

Can the surface finish be customized?

Yes, we offer rough machine, black surface, turned, peeled, and annealed finishes.

What is the size tolerance?

Length tolerance is +100mm/-0mm, and straightness is within 6mm/m.

Strong Forged Round Bar 4140 4130 for Structural Integrity

Name: Strong Forged Round Bar 4140 4130 for Structural Integrity
Brand: Shandong Dajin Metal Material Co., Ltd.
SKU: 2175303442

Shandong, ChinaShandong Dajin Metal Material Co., Ltd.

US$600.00-900.00

10 Tons

Product profile

Customization

Available

Type

Round

Standard

AISI, ASTM, DIN, JIS, GB

Model NO.

forged steel bar

Composition

Alloy Steel or Carbon Steel

Technique

Forged

Shape

Bar

Surface Treatment

Rough Machine/Black Surface/Lath Machine

Special Use

Cold Heading Steel, Mold Steel

Application

Heavy Duty Machine

Ready Stock

Yes

Main Grades

C45 SAE1045 45# 4140 Scm440 42CrMo4 4130 4150 4340

Heat Treatment

Qt/Normalized/Annealing

Size Tolerance of Rough Machine

-0/+0.5mm

Cutting

Yes

Factory Visiting

Welcome

Ut Level

Sep1928 D/D or C/C

Transport Package

Seaworthy Pacakging

Specification

200mm-1000mm

Trademark

Shandong

Origin

China

Production Capacity

5000tons

Key features

Premium Alloy Steel Grades: Available in 4140, 4130, 42CrMo4, C45, and SCM440 for superior strength.

Extensive Size Range: Round bars from 10mm to 1000mm diameter; flat bars up to 2200mm width.

Rigorous Quality Inspection: 100% ultrasonic testing according to SEP1921-84 GR.3 CLASS C/C standards.

Custom Heat Treatment: Options include QT, Normalized, and Annealing to meet specific requirements.

Fast Delivery for Stock: 7-day delivery for ready stock items; 30 days for new material orders.

Traceability Assurance: Each bar is marked with a heat number and includes a mill test certificate.

Versatile Surface Finish: Available in rough machine, black surface, turned, or peeled finishes.

Seaworthy Packaging: Standard seaworthy packing or customized packaging as per customer request.

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: ≤10.33hTerms 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.