What surface finishes are available?

Available finishes include peeled, cold drawn, turned, turned & polished, and centerless ground.

What certifications does the factory hold?

We hold ISO9001, ISO/TS16949, ISO4001, OHSAS18001, CE Mark, JIS MARK, and KS MARK certifications.

Bolts Material 5140 4140 B7 Qt Steel Bar for Thread Rod

Name: Bolts Material 5140 4140 B7 Qt Steel Bar for Thread Rod
Brand: Shandong Dajin Metal Material Co., Ltd.
SKU: 767650512

Shandong, ChinaShandong Dajin Metal Material Co., Ltd.

US$1,000.00

5-9 Tons

US$980.00

10+ Tons

Sample price:US$1.00/piece.Request sample

Product profile

Customization

Available

Type

Alloy Steel Bar

Standard

AISI, ASTM, DIN, JIS, GB

Model NO.

steel bar

Composition

Ferrous Steel Scrap

Technique

Cold Drawn

Shape

Bar

Surface Treatment

Polished

Special Use

Cold Heading Steel

Application

Structural Steel Bar

Bolts Raw Material

High Tensile Bolts

Main Grade

5140 SCR440 B7 B16 4140 42CrMo

Surface

Black or Bright Surface

Supply Condition

Cold Drawn Steel Bar

Threading Rod

Qt Steel Bar

Transport Package

Seaworthy Packaging

Specification

5-200mm

Trademark

dajin

Origin

China

Production Capacity

5000

Key features

High Mechanical Properties: Superior tensile strength, yield strength, and low temperature impact toughness for demanding applications.

Wide Size Availability: Round bars 5mm-130mm, Square 6x6mm-100x100mm, Flat 3mm-50mm, Hex 6mm-100mm available.

Customizable Tolerances: Standard h9, h10, h11 tolerances or custom requirements according to client specifications.

Multiple Surface Finishes: Options include peeled, cold drawn, turned, polished, and centerless ground finishes.

Fast Delivery for Stock: 7-10 days delivery time for stock items; 30 days for new material orders.

Comprehensive Testing: Includes spectral, microstructure, hardness, macrostructure, and UT tests for quality assurance.

Free Sample Service: Free samples are available upon request for product evaluation.

Advanced Production Tech: Utilizes heat treatment furnaces, centerless grinders, and polishing machines for precision.

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: ≤6.37hTerms 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.