Is the steel bar suitable for thread rolling?

Yes, it is optimized for automatic lathe turning and high-speed thread rolling with uniform hardness.

What is the warranty period for this product?

We provide a 1-year warranty and after-sales service for this product.

High-Strength B7 4140 Steel Round Bar for Thread Rods

Name: High-Strength B7 4140 Steel Round Bar for Thread Rods
Brand: Shandong Dajin Metal Material Co., Ltd.
SKU: 2182621122

Shandong, ChinaShandong Dajin Metal Material Co., Ltd.

US$1,050.00

3 Tons

Sample price:US$0.00/piece.Request sample

Product profile

Customization

Available

After-sales Service

1 Year

Warranty

1 Year

Model NO.

round bar

Type

Alloy Steel Bar

Standard

AISI, ASTM, GB, JIS

Technique

Cold Drawn

Application

B7 Threading Rod

Surface Treatment

Polished

Alloy

Special Use

B7 Studs

Main Quality Leverl

B7 L7 B16 B8

Surface

Polished Surface

Main Grade

B16 4140 Alloy Steel

Ready Stock

Yes

Transport Package

Anti-Rust Packaging

Specification

1/2''-4''

Trademark

dajin

Origin

China

Key features

ASTM A193 B7 Compliance: Fully compliant with ASTM A193 B7 mechanical requirements, ensuring 125 ksi tensile strength.

Customized Lengths: Available in various diameters (1/2''-3 1/4'') with custom lengths for immediate dispatch.

Precision Tolerances: Strict diameter tolerances (h9-h11) minimize material waste during thread-rolling.

Quality Assurance: Mill Test Report (MTR) provided for every batch, verifying chemical composition and strength.

High Strength Material: AISI 4140 alloy steel with chromium and molybdenum for high strength and toughness.

Ready Stock Availability: Maintains 1500-3000 tons of raw material in factory for stable supply.

Global Logistics Support: Expertise in export packaging, anti-rust bundling, and secure shipping to global hubs.

Versatile Application: Ideal for industrial fasteners, studs, and bolts requiring high-temperature resistance.

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: ≤9.25hTerms 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.