Is the material ready for thread rolling?

Yes, our bars come with specific pitch sizes optimized for automatic lathe turning and high-speed thread rolling.

What are the available size ranges?

Diameters range from 1/2 inch to 3 1/4 inches with various pitch sizes ready for threading.

What payment terms do you accept?

We accept LC, T/T, D/P, and Western Union for international transactions.

Bright Surface Threaded Rod ASTM A193 B7 4140 Steel Bar

Name: Bright Surface Threaded Rod ASTM A193 B7 4140 Steel Bar
Brand: Shandong Dajin Metal Material Co., Ltd.
SKU: 2178830642

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

Standard

AISI, ASTM, GB, JIS, DIN, ASTM A193 Astma320

Technique

Cold Drawn

Application

ASTM A193 Astma320

Surface Treatment

Polished

Alloy

Special Use

ASTM A193 Astma320

Main Quality Level

ASTM A193 B7 B16 B8m A320 L7

Raw Material Grade

4140 5140 B16 304 316

Surface

Black Surface or Bright Surface

Size

Pitch Size Ready for Threading

Transport Package

Anti-Rust Packaging

Specification

1/2''-4''

Trademark

dajin

Origin

China

Key features

High-Temperature & Pressure Grade: ASTM A193 B7 and AISI 4140 engineered for extreme high-temp and high-pressure bolting.

Thread Rolling Ready: Pre-cut pitch sizes ensure optimal grain flow and uniform hardness for immediate threading.

Comprehensive MTR Certification: Every batch includes full Material Test Reports verifying chemical and mechanical properties.

Customized Length Options: Tailored lengths available for export container loading and specific client fabrication lines.

Strict Diameter Tolerances: Precision h9-h11 tolerances minimize material waste during the thread-rolling process.

Quenched & Tempered Process: Advanced Q&T heat treatment ensures superior cleanliness and mechanical integrity.

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

Verified Tensile Strength: Fully compliant with ASTM A193 B7 requirements, delivering 125 ksi tensile strength.

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.