What industries is this product suitable for?

It is widely used in oil and gas, petrochemical, power generation, offshore/marine, and pressure vessel applications for fastener manufacturing.

How is the product packaged for export?

Materials undergo professional anti-rust treatment and are encapsulated in reinforced packaging to prevent damage during maritime transport.

What is the surface treatment and finish?

The bars are cold drawn and polished, with surface conditions available as cold drawn or centerless ground to meet precision requirements.

ASTM A193 Grade B7 4140 Qt Steel Rod Threaded Bar

Name: ASTM A193 Grade B7 4140 Qt Steel Rod Threaded Bar
Brand: Shandong Dajin Metal Material Co., Ltd.
SKU: 2182768202

Shandong, ChinaShandong Dajin Metal Material Co., Ltd.

US$1,050.00

2 Tons

Sample price:US$1.00/piece.Request sample

Product profile

Customization

Available

Standard

AISI, ASTM, GB, JIS, ASTM A193 B7 B16,ASTM A320 L7

Technique

Cold Drawn

Model NO.

round bar

Application

B7 L7 B16 Threading Rod

Surface Treatment

Polished

Alloy

Special Use

B7 L7 B16 Studs

Raw Material Grade

4140 B16 304 316 etc.

Quality Level

B7 B8m B16 L7

Ready Stock

Yes

Factory Directly

Yes

Transport Package

Anti-Rust Pacakging

Specification

1/2''-4''

Trademark

dajin

Origin

China

Production Capacity

5000

Key features

ASTM A193 Grade B7 Compliance: Meets strict ASTM A193 Grade B7 standards for high-temperature and high-pressure applications.

Superior Machinability: Optimized tensile strength and hardness (max 35HRC) for efficient thread-rolling and machining.

Consistent Grain Structure: Cold drawn and Q&T process ensures uniform hardness and precision h9-h11 diameter tolerances.

Full MTR Traceability: Includes detailed Mill Test Report with chemical analysis and mechanical property verification.

Customizable Material Grades: Raw material grades include 4140, B16, 304, 316 etc., tailored to specific project needs.

Export-Ready Packaging: Professional anti-rust treatment and reinforced packaging ensure integrity during maritime transport.

Wide Industry Application: Ideal for oil & gas, petrochemical, power generation, and offshore marine fastener manufacturing.

Ready Stock Availability: In-stock items available for immediate dispatch, reducing lead times for urgent projects.

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 is the standard and grade of this steel bar?

The product complies with ASTM A193 Grade B7 and AISI 4140 standards, suitable for high-temperature and high-pressure service.

Q:What are the mechanical properties of Grade B7 steel?

It features a minimum tensile strength of 125 ksi, yield strength of 105 ksi, and maximum hardness of 35HRC, ensuring high durability.

Q:Is the material customizable for different grades?

Yes, we offer customization for raw material grades including 4140, B16, 304, and 316, as well as specific quality levels like B7, B8m, and L7.

Q:Do you provide Mill Test Reports (MTR) with orders?

Yes, every order includes a comprehensive MTR detailing chemical composition, heat treatment details, and mechanical test results for full traceability.

Q:What are the payment terms and lead times?

Payment terms include LC, T/T, D/P, and Western Union. Lead time is within 15 workdays off-season and one month during peak season.