What payment terms are accepted?

We accept LC, T/T, D/P, and Western Union as terms of payment.

What are the main applications for this steel bar?

It is primarily used for manufacturing B7/L7/B16 stud bolts and threaded rods in the oil & gas, petrochemical, power generation, and offshore marine industries.

Ready Stock High-Quality SAE4140 Steel for B7 Threading

Name: Ready Stock High-Quality SAE4140 Steel for B7 Threading
Brand: Shandong Dajin Metal Material Co., Ltd.
SKU: 2182582042

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

Ready Stock Availability: In-stock items available for immediate dispatch, ensuring fast delivery for urgent orders.

Thread-Rolling Optimized: Cold drawn with h9-h11 tolerance, ensuring minimal tool wear and high precision in threading.

Full MTR Traceability: Every order includes a Mill Test Report verifying chemical and mechanical properties against ASTM A193 B7.

Superior Mechanical Strength: Quenched & Tempered process guarantees min 125 ksi tensile strength and max 35 HRC hardness.

Export-Ready Packaging: Top-tier anti-rust solutions and fortified packing protect materials during extended sea voyages.

Factory Direct Supply: Direct from manufacturer ensures competitive pricing and consistent quality control.

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: ≤10.14hTerms 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 grade and material composition?

The product is AISI 4140 Alloy Steel, compliant with ASTM A193 Grade B7. It features a specific chemical composition including Carbon (0.37-0.49%), Chromium (0.75-1.20%), and Molybdenum (0.15-0.25%).

Q:What are the mechanical properties of the steel bar?

The steel offers a minimum tensile strength of 125 ksi (860 MPa) and a maximum hardness of 35 HRC. It undergoes a Quenched & Tempered (Q&T) process for consistent performance.

Q:Is customization available for raw materials?

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

Q:What is the lead time for orders?

Lead times vary by season: Peak season requires one month, while the off-season lead time is within 15 workdays.

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

Yes, every order is delivered with an in-depth MTR that includes chemical analysis, heat treatment details, mechanical test results, and traceability to the original heat number.