What payment terms are accepted?

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

What is the maximum hardness of the product?

The maximum hardness is 35 HRC, which is close to 30 HRC to guarantee strength and machinability.

What diameter tolerances are available?

The product features precision h9 to h11 diameter tolerances, suitable for thread-rolling applications.

Premium ASTM A193 B7 Steel Rod with Tough 4140 Composition

Name: Premium ASTM A193 B7 Steel Rod with Tough 4140 Composition
Brand: Shandong Dajin Metal Material Co., Ltd.
SKU: 2182686522

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

High Precision Machinability: Cold drawn with h9-h11 tolerance, ideal for seamless thread rolling and minimal tool wear.

Superior Mechanical Strength: Min tensile strength 125 ksi with uniform hardness up to 35HRC via Quenched & Tempered process.

Full MTR Traceability: Comprehensive Mill Test Reports provided with full chemical and mechanical analysis per heat number.

Custom Material Grades: Available in 4140, B16, 304, 316 grades with customizable quality levels like B7, B8m, L7.

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

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 standards does the steel rod comply with?

The product complies with ASTM A193 Grade B7, AISI 4140, and other standards like GB, JIS, and ASTM A320 L7.

Q:Is the raw material grade customizable?

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

Q:What is the minimum tensile strength?

The minimum tensile strength is 125 ksi (860 MPa), ensuring high performance for fastener manufacturing.

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

Yes, each order includes a comprehensive MTR with full chemical analysis, heat treatment details, and mechanical test results traceable to the heat number.

Q:What is the lead time for orders?

The off-season lead time is within 15 workdays, while the peak season lead time is approximately one month.