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Polished B7 Threaded Rod for Enhanced Durability and Quality
US$1,050.00
3 Tons
Sample price:US$0.00/piece.Request sample
Product profile
Customization
AvailableAfter-sales Service
1 YearWarranty
1 YearModel NO.
round barType
Alloy Steel BarStandard
AISI, ASTM, GB, JISTechnique
Cold DrawnApplication
B7 Threading RodSurface Treatment
PolishedAlloy
AlloySpecial Use
B7 StudsMain Quality Leverl
B7 L7 B16 B8Surface
Polished SurfaceMain Grade
B16 4140 Alloy SteelReady Stock
YesTransport Package
Anti-Rust PackagingSpecification
1/2''-4''Trademark
dajinOrigin
ChinaKey features
ASTM A193 B7 Compliance: Fully compliant with ASTM A193 B7 mechanical requirements, ensuring 125 ksi tensile strength.
High Strength Alloy Steel: AISI 4140 Cr-Mo alloy steel with quenched and tempered treatment for superior toughness and fatigue strength.
Precision Diameter Tolerance: Strict h9-h11 diameter tolerance minimizes material waste during the thread-rolling process.
Ready Stock Availability: Maintains 1500-3000 tons of raw material in factory for immediate dispatch and stable supply.
Customized Length Options: Custom lengths available for export, tailored to container loading and specific client fabrication lines.
Comprehensive Quality Assurance: Every batch includes Mill Test Report (MTR) verifying chemical composition, tensile strength, and impact properties.
Versatile Size Range: Available in various diameters from 1/2'' to 3 1/4'' with customized pitch sizes for standard and special requirements.
Global Logistics Support: Expertise in export packaging, anti-rust bundling, and secure shipping to Middle Eastern and Southeast Asian hubs.
Company profile

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.
Product Q&A
Q:What is the material grade and standard?
A:
The product is AISI 4140 (Cr-Mo Alloy Steel) compliant with ASTM A193 Grade B7 standard.
Q:What is the tensile strength and hardness?
A:
Minimum tensile strength is 125 KSI (860 Mpa), with hardness max 35 HRC, usually close to 30 HRC.
Q:What surface treatment and technique are used?
A:
The rods undergo cold drawn, centerless ground, and polished surface treatment with quenched and tempered (Q&T) heat treatment.
Q:What is the warranty period for this product?
A:
We provide a 1-year warranty and after-sales service for this product.
Q:What is the typical lead time for orders?
A:
Lead time is within 15 workdays during off-season and one month during peak season.
Send Inquiry
*To:
Shandong Dajin Metal Material Co., Ltd.
Shandong Dajin Metal Material Co., Ltd.*Content:
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