What is the lead time for orders?

Lead time is within 15 workdays during off-peak season and approximately one month during peak season.

What surface treatments are offered?

Options include Black Surface or Bright Surface, with polished finishes available for high-quality requirements.

4140 Alloy Steel Bar ASTM A193 B7 Threading Rod B16 Quality

Name: 4140 Alloy Steel Bar ASTM A193 B7 Threading Rod B16 Quality
Brand: Shandong Dajin Metal Material Co., Ltd.
SKU: 2183359252

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

ASTM A193 B7 Compliance: Meets strict mechanical requirements with 125 ksi tensile strength and full MTR verification.

Thread Rolling Ready: Cold drawn with specific pitch sizes for seamless thread rolling and optimal grain flow.

Customizable Dimensions: Available in various diameters (1/2"-3 1/4") with custom lengths tailored for export.

Superior Surface Quality: Strict diameter tolerances (h9-h11) minimize material waste during processing.

Comprehensive MTR Included: Every batch includes a Mill Test Report verifying chemical composition and mechanical properties.

High-Temperature Performance: Engineered for high-temperature and high-pressure bolting applications with uniform hardness.

Direct Factory Supply: Direct mill pricing with stable long-term supply capability for global fastener plants.

Advanced Heat Treatment: Quenched and tempered (Q&T) process ensures deep hardenability and structural integrity.

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: ≤7.55hTerms 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.