What quality inspection standards are used?

We perform 100% Ultrasonic testing according to standards SEP1921-84 and GR.3 CLASS C/C.

What are the common applications for these bars?

They are used for statically and dynamically stressed components in vehicles, engines, machines, crankshafts, and gears.

What payment terms do you accept?

We accept LC, T/T, D/P, and Western Union for payment.

4140 42CrMo 4150 4145h Alloy Steel Round Bars

Name: 4140 42CrMo 4150 4145h Alloy Steel Round Bars
Brand: Shandong Dajin Metal Material Co., Ltd.
SKU: 735933672

Shandong, ChinaShandong Dajin Metal Material Co., Ltd.

US$700.00-900.00

10 Tons

Sample price:US$1.00/piece.Request sample

Product profile

Customization

Available

Type

Round

Standard

AISI, ASTM, DIN, JIS, GB

Model NO.

alloy steel bar

Composition

Alloy Steel or Carbon Steel

Technique

Forged

Shape

Bar

Surface Treatment

Rough Machining or Black Surface

Special Use

Cold Heading Steel, Free Cutting Steel

Application

Structural Steel Bar

Main Grade

1045 Ck45 S355jr 4140 4340 8620

Surface

Rough Turning Surface or Black Surface

Tolerance

-0/+5mm

Length

Cut According to Client's Request

Alloy Steel

Alloy Round Bar

Transport Package

Seaworthy Packaging

Specification

200mm-1000mm

Trademark

customized

Origin

China

Production Capacity

2000tons

Key features

Wide Grade Selection: Available in 4140, 42CrMo, 4150, 4145h, SCM440, and other alloy steel grades.

Large Diameter Range: Round bars with diameters from 16mm to 1000mm for various structural needs.

Custom Length Cutting: Lengths can be cut according to client's specific request requirements.

Strict Quality Inspection: 100% Ultrasonic testing performed according to SEP1921-84 and GR.3 standards.

Multiple Surface Options: Options include rough turning, black surface, peeled, or hot rolled finishes.

Versatile Heat Treatment: Supports annealing, hardening, normalizing, and tempering processes.

Standard Compliance: Meets AISI, ASTM, DIN, JIS, and GB international steel standards.

Fast Delivery Time: Standard delivery within 30 days after order confirmation.

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: ≤7.47hTerms 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.