How about your delivery time?

Normally 7-20 working days after receiving deposit. The lead time depends on order quantity and product specifications.

What surface options are available for alloy steel square bar?

We provide black hot rolled surface, peeled smooth surface and bright cold drawn surface. You can choose the surface finish according to your processing needs.

What is the tolerance level you can achieve?

We can supply standard dimensional tolerance, and tight tolerance such as h9/h11 is available for cold drawn alloy square bar as customer requirements.

40crmnmo Hot Rolled Alloy Steel Square Bar Alloy Solid Square Bar for Forging and Machining

Name: 40crmnmo Hot Rolled Alloy Steel Square Bar Alloy Solid Square Bar for Forging and Machining
Brand: Jiangsu Changchen Materials Co., Ltd.
SKU: 2003617071

Jiangsu, ChinaJiangsu Changchen Materials Co., Ltd.

US$1,480.00

1-4 Tons

US$1,440.00

5-9 Tons

US$1,400.00

10+ Tons

Product profile

Customization

Available

Type

Alloy Steel Bar

Standard

AISI, ASTM, DIN, JIS, GB

Model NO.

40CrMnMo Hot Rolled Alloy Steel Square Bar

Composition

Cr-Mn-Mo Alloy Steel 40crmnmo

Technique

Hot Rolled

Shape

Square

Surface Treatment

Black Hot Rolled Surface

Special Use

Automotive / Machinery / Engineering Equipment

Application

Automotive / Machinery Manufacturing

Grade

40crmnmo

Material Category

Chromium-Manganese-Molybdenum Alloy Structural Ste

Main Application

Heavy Load Gear, Shaft, Forging Blank, Engineering

Delivery Condition

Hot Rolled, Black Surface

Delivery Length

3m, 6m, 9m, 12m or Custom Cut to Length

Transport Package

Bundled with Steel Strips + Waterproof Plastic Wra

Specification

Side: 10~300mm

Trademark

OEM & ODM, Custom brand acceptable

Origin

China

HS Code

7228309000

Production Capacity

5000000

Key features

Multiple Alloy Grades: Supply 40Cr, 42CrMo, 20CrMnTi, 20Cr, 4140, 4340, 40CrNiMoA and custom grades.

Customizable Dimensions: Side width 10-300mm and fixed cutting lengths available based on drawings.

Versatile Manufacturing: Hot rolled, peeled, or cold drawn processes to meet specific customer demands.

High Performance: Features high hardness, tensile strength, wear resistance, and excellent machinability.

Mill Test Certificate: MTC provided with every batch to support third-party inspection.

Wide Application Scope: Used in machinery, construction, auto, petrochemical, mining, and agriculture.

Strict Quality Control: Batch-by-batch raw material inspection, dimension check, and mechanical testing.

OEM & ODM Service: Custom brand and design customization available for samples and drawings.

Company profile

Fast DeliveryManagement CertificationR&D CapabilitiesQA/QC Inspectors

Jiangsu Changchen Materials Co., Ltd.

Jiangsu, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs CertifiedExport Year: 1 Year CertifiedNearest Port: Shanghai PortAverage Response Time: ≤4.61h

AI-Powered supplier vetting

SummaryChangchen operates in metal materials, special steel, forgings, powder metallurgy, metal processing machinery, and cutting services. It reports customization from samples and designs, ODM availability, recent new-product development, CAD/PS-related R&D capability, and documented R&D inputs, outputs, reviews, verification, and validation. Production-related evidence includes valid contracts with associated subcontractors, inventory capability, raw-material traceability, and 100% finished-product inspection; however, only one quality inspector is reported. The supplier states that products can meet several national and international standards, but no specific certifications are identified. Overseas support is limited: there are no overseas agents or branches, warehouses, showrooms, or stated overseas service countries. Lead time is reported as within 15 working days in both peak and off-season. Financial information is insufficient for a reliable assessment, and no customer cases are provided.

Supplier typeThe supplier’s stated business scope covers sales of metal materials and products, special steel, forgings, powder metallurgy products, recycled resources, metal-processing machinery, and metal cutting services. This supports classification as a metal-material and metal-processing supplier, although the slices do not establish a more specific legal or manufacturing classification.

R&D capabilityThe supplier reports new products during the past year, R&D responsibilities covering new-product development, design drawings, production technical support, and customer specifications, plus CAD and PS software capability. It also has auditable R&D design-input, output, review, verification, and validation documentation, although no SDK is available.

Production capacityProduction-related evidence includes sawing and cutting equipment, metal cutting and processing activities, inventory capability, valid manufacturing contracts with associated subcontractors, raw-material traceability, and 100% finished-product inspection. The reported quality-control staffing is one inspector, while supplier-management procedures have no records, so capability is supported but operational depth is limited.

Customization capabilityChangchen explicitly provides customization from samples and designs, offers ODM services, and states that customized services can be developed according to customer requirements. Its R&D role includes preparing product specifications for customer approval, providing direct evidence of customer-oriented customization capability.

Product Q&A

Q:What alloy steel grades of square bar can you supply?

We can supply multiple alloy steel grades including 40Cr,42CrMo,20CrMnTi,20Cr,4140,4340,40CrNiMoA. Other custom alloy grades are also available upon request.

Q:Can you produce non-standard sizes and cut to fixed length?

Yes. We support custom side width and fixed cutting length. Non-standard dimensions can be manufactured strictly according to your drawings and technical requirements.

Q:What standards can your alloy steel square bar meet?

Our alloy square bar complies with GB/T3077, ASTM A29, ASTM A331, DIN 17200, JIS G4053. We can follow the specified standard from customers.

Q:What trade terms do you accept?

We mainly quote FOB price. CFR, CIF and other trade terms can also be negotiated.

Q:Can you provide Mill Test Certificate for each batch?

Yes, MTC mill test certificate will be provided together with goods, and third-party inspection is acceptable.