Custom AISI 4140 42CrMoA Alloy Steel Round Bar

Name: Custom AISI 4140 42CrMoA Alloy Steel Round Bar
Brand: Jiangsu Changchen Materials Co., Ltd.
SKU: 2148930962

Jiangsu, ChinaJiangsu Changchen Materials Co., Ltd.

US$760.00

1-49 Tons

US$750.00

50+ Tons

Sample price:US$1.00/kg.Request sample

Product profile

Customization

Available

Type

Alloy Steel Bar

Standard

AISI, ASTM, GB, JIS, DIN, BS

Model NO.

AISI 4140 Steel Round Bar

Technique

Hot Rolled

Application

Structural Steel Bar, Tool Steel Bar, Die Steel Bar

Surface Treatment

Polished

Alloy

Special Use

Mold Steel, Free Cutting Steel, Cold Heading Steel

Product Name

AISI 4140 Steel Round Bar

Size

6-300mm

Length

1m-9m

Grade

Grade B/X42/X52/X60/X70 L245/L290/S320/L360/L390

Applications

Thermal Heating Factories, Petrochemical

Transport Package

International Standards

Specification

Standard Specifications or Customized

Trademark

CHANGCHENG

Origin

Jiangsu, China

Production Capacity

300000tons/Year

Key features

One-Stop Deep Processing: Integrates cutting, heat treatment, and CNC turning to eliminate secondary outsourcing.

Full Quality Control: 100% spectral inspection of raw materials with third-party re-inspection supported.

Wide Material Standards: Covers DIN, EN, GB, ISO, JIS, BA, ANSI, and equivalent grades like AISI 4140.

Fast Delivery for Stock: Regular ready stock enables delivery within 3-7 days for standard orders.

Customized Production: Accepts small and large batch orders based on drawings, samples, and performance needs.

Comprehensive Heat Treatment: Offers quenching, tempering, annealing, normalizing, and vacuum heat treatment.

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: ≤4.86h

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:Are you a factory or a trading company?

We are an integrated manufacturer with our own factory and trading team. Welcome to visit our factory at any time.

Q:Can you support customized requirements?

We fully support on-demand customization, including material, specification, size, processing, and packaging customization to meet your project needs.

Q:What payment terms do you accept?

We accept T/T, Western Union, PayPal, etc. Specific terms can be negotiated based on order volume.

Q:What shipping methods do you offer?

We provide sea, air, and land transportation. We will recommend the most cost-effective solution based on your order volume and delivery time, or follow your designated shipping method.

Q:How can I get an accurate quotation?

Please provide us with the material, specification, quantity, processing requirements, and other detailed information of the round bar, and we will offer you an accurate price and customized solution promptly.