Hot Rolled 40cr Alloy Structural Round Bar GB/T3077 with Mtc Certificate

Name: Hot Rolled 40cr Alloy Structural Round Bar GB/T3077 with Mtc Certificate
Brand: Jiangsu Changchen Materials Co., Ltd.
SKU: 1998178951

Jiangsu, ChinaJiangsu Changchen Materials Co., Ltd.

US$660.00

1-49 Tons

US$650.00

50+ Tons

Product profile

Customization

Available

Type

Alloy Steel Bar

Standard

AISI, ASTM, DIN, JIS, GB, BS

Model NO.

GB/T 3077-2015

Composition

Chromium Alloy

Technique

Hot Rolled

Shape

Bar

Surface Treatment

Black Hot Rolled

Special Use

Structural Alloy Steel for Shaft & Gear

Application

Structural Steel Bar

Product Name

40cr GB/T3077 Hot Rolled Alloy Structural Round Ba

Size

φ32mm ~ φ140mm

Length

5500mm / 6000mm / 10900mm / 7000mm

Grade

40cr / AISI 4140 / GB/T3077-2015

Applications

Auto Shaft, Machinery Gear, Engineering Components

Transport Package

International Standards

Specification

Standard Specifications or Customized

Trademark

CHANGCHENG

Origin

Jiangsu, China

HS Code

7228309000

Production Capacity

300000tons/Year

Key features

Premium 40Cr Alloy Steel: Fully equivalent to AISI 4140 and DIN 1.7225 for heavy-load mechanical components.

Optimized Heat Treatment: Quenching and tempering achieve 22-32 HRC hardness with balanced wear resistance.

Comprehensive Certifications: Includes EN10204 3.1 MTC, chemical reports, and 100% ultrasonic testing.

Traceable Quality Control: Full heat-number traceability from well-known mills like Shagang and Nanjing Iron.

Fast Delivery Options: Ready stock delivery within 3-7 days; urgent orders negotiable for on-time arrival.

Versatile Applications: Ideal for automotive shafts, machinery gears, and engineering components.

Professional Packaging: Moisture-proof, rust-proof materials with palletization for safe international shipping.

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: ≤3.17h

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.