Forged Chain

Product Overview

Drop-forged rivetless chains and heavy-duty forged conveyor chains utilize high-strength alloy steel links engineered for extreme material handling and overhead transport systems. Unlike stamped or cast alternatives, the continuous grain flow of drop-forged steel follows the precise contour of the component, delivering maximum structural integrity, impact resistance, and fatigue life under cyclical heavy loads.

SCD Forged Chain

The SCD forged chain is a new type of chain product offering advantages such as high strength, excellent wear resistance, and high toughness. It is widely used in mechanical equipment, metallurgy,

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MS Forged Scraper Chain

MS forged scraper chains are generally used for horizontal conveying. During operation, the material is subjected to pressure from the scraper chain in the direction of movement as well as its own

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Suspended Conveyor Chain

The suspended conveyor chain is the core component of a suspended conveyor system and the primary load-bearing part of industrial conveying equipment. It is mainly used for overhead material handling

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Non-standard Forgings

Non-standard forgings refer to customized forged components that do not conform to national standards (such as GB/T). They can be manufactured according to customer drawings or process requirements,

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Types & Configurations

Drop-Forged Rivetless Chain (X-Series):

Open-construction design consisting of a pin, two sidebars, and a center link; allows rapid assembly and disassembly without specialized tools while articulating smoothly around horizontal and vertical track curves in overhead conveyor systems.

Forged Scraper/Drag Chain:

Heavy-section solid links featuring integrated or welded flights designed to pull abrasive bulk materials through enclosed troughs.

Detachable Forged Chain:

Engineered for agricultural drives and low-speed industrial equipment requiring manual link separation and rapid field maintenance.

Materials & Construction

Alloy Steel Selection: Fabricated from medium-carbon alloy steels (AISI 1045, 40Cr) and case-hardening steels (AISI 8620) to balance core toughness and surface wear resistance.

Grain Structure Optimization: Multi-stage drop forging aligns the micro-structure along the principal load axis, eliminating internal voids, micro-shrinkage, and directional weaknesses typical of steel castings.

Heat Treatment Profile: Pins and links undergo induction hardening or carburizing to achieve a surface hardness of HRC 58 to 62 with a case depth of 1.5 to 2.5 mm, preserving a ductile core of HRC 30 to 35 to absorb mechanical shock and prevent brittle fracture.

Key Features

High Strength-to-Weight Ratio: Delivers high ultimate tensile strength without excessive dead weight, reducing overall drive motor energy consumption on long conveyor runs.

Multi-Plane Articulation: Pin-and-hole clearances permit complex three-dimensional movement through tight-radius overhead conveyor layouts.

Wear Surface Hardening: Induction-hardened pin-bearing zones minimize elongation during extended operation in abrasive environments.

Technical Specifications

Chain Designation	Pitch (mm / in)	Ultimate Tensile Strength (kN / lbs)	Working Load Limit (kN / lbs)	Pin Diameter (mm)	Approximate Weight (kg/m)
X-348	76.2 / 3.000	111 / 25,000	22.2 / 5,000	14.3	4.2
X-458	101.6 / 4.000	222 / 50,000	44.4 / 10,000	19.1	7.8
X-678	152.4 / 6.000	356 / 80,000	71.2 / 16,000	25.4	14.5
F-100 (Drag)	100.0 / 3.937	280 / 62,900	56.0 / 12,500	22.0	11.2

Applications

Automotive Paint & Assembly Lines: Overhead trolley conveyors carrying vehicle bodies through dip tanks, pre-treatment spray booths, and baking ovens operating at temperatures up to 250 degrees C.

Bulk Material Handling: Enclosed belt conveyors, bucket elevators, and drag chains moving cement clinker, coal, grain, and wood pellets.

Sugar Mills & Pulp Processing: High-capacity bagasse and bark conveying systems where moisture, abrasive debris, and heavy shock loads accelerate mechanical wear.

Manufacturing & Quality Control

Forging Operations:

1600T hydraulic friction presses shape pre-heated bar stock at 1200 degrees C, followed by monitored cooling cycles to eliminate internal residual stresses.

Machining & Broaching:

CNC vertical machining centers maintain pin-hole center-to-center pitch tolerances within +/- 0.15 mm to ensure balanced load distribution across all engaged links.

Metallurgical Verification:

Optical emission spectrometers analyze raw material chemistry; metallographic microscopes measure case-hardening depth and grain size after heat treatment.

Proof Load Testing:

Every production batch undergoes a 33 percent ultimate tensile proof load test on a 100-ton horizontal tensile testing machine prior to release.

Customization & OEM

Pitch & Dimension Matching: Reverse engineering from worn physical samples or customer CAD models to match legacy European, American, or Japanese conveyor specifications.

Surface Finishes: Zinc plating, nickel plating, or high-temperature black oxide coatings applied for corrosive chemical or high-humidity operating environments.

Custom Attachments: Specialized welded flights, extended pins, or side-roller configurations built to match custom track profiles.

Selection Guide

Calculate Maximum Chain Pull:

Determine total conveyed mass, friction coefficients, and incline angles to establish the required Working Load Limit (WLL) using a minimum safety factor of 5 to 1.

Evaluate Operating Environment:

Select case-hardened alloy steel for abrasive mineral dust; specify high-temperature alloy pins for continuous service temperatures exceeding 200 degrees C.

Verify Sprocket Geometry:

Match chain pitch, tooth profile, and roller/pin engagement dimensions to eliminate chordal action and prevent premature tooth wear.

Determine Lubrication Strategy:

Specify dry-film lubrication for paint lines where oil contamination is restricted, or automated forced-lubrication systems for high-speed drag conveyors.

FAQ

Q: What is the standard delivery lead time for non-standard pitch forged chains?

A: Tooling verification and prototype forging require 25 to 30 days, while regular production batches ship within 35 to 45 days from formal drawing approval.

Q: Are your forged chains dimensionally compatible with universal industry standards?

A: Yes. Pin diameters, sidebar thicknesses, and pitch dimensions match standard X-series specifications for direct drop-in replacement on existing standard tracks.

Q: What quality documentation accompanies each shipment?

A: Each delivery includes a Material Test Report (MTR) detailing chemical composition, hardness test logs, and proof load test certificates traceable to the specific raw material heat number.

Q: How do you control initial chain elongation during installation?

A: Precision induction hardening of pin-hole bearing surfaces restricts initial bed-in wear, keeping pitch elongation below 0.1 percent during the first 500 operating hours.

Q: Can these chains operate inside continuous high-temperature baking ovens?

A: Yes, when manufactured using specific heat-resistant alloy steels and high-temperature dry lubricants, they maintain structural stability up to 350 degrees C.

Q: What is the minimum order quantity (MOQ) for custom-engineered attachment links?

A: MOQ is dictated by forging die tooling setup costs, typically starting at 500 meters or 1,000 individual link assemblies per production run.

We are one of the most experienced forged chain manufacturers and suppliers in China since 1999. Please rest assured to buy high quality forged chain made in China here from our factory. If you have any enquiry about cooperation, please feel free to email us.

SCD Forged Chain, Suspended Conveyor Chain, Non standard Forgings