Product Overview
Refined Grain Structure & Stable Hardness for Long Service Life
Our AISI 4340 Forge Rings, heat-treated to 300–350 BHN, are engineered for continuous rotation, heavy loads, and abrasive mining environments. Precision forging and controlled heat treatment produce rings with superior toughness, dimensional stability, and extended fatigue life. Full inspection documentation is provided for every shipment to ensure traceability and performance.
Forge Rings are essential rotating components for mills, heavy gear trains, hoisting systems, and crushers. Produced by controlled radial forging, the rings develop a continuous grain flow that improves impact resistance and fatigue performance. AISI 4340 base material gives high tensile strength while normalized plus quench-and-temper cycles ensure consistent hardness throughout the section. We deliver forge rings, stone forge rings, au ring and top rings with full inspection packages-chemistry, mechanical properties, UT, MT, hardness, surface roughness and geometric runout-so buyers receive reliable, traceable components for heavy-duty applications.
Technical Specifications
| Item | Specification |
|---|---|
| Material | AISI 4340 |
| Hardness | 300–350 BHN |
| NDT | UT + MT |
| Dimensional Tolerance | As per customer drawing / agreed tolerance |
| Surface Finish | Ra inspection provided |
| Typical Applications | Mining mills, gear rings, crushers, hoisting drums, rotary assemblies |
Quality Control
Hardness Checks
Multi-point hardness verification after Q&T processing.
UT Re-Verification
Core integrity validated prior to dispatch.
Final MT
Surface crack inspection after all machining operations.
Packaging & Shipping
Export-Ready Packaging & Global Shipping Solutions
Packing
Forge Rings are packed in fumigation-free wooden crates, coated with anti-rust oil and sealed with moisture barrier films. Rings are fixed with custom cradles or fixtures and reinforced with steel straps to prevent movement and deformation during sea or land transport.
Shipping
We support containerized (20GP / 40GP / 40HQ) and break-bulk shipments for oversized rings. Long-term freight partners and engineered lifting plans ensure safe loading and timely delivery.
FAQ
Most Asked Questions
Buyer-Focused Answers for Faster Purchase Decisions
What is the typical lead time for Forge Rings?
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Typical lead time: 20–30 days for standard sizes; 30–45 days for custom designs depending on machining and heat-treatment complexity.
What material certifications do you provide?
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We supply chemistry and mechanical composition reports, heat-treatment curves (normalizing & Q&T), UT & MT reports, hardness certificates, dimensional and geometric runout reports, and surface roughness reports.
Can you manufacture non-standard forged rings?
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Yes. We customize diameter, thickness, machining steps, hardness targets, and heat-treatment requirements.
How do you guarantee the hardness range 300–350BHN?
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Automated temperature control, strict quench & temper schedules, and multi-section hardness testing ensure consistent 300–350 BHN across production.
How do you support overseas shipping?
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Export-grade fumigation-free crates, anti-rust treatment, moisture sealing and engineered lifting plans are provided; we coordinate container or break-bulk options.
Inquiry
For quotations, technical drawings, or tailored forge rings solutions, contact ZM INDUSTRY CO., LTD. Our engineering team will review your specs, propose optimized material and heat-treatment plans, and deliver a full inspection package with each order. Send drawings and requirements to our sales team for a fast, detailed reply.
Tel
+8618606381772
18606381772
sun@zmindu.cn
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