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Henan San Kuang Machinery Technology Co., Ltd. is a professional manufacturer of wear-resistant mill liners, offering the ASTM A532 Grade III Chrome-Moly Alloy Steel Mill Liner with HB 400 Hardness designed specifically for ball mill applications. With a factory spanning 10,000–30,000 square meters and a dedicated team of 51–100 skilled employees, we combine advanced metallurgy with precision casting to deliver liners that maximize grinding efficiency and extend equipment life. Our liners are engineered to withstand the harshest milling environments, providing consistent performance and reduced downtime for our global clients.
This mill liner is manufactured to meet the stringent requirements of ASTM A532 Grade III, a standard for abrasion-resistant white iron castings. The chrome-moly alloy composition ensures superior wear resistance, while the achieved hardness of HB 400 guarantees long service life even under high-impact and high-abrasion conditions. Each liner is produced through a controlled casting process, followed by heat treatment to optimize the microstructure for maximum toughness and hardness.
Key Features & Benefits
- Exceptional Wear Resistance: Chrome-moly alloy matrix with high chromium carbide content effectively resists abrasive wear, reducing replacement frequency.
- Optimized Hardness (HB 400): Balanced hardness-to-toughness ratio minimizes cracking while maintaining excellent abrasion resistance.
- Customizable Design: Available in various profiles (wave, step, lifter bar) to match specific mill dimensions and grinding requirements.
- Consistent Quality: Strict process control from raw material sourcing to final inspection, backed by ISO9001 certified management system.
- Enhanced Grinding Efficiency: Proper liner profile promotes effective ball motion and material flow, leading to higher throughput per mill charge.
- Longer Service Life: Field-proven performance in cement, mining, and mineral processing industries, with typical lifetime exceeding conventional manganese steel liners.
- Easy Installation: Precision-machined mounting holes and accurate dimensions ensure seamless fit and reduced installation time.
Technical Specifications
| Parameter | Value / Description |
|---|---|
| Material Grade | ASTM A532 Grade III (Chrome-Moly Alloy) |
| Hardness (HB) | 400 (minimum) |
| Chemical Composition (Typical) | C: 2.5–3.5%, Cr: 15–20%, Mo: 1–3%, Mn: 0.5–1.5%, Si: 0.3–1.0% |
| Microstructure | Martensitic matrix with M7C3 carbides |
| Application | Ball mills for cement, mining, power generation, and mineral processing |
| Available Sizes | Customizable per customer drawing; typical thickness 50–150 mm |
| Packaging | Steel pallets, wooden crates, or customized packaging for export |
The Chrome-Moly alloy composition provides a unique combination of high hardness (HB 400) and impact toughness, making these liners ideal for secondary and regrind ball mills where both abrasion and impact are present. Compared to traditional high-manganese steel, our ASTM A532 Grade III liners offer up to 2–3 times longer service life, reducing total cost of ownership.
Why Choose Henan San Kuang?
As a manufacturer established in 2022, we have rapidly grown to serve clients across North America, South America, Europe, Southeast Asia, Africa, Oceania, and the Middle East. Our annual export value exceeds US$2.5 million, reflecting the trust and satisfaction of our global partners. We hold multiple certifications including ISO9001, ISO14000, OHSAS18001, and HACCP, ensuring that every product meets rigorous quality and environmental standards. Our factory is equipped with modern casting lines, heat treatment furnaces, and CNC machining centers, enabling us to deliver precise, high-quality liners with short lead times.
We understand that each mill has unique operating conditions. That’s why we offer customized solutions – from liner profile design to material optimization – based on the specific ore type, mill speed, and product fineness. Our technical team provides drawings and simulations to ensure the best fit and performance. With shipping ports in Shanghai, Lianyungang, Qingdao, and Tianjin, we ensure efficient logistics to any destination worldwide.
Invest in durability and productivity. Contact us today for a quote or technical consultation. Our team is ready to support your grinding operations with premium liners that deliver measurable results.
Frequently Asked Questions (FAQ)
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Q: What is the typical hardness of this liner?
A: The liner is designed to achieve a minimum hardness of HB 400, confirmed through standard Brinell testing. -
Q: Can you customize the liner dimensions for our ball mill?
A: Yes, we offer full customization based on your mill drawings or field measurements. We can produce any thickness, length, and bolt pattern. -
Q: How does this liner compare to manganese steel liners?
A: Chrome-moly alloy liners (ASTM A532 Grade III) have significantly higher hardness and wear resistance, lasting 2–3 times longer in abrasive environments, though they are less impact-resistant than manganese steel. For ball mills with moderate impact, they are the preferred choice. -
Q: What is the minimum order quantity (MOQ)?
A: Our MOQ is typically 1 ton for standard sizes, but we can accommodate smaller trial orders for first-time customers. -
Q: Do you provide heat treatment reports?
A: Yes, we provide material test certificates (MTC) including chemical composition, hardness, and heat treatment records upon request. -
Q: What is the lead time for custom orders?
A: Lead time depends on quantity and complexity, typically 30–45 days after drawing approval. We can expedite for urgent orders. -
Q: How do you ensure the quality of the liners?
A: We follow ISO9001 quality management system, with in-process inspection, ultrasonic testing for internal defects, and final dimensional checks. Every batch is traceable. -
Q: Can you supply additional accessories like bolts or rubber backing?
A: Yes, we can supply matching bolts, nuts, and rubber backing plates as optional accessories to complete the liner installation.
Henan San Kuang Machinery Technology Co., Ltd. – Your reliable partner for wear-resistant mill liners. Contact us for a customized solution that boosts your grinding efficiency.
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