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Cr-Mo Alloy Liners are specialized mill liners crafted from chromium-molybdenum steel, designed for AG mills, SAG mills, and ball mills in mineral processing . With over 20 years of manufacturing expertise, these liners balance high wear resistance and impact tolerance, making them ideal for thin-section applications and discharge grates. Compliant with AS 2074 L2B/L2C standards, they outperform standard steel liners in harsh milling environments.
The Cr-Mo alloy delivers a hardness range of 33-42 HRC while maintaining an impact value of ≥10 J, preventing cracking in high-impact mill operations . This balance is critical for discharge grates and thin liners where brittleness is a common failure point.
Combining sand casting and air quenching, we achieve a uniform martensitic matrix that enhances surface hardness and internal toughness . The process eliminates porosity, ensuring consistent performance across the entire liner surface.
Adherence to AS 2074 standards guarantees compatibility with global mill designs, and strict chemical composition control (P/S <0.06%) ensures long-term reliability .
Parameter | AS 2074 L2B Specification | AS 2074 L2C Specification |
Hardness | 33-38 HRC (HB 310-350) | 38-42 HRC (HB 350-375) |
Impact Value | ≥10 J | ≥10 J |
Carbon Content | 0.55-0.65% | 0.70-0.90% |
Chromium Content | 0.80-1.50% | 1.30-2.40% |
Molybdenum Content | 0.20-0.40% | 0.20-0.40% |
Manufacturing Process | Sand casting + Air quenching | Sand casting + Air quenching |
Used as primary liners in autogenous and semi-autogenous mills, where they withstand impact from large ore particles while reducing wear on mill shells .
Ideal for secondary grinding stages in mining, processing iron ore, copper ore, and non-ferrous metals . The liners’ toughness prevents damage from grinding media collision.
Specially designed for mill discharge sections, where their impact resistance outperforms higher-carbon chrome-moly steels .
Cr-Mo liners offer 40% higher wear resistance and double the impact tolerance of standard steel. The molybdenum additive enhances high-temperature strength, making them suitable for continuous mill operations .
Yes. We produce liners in custom thicknesses (10-100mm) and dimensions using client-provided mill drawings. Customization ensures optimal coverage and minimal gap between liner segments .
Each batch undergoes hardness testing (HB/HRC), chemical composition analysis (XRF), and impact toughness measurements. We also provide SGS-certified test reports upon request .