X120mn12 Steel
X120Mn12 steel is a high manganese austenitic steel with superior toughness, abrasion resistance, and work-hardening capability. Compared to Mn12, it delivers enhanced hardness and longer service life in high-impact, high-wear applications, making it an ideal choice for crusher liners, grinding mill liners, and heavy-duty wear components.
- Description
X120Mn12 is a high manganese austenitic steel widely used in wear-resistant and high-impact applications. It is characterized by excellent toughness, strong work-hardening ability, and high abrasion resistance.
This material is suitable for mining, crusher liners, grinding mills, earth-moving machinery, and other environments where heavy impact and severe wear occur.
Chemical Composition
The typical chemical composition of X120Mn12 ensures a balance between wear resistance and toughness:
| Element | Typical Range (wt%) | Function |
|---|---|---|
| Carbon (C) | 1.10 – 1.40 | Increases hardness and surface work-hardening |
| Manganese (Mn) | 11.0 – 14.0 | Austenite stabilization, toughness, wear resistance |
| Silicon (Si) | ≤ 1.0 | Deoxidation and improved strength |
| Phosphorus (P) | ≤ 0.07 | Controlled impurity |
| Sulfur (S) | ≤ 0.03 | Controlled impurity |
| Chromium (Cr) | ≤ 2.0 | Improves hardness and wear resistance |
| Nickel (Ni) | ≤ 1.0 | Enhances toughness |
| Iron (Fe) | Balance | Base metal |
Mechanical Properties
| Property | Typical Value |
|---|---|
| Yield Strength | 350 – 450 MPa |
| Tensile Strength | 750 – 1100 MPa |
| Elongation | ≥ 35% |
| Hardness (solution treated) | 180 – 220 HB |
| Hardness (work hardened) | Up to 500 HB |
Key Features:
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Strong work-hardening under repeated impact
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High toughness and ductility
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Excellent wear resistance after work hardening
-
Non-magnetic in solution-treated condition
Comparison with Mn12 Steel
| Feature | X120Mn12 | Mn12 |
|---|---|---|
| Carbon (C) | 1.10 – 1.40% | 0.90 – 1.20% |
| Manganese (Mn) | 11.0 – 14.0% | 11.0 – 13.0% |
| Hardness (solution treated) | 180 – 220 HB | 160 – 200 HB |
| Work-Hardened Hardness | Up to 500 HB | Up to 480 HB |
| Toughness | High | Moderate |
| Typical Use | Crusher liners, grinding mills, bucket liners | Chutes, hoppers, light-impact wear parts |
Summary: X120Mn12 offers higher carbon content and slightly higher manganese, resulting in better work-hardening ability and wear resistance compared to Mn12. While both steels are high manganese austenitic grades, X120Mn12 is generally preferred for heavier impact and extreme abrasion environments.
