X120MN12 Grade Manganese Plates and Sheets
X120MN12 manganese steel, also known as hard manganese steel, is renowned for its unique properties. It becomes significantly harder and more wear-resistant through intense cold working while maintaining high durability.
Key Features
- Strength and Hardness
- In its quenched state, manganese steel enhances its low initial tensile strength and hardness through cold working.
- The cold-worked layer becomes highly wear-resistant without compromising durability.
- Versatility
- The material can be bent, flanged, and pierced due to its excellent flexibility.
- Chipping at room temperature is possible but limited, requiring hard metal tools.
Typical Applications
Manganese steel is ideal for parts exposed to heavy percussion and impact stresses, including:
- Hangers in blasting machines
- Crusher jaws and inserts
- Power shovel bolts and connectors
- Gripping teeth
- Impact and centrifugal mills
- Protective grills, cladding, doors, and safety plates
Welding Properties
- Welding Methods
- Manganese steel can be welded electrically or autogenously, though electrical welding is preferred.
- Autogenous welding risks manganese and carbon burn-off.
- Recommended Materials
- Shielded electrodes with 0.8%-1.0% carbon and 15%-18% manganese are used for electric welding.
- Weld seams exhibit slightly lower wear resistance compared to the base material.
Summary
X120MN12 manganese steel excels in applications requiring high wear resistance and impact durability. Its ability to strengthen through cold working and compatibility with various fabrication processes make it a reliable choice in heavy-duty industries.
Material data sheet 1.3401
| DIN | AISI | BS | AFNOR | UNI |
|---|---|---|---|---|
| 1.3401 | A 128 | BW 10 | Z 120 M 12 | X 120 Mn 12 |
Chemical composition
| C | Mn | Si | P | S |
|---|---|---|---|---|
| 1,10 – 1,30 | 12,00 – 13,00 | 0,30 – 0,50 | max. 0,100 | max. 0,04 |
Mechanical properties at room temperature
| Dimensions | Yield point N/mm² | Tensile strength N/mm² | Ductile yield (Lo=5do) | Contraction % |
|---|---|---|---|---|
| <= 16 mm | >= 410 | 680 – 1180 | >= 40 | >= 40 |
| 17 mm – 40 mm | >= 390 | 830 – 1080 | >= 42 | >= 40 |
| 41 mm – 100 mm | >= 345 | 780 – 1080 | >= 45 | >= 45 |
