12MN
  
Identification

 

Designation by Standards
Brand Name Ravne No. Mat. No. DIN EN AISI
12MN 901 1.3401 X120Mn12 - A128 grade A

 

Chemical Composition

 

Chemical Composition in Weight %
C Si Mn Cr Mo Ni V W Others
1.20 0.40 12.50 max. 1.50 - - - - -

 

General Information

Description
Austenitic Mn-steel. The well-known Hadfield steel still has broad applications in the mineral processing industry. Especially under impact loading Hadfield steel displays good wear resistance due to its high cold work ability. However, Hadfield steel is not corrosion resistant.

Applications
Components for dredgers and crushers, conveying machines: crushings jaws, impact wedges, linings, etc.

 

Properties

Physical properties (avarage values) at ambient temperature:
Modulus of elasticity [103 x N/mm2]: 190-210
Density [g/cm3]: 7.88

 

Heat Treatment

Hardening
Harden from a temperature of 1000-1050 'C followed by water quenching. Hardness after quenching is about 200 HB.

Mechnical properties at ambient temperature:
0.2 % proof stress (N/mm2): 350
Tensile strength (N/mm2): 800-1000

 

Workability


Forging
Hot forming temperature: 1050-850 'C

Machinability
The machinability of this steel is poor.