420J1/420J2

*Type Austenite

Characteristics

    420J1: High hardness after tempering and very good abrasion resistance (magnetic) 420J2: compared with 420J1 steel has higher hardness after tempering (magnetic).

Chemical compositions and physical properties

Designations Chemical compositions (%) Mechanical properties Physical properties
 JIS   POSCO   C   Cr   Ni   Mo   Orthers   Yield 
 Strength 
 N/mm² 
 Tensile 
 Strength 
 N/mm² 
 Elongate 

 % 
 Hadness 

 Hv 
 Specific 
 Heat 
 J/gºC 
 Specific 
 Gravity 
 Thermal 
 Expansion 
 Coefficient 
 W/m-ºC 
 Thermal 
 Conductivity 
 W/m-ºC 
 420J1 
 420J2 
 420J1 
 420J2 
 0.16~0.25 
 0.26~0.40 
 12.0~14.0 
 12.0~14.0 
 -   -   -   ≥225 
 ≥225 
 ≥520   ≥18   ≤234   0.46   7.75   10.3   23.8 

Applications

    - Types of products that require corrosion and rust protection, such as high-class food cutters, etc. Products that require anti-corrosion properties, such as machinery parts, etc..