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..
