AISI D2 TOOL STEEL BALLS

High carbon and high chromium tool steel balls, they feature good dimensional stability, high mechanical properties and abrasion/wear resistance.
Applications
Special bearings for applications where high mechanical properties in medium aggressive environments are required.
Chemical composition
%C
%Si
%Mn
%P
%S
%Cr
%Mo
%V
-
-
-
1.40-1.60
0.10-0.60
0.10-0.60
0.030 max
0.030 max
11.00-13.00
0.70-1.20
0.50-1.10
-
-
-
International standards
ITA
USA
GER
FRA
UK
RUS
CHN
JAP
X155CrVMo121KU
D2 / T30402
1.2379
Z160CDV12
BD2
-
Cr12Mo1V1
SKD 11
Physical / mechanical / thermal / electric / magnetic properties
Property
Symbol
U.o.M.
Type
Notes
Values
Density
δ
[g/cm3]
Physical
Room temp.
7.67
Young's modulus
E
[GPa]
Mechanical
-
209
Specific heat
c
[J/kg-K]
Thermal
Room temp.
460
Coefficient of linear thermal expansion
α
[10^-6/ºC]
Thermal
(ΔT=0-100°C)
11.4
Thermal conductivity
λ
[W/(m·K)]
Thermal
Room temp.
20.5
Electric resistivity
ρ
[Ω*m*10^-9]
Electric
-
650
Relative magnetic permeability
µ
-
Magnetic
Ferromagnetic
> 500
Technical data
Property
Type
U.o.M.
Values
U.o.M.
Values
Hardness
Mechanical
[HRC]
55 - 65
-
-
Ultimate tensile strength
Mechanical
[MPa]
2100 - 2500
[psix10^3]
304 - 362
Service temperature
Thermal
[ºC]
0 / 400
[ºF]
32 / 752
Range
Diameters (min/max)
U.o.M.
Diameters (min/max)
U.o.M.
Precision grades
1.000 - 150.000
[mm]
3/64 - 6
["]
See section International Standards: ISO 3290-1 / DIN 5401 / AFBMA
Corrosion Resistance
D2 tool steel balls feature a corrosion resistance slightly better than AISI 420C martensitic stainless steel.
Revision n.2