Product properties
˙ High roughness
SpecificationDIN EN10085
31CrMoV9
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Introduction
Industrial Applications
˙ Machine industry
˙ Mainly used to manufacture parts of the gear and engine structure, such as the hydraulic piston, hydraulic piston rod, coupling shaft, link rod, steering knuckle, inner tooth ring, screw, and bolt
Specifications
Chemical composition (wt. %)
Element
C
Si
Mn
P
S
Cr
Mo
V
Min.
0.27
-
0.40
-
-
2.30
0.15
0.10
Max.
0.34
0.40
0.70
0.025
0.035
2.70
0.25
0.33
Physical Property
Density (g/cm^3)
7.8
Thermal Expansion Coefficient
Temperature (℃)
10^-6/℃
259
11
Thermal Conductivity
Temperature (℃)
W/m·K
945
12.3
Mechanical Property
Items
Annealed
Hardness
248 HBW max.
Size Ranges
Products
Diameter (mm)
Length (mm)
Rolled bar
10~95
3,000~5,700
Billet
130x130, 140x140, 150x150, 160x160
7,000 max
Forged bar
95.2~600
3,000~5,700
Flat bar
80x80 (min.)
Based on the customer needs
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