7CrSiMnMoV belongs to the series of high carbon low alloy cold work tool steel. The typical elements are Cr, Si, Mn. A little amount of strengthening elements, like Mo and V are also included.
7CrSiMnMoV is a new type of cold work tool mold steel. It has good hardenability and can be hardened by Air cooling. Its hardness can reach HRC62~64. The quenching deformation is small. The steel has high strength and excellent toughness.
Equivalent Grade
Country
China
Japan
Standard
GB
Grade
7CrSiMnMoV
CH-1
Chemical composition:
C(％)
Si(％)
Mn(％)
P(％)
S(％)
Cr(％)
Mo(％)
V(%)
0.65～0.75
0.85～1.15
0.65～1.05
≤0.030
≤0.030
0.90～1.20
0.20～0.50
0.15～0.30
7CrSiMnMoV Mechanical Properties
Yield
Rp0.2 (MPa)
752 (≥)
Tensile
Rm (MPa)
985 (≥)
Impact
KV/Ku (J)
43
Elongation
A (%)
42
Reduction in cross-section on fracture
Z (%)
22
As-Heat-Treated Condition
_
Solution and Aging, Annealing, Ausaging, Q+T,etc
Brinell hardness
(HBW)
242
Physical Properties
Temperature
(°C)
12(°C)
923(°C)
321(°C)
Modulus of elasticity
(GPa)
–
815
–
Mean coefficient of thermal expansion
10-6/(°C) between 20(°C) and
–
–
11
Thermal conductivity
(W/m·°C)
_
23.3
12.2
Specific thermal capacity
(J/kg·°C)
_
314
Specific electrical resistivity
(Ω mm²/m)
0.31
_
_
Density
(kg/dm³)
–
–
234
Poisson’s coefficient, ν
_
_
_
144
Heat Treatment Specification
Annealing: 860 to 840℃, slow cooling in furnace 3 to 4 hrs, down to approx. 550℃, cooling in air. Hardness after annealing: max. 241HB.
Hardening: flame hardening
Item
Preheating ℃
Heating temperature ℃
Cooling method
Hardness
Quenching
180～200 ℃, 2H
900～1000
Air cooling
62～64HRC
Tempering
180～200
Air cooling
58～62HRC
Item
Heating temperature/℃
Initial forging temperature/℃
Final forging temperature/℃
Cooling
Ingot
1200
1100~1150
800~850
Slow cooling
Prpoducts Range and Delivery Status
Product type
Products
Dimension
Processes
Deliver Status
Plates/Sheets
Plates/Sheets
0.08-200mm(T)*W*L
Forging,hot rolling and cold rolling
Annealed,Solution and Aging,Q+T,ACID-WASHED,Shot Blasting
Steel Bar
Round Bar,Flat Bar,Square Bar
Φ8-1200mm*L
Forging,hot rolling and cold rolling,Cast
Black,Rough Turning,Shot Blasting,
Coil/Strip
Steel Coil/Steel Strip
0.03-16.0x1200mm
Cold-Rolled&Hot-Rolled
Annealed,Solution and Aging,Q+T,ACID-WASHED,Shot Blasting
