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Description

USA AISI C-7A Machining with carbide and C-7A Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Tool Steel And Hard Alloy: C-7A
Category Type Steel Grade Standard Country Application
Steel GradesTool Steel And Hard Alloy C-7A AISI USA Machining with carbide
C-2
C-3
C-4
C-5
C-50
C-5A
C-6
C-60
C-6A
C-7

Chemical composition(mass fraction)(wt.%) of the C-7A

W(%) Co(%) Ti(%) Ta(%)
71.0-83.0 4.5-7.0 7.0-12.5 10.0-12.0

Mechanical Properties of steel grade C-7A

Yield
Rp0.2 (MPa)
Tensile
Rm (MPa)
Impact
KV/Ku (J)
Elongation
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
322 (≥) 252 (≥) 34 21 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 214

Physical Properties of steel grade C-7A

Temperature
(°C)
Modulus of elasticity
(GPa)
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)
Specific thermal capacity
(J/kg·°C)
Specific electrical resistivity
(Ω mm²/m)
Density
(kg/dm³)
Poisson’s coefficient, ν
21 - -     0.41 -  
272 172 - 31.3 332   -  
436 - 33 21.2   234 111

Heat Treatment of steel grade C-7A

Heat treated : 1724°C - 1881°C

Technological Curves of steel grade C-7A

Cross Reference Table (Equivalent Grade) of C-7A

Grade Standard Country Application
C-7A AISI USA Machining with carbide

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