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Description

AISI AISI A4 Tool Steel and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Tool Steel: AISI A4
Category Type Steel Grade Standard Country Application
Steel GradesTool Steel AISI A4 AISI
1.2767
AISI A10
AISI A2
AISI A3
ASP 30 PM
ASP 60 PM
CG40
CN02
SKH53
1.4088

Chemical composition(mass fraction)(wt.%) of the AISI A4

 

Category Steel
Class Tool steel
Type Air-hardening medium-alloy cold work steel
Designations United States: ASTM A681 , FED QQ-T-570 , UNS T30104

Composition

 

Element Weight %
C  0.95-1.05 
Mn  1.80-2.20 
Si  0.50 
Cr  0.90-2.20 
Ni  0.30 
Mo  0.90-1.40 
Cu  0.25 
P  0.03 
S  0.03 

Mechanical Properties

 

Properties  Conditions
T (°C) Treatment
Density (×1000 kg/m3) 7.7-8.03 25  
Poisson's Ratio 0.27-0.30 25  
Elastic Modulus (GPa) 190-210 25  

 

Mechanical Properties of steel grade AISI A4

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)
869 (≥) 633 (≥) 21 34 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 414

Physical Properties of steel grade AISI A4

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 -  
684 838 - 24.3 442   -  
116 - 22 24.2   234 134

Heat Treatment of steel grade AISI A4

Heat treated : 1638°C - 1862°C

Technological Curves of steel grade AISI A4

Cross Reference Table (Equivalent Grade) of AISI A4

Grade Standard Country Application
AISI 431 AISI USA Martensitic special steel
AISI 440A AISI China Martensitic special steel
AISI 440B AISI USA Martensitic special steel
AISI 440F AISI USA Martensitic special steel
AISI 440F Se AISI USA Martensitic special steel
AISI 501 AISI USA Martensitic special steel
AISI 501A AISI USA Martensitic special steel
AISI 501B AISI USA Martensitic special steel
AISI 502 AISI USA Martensitic special steel
AISI 503 AISI USA Martensitic special steel
AISI 504 AISI USA Martensitic special steel
AISI S13800 USA precipitation hardening
AISI S15500 AISI USA precipitation hardening
AISI 632 AISI USA precipitation hardening
AISI 630 AISI USA precipitation hardening
AISI 635 AISI USA precipitation hardening
AISI 631 AISI USA precipitation hardening
AISI 633 AISI USA precipitation hardening
AISI 633 AISI USA precipitation hardening
AISI 634 AISI USA precipitation hardening

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