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ASTM 8Q

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ICI 4140 ICI 4330
#ASTM # #8Q

Description

USA AISI ASTM 8Q and ASTM 8Q Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Special Alloy: ASTM 8Q
Category Type Steel Grade Standard Country Application
Steel GradesSpecial Alloy ASTM 8Q AISI USA
ICI 1040
ICI 1050
ASTM 4A,4Q
ICI 6120
ASTM 5N
ASTM 6N
ICI 4020
ASTM 7Q
ICI 4130
ICI 4140

Chemical composition(mass fraction)(wt.%) of the ASTM 8Q

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Ni(％) Mo(％) W(%) Cu(%)
0.35-0.45 0.20-0.80 0.70-1.00 Max 0.04 Max 0.045 0.80-1.10 Max 0.50 0.15-0.25 Max 0.10 Max 0.50

Mechanical Properties of steel grade ASTM 8Q

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)
578 (≥) 713 (≥) 34 44 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 311

Physical Properties of steel grade ASTM 8Q

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
24 - -     0.44 -  
742 642 - 22.3 413   -  
671 - 21 14.2   114 341

Heat Treatment of steel grade ASTM 8Q

Heat treated : 1528°C - 1532°C

Technological Curves of steel grade ASTM 8Q

Cross Reference Table (Equivalent Grade) of ASTM 8Q

Grade Standard Country Application
ASTM 1030 ASTM USA General use carbon steel bar
ASTM 1005 ASTM USA General use carbon steel bar
ASTM 1006 ASTM USA General use carbon steel bar
ASTM 1008 ASTM USA General use carbon steel bar
ASTM 1010 ASTM USA General use carbon steel bar
ASTM 1013 ASTM USA General use carbon steel bar
ASTM 1015 ASTM USA General use carbon steel bar
ASTM 1016 ASTM USA General use carbon steel bar
ASTM 1017 ASTM USA General use carbon steel bar
ASTM 1018 ASTM USA General use carbon steel bar
ASTM 1019 ASTM USA General use carbon steel bar
ASTM 1020 ASTM USA General use carbon steel bar
ASTM 1021 ASTM USA General use carbon steel bar
ASTM W1-A ASTM USA Carbon tool steel
ASTM A182 F55 ASTM USA Super Duplex
ASTM 431 ASTM USA Martensitic special steel
ASTM 440A ASTM USA Martensitic special steel
ASTM 440B ASTM USA Martensitic special steel
ASTM 440C ASTM USA Martensitic special steel
ASTM 501 ASTM USA Martensitic special steel
ICI 4140 ICI 4330
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