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ASTM 4340

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UNS G43200 UNS G43400
#ASTM # # #4340

Description

ASTM 4340 Carbon Steel and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Carbon Steel: ASTM 4340
Category Type Steel Grade Standard Country Application
Steel GradesCarbon Steel ASTM 4340
ASTM 4145
UNS G41450
ASTM 4147
UNS G41470
ASTM 4150
UNS G41500
ASTM 4161
UNS G41610
ASTM 4320
UNS G43200

Chemical composition(mass fraction)(wt.%) of the ASTM 4340

C
≤		 Si
≤		 Mn
≤		 P
≤		 S
≤		 Cr Ni
0.38-0.43 0.15-0.35  0.6-0.8   0.035 0.04  0.7-0.9  1.65-2.0 
Mo Al Cu Nb Ti V Ce
0.2-0.3             
N Co Pb B Other    
             
             

Mechanical Properties of steel grade ASTM 4340

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)
995 (≥) 297 (≥) 24 42 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 121

Physical Properties of steel grade ASTM 4340

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
42 - -     0.21 -  
424 647 - 43.3 413   -  
652 - 43 24.2   322 421

Heat Treatment of steel grade ASTM 4340

Heat treated : 1438°C - 1225°C

Technological Curves of steel grade ASTM 4340

Cross Reference Table (Equivalent Grade) of ASTM 4340

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
UNS G43200 UNS G43400
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