AISI 4340

This page provides AISI 4340 datasheet, AISI 4340 mechanical properties, chemical element AISI 4340, technical specifications of AISI 4340 steel material properties. AISI 4340 performance specifications.

Category Class Grade Standard Country Application
Steel GradesCarbon Steel AISI 4340
Datasheet for:Steel Grades:Carbon Steel:AISI 4340

Chemical composition(mass fraction)(wt.%) of the AISI 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 / Mechanische Eigenschaften / Caracteristiques mecaniques of grade AISI 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)
194 (≥) 142 (≥) 33 33 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 313
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
33 - -     0.11 -  
161 748 - 11.3 432   -  
611 - 12 42.2   241 213
Heat treated : 1149°C - 1734°C
Directory is being updated.
The material does not have direct Metallography properties.
Directory is being updated.
The material does not have direct Metallography properties.
Directory is being updated.
Cross Reference Table(Equivalent Grade)
Grade Standard Country Application
A-2 AISI USA
Applied to the thermosetting plastic mold, the hardened mould as a whole
A 240 S43400 SAE USA
Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications
A 554 S43400 SAE USA
Welded Stainless Steel Mechanical Tubing
S43400 AISI USA
Ferritic Chromium Molybdenum Stainless Steel
SA-240 S43400 AMS USA
Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications
AISI 4340 Suppliers

Haihong International Trade (HK) CO., Limited

Stainless Steel, Special Steel, Compressor Blading, Turbine Blading, Superalloy Supplier.
AISI 4340 can be supplied as steel plate/ sheet, round steel bar, steel tube/pipe, steel stripe, steel billet, steel ingot, steel wire rods. electroslag, forged ring/ block,etc.
TEL:+86-816-3646575 FAX: +86-816-3639422
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E-mail: sales@tool-die-steels.com
Website: http://www.tool-die-steels.com/
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