SAE 4140

This page provides SAE 4140 datasheet, SAE 4140 mechanical properties, chemical element SAE 4140, technical specifications of SAE 4140 steel material properties. SAE 4140 performance specifications.

Category Class Grade Standard Country Application
Steel GradesCarbon Steel SAE 4140
Datasheet for:Steel Grades:Carbon Steel:SAE 4140

Chemical composition(mass fraction)(wt.%) of the SAE 4140

C
Si
Mn
P
S
Cr Ni
0.38-0.43  0.15-0.35  0.75-1 0.035 0.04  0.8-1.1  
Mo Al Cu Nb Ti V Ce
0.15-0.25            
N Co Pb B Other    
             
             

Mechanical properties / Mechanische Eigenschaften / Caracteristiques mecaniques of grade SAE 4140

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)
363 (≥) 631 (≥) 14 43 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 321
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
23 - -     0.23 -  
467 536 - 14.3 223   -  
323 - 42 14.2   432 143
Heat treated : 1838°C - 1279°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 276 S41400 SAE USA
Stainless Steel Bars and Shapes
A 314 S41400 SAE USA
Stainless Steel Billets and Bars for Forging
A 473 S41400 SAE USA
Stainless Steel Forgings
A 580 S41400 SAE USA
Stainless Steel Wire
S41400 AISI USA
Martensitic Chromium Stainless Steel
NV7(4140) UNS USA
Steel for intake valves
H41400 AISI USA
Steel for intake valves
SAE 4140 Suppliers

Haihong International Trade (HK) CO., Limited

Stainless Steel, Special Steel, Compressor Blading, Turbine Blading, Superalloy Supplier.
SAE 4140 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.
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