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Description

Japan JIS SUS440A Martensitic special steel and SUS440A Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Special Steel: SUS440A
Category Type Steel Grade Standard Country Application
Steel GradesSpecial Steel SUS440A JIS Japan Martensitic special steel
SUS403
SUS410
SUS410J1
SUS410F2
SUS416
SUS420J1
SUS420J2
SUS420F
SUS420F2
SUS431

Chemical composition(mass fraction)(wt.%) of the SUS440A

C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Ni(%) Mo(%)
0.60-0.75 Max 1.00 Max 1.00 Max 0.04 Max 0.03 16.0-18.0 Max 0.60 Max 0.75

Mechanical Properties of steel grade SUS440A

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)
474 (≥) 873 (≥) 14 21 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 413

Physical Properties of steel grade SUS440A

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
41 - -     0.43 -  
872 183 - 14.3 122   -  
316 - 43 13.2   324 442

Heat Treatment of steel grade SUS440A

Heat treated : 1489°C - 1519°C

Technological Curves of steel grade SUS440A

Cross Reference Table (Equivalent Grade) of SUS440A

Grade Standard Country Application
SUS440A JIS Japan Martensitic special steel

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