ASTM440A Stainless Steels

ASTM440A - Specification & Application

ASTM440A

Chemical composition(wt.%) of ASTM440A grade:

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.60 0.75
Si - 1.00
Mn - 1.00
P - 0.04
S - 0.03
Cr 16.0 18.0
Mo - 0.75

ASTM440A - Detail

ASTM440A

Mechanical properties of grade ASTM440A

Proof strength
Rp0.2 (MPa)
Tensile strength
Rm (MPa)
Impact energy
KV (J)
Elongation at fracture
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
348 (≥) 232 (≥) 13 41 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 213

Physical properties of grade ASTM440A

Property Density
kg/dm3
Temperature T
°C/F
Specific heat
J / kgK
Thermal conductivity
W/mK
Electric resistance
µΩ·cm
Modulus of elasticity
kN/mm2
Expansion rate
454 (≥) 565 (≥) 31 41 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 412
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
343 322 227
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