A 646 Grade H-11 Stainless Steels to A 646/A 646M (2011)

A 646 Grade H-11 - Specification & Application

  • A 646/A 646M (2011) - Premium Quality Alloy Steel Blooms and Billets for Aircraft and Aerospace Forgings

Premium Quality Alloy Steel Blooms and Billets for Aircraft and Aerospace Forgings

Chemical composition(wt.%) of A 646 Grade H-11 grade: to A 646/A 646M (2011)

Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.40
Si - 0.90
Mn - 0.30
P - -
S - -
Ni - -
Cr - 5.00
Al - -
Cu - -
Ti - -
Fe - remaining
Mo - 1.30
Co - -
V - 0.50

A 646 Grade H-11 - Detail

Premium Quality Alloy Steel Blooms and Billets for Aircraft and Aerospace Forgings

Mechanical properties of grade A 646 Grade H-11 A 646/A 646M (2011)

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)
263 (≥) 464 (≥) 22 34 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 213

Physical properties of grade A 646 Grade H-11 A 646/A 646M (2011)

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
848 (≥) 838 (≥) 43 22 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 324
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
661 268 674

Equivalent Products

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