A 646 Grade HP 9-4-30

A 646 Grade HP 9-4-30 Stainless Steels to A 646/A 646M (2011)

A 646 Grade HP 9-4-30 - 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 HP 9-4-30 grade: to A 646/A 646M (2011)

Elements Min.（≥） Max.（≤） Similar Remarks
C 0.29 0.34
Si - 0.10
Mn 0.10 0.35
Ni 7.00 8.00
Cr 0.90 1.10
Al - -
Cu - -
Ti - -
Fe - -
Mo 0.90 1.10
Co 4.25 4.75
V 0.06 0.12
P - 0.01
S - 0.01

A 646 Grade HP 9-4-30 - Detail

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

Mechanical properties of grade A 646 Grade HP 9-4-30 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)
764 (≥) 986 (≥) 33 13 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 414

Physical properties of grade A 646 Grade HP 9-4-30 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
811 (≥) 994 (≥) 41 43 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 224
Temp.
°C/°F		 Creep strain limit
(10000h)
(Rp1,0) N/mm2		 Creep rupture strength
(10000h)
(Rp1,0) N/mm2
463 753 536

Equivalent Grade

1 ASTM HP 2 A 646 Grade HP 9-4-20 3 HP 9-4-20 4 HP 9-4-20 5 HP 9-4-20 6 HP 9-4-20 7 HP 9-4-25 8 HP 9-4-25 9 A 646 Grade HP 9-4-30 10 HP 9-4-30 11 HP 9-4-30

Equivalent Products

Product shapes we supply:

We can customize the production of A 646 Grade HP 9-4-30 grade, contact us for the best solution.
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