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A 646 Grade HP 9-4-20

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H-46 HP 9-4-20
#HP #9-4-20

Description

USA SAE A 646/A 646M (2011), A 646 Grade HP 9-4-20 Specialsteel Premium Quality Alloy Steel Blooms and Billets for Aircraft and Aerospace Forgings and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: A 646 Grade HP 9-4-20
Category Class Grade Type Standard Country Application
Steel GradesSpecialsteel A 646 Grade HP 9-4-20 Precipitation-Hardening SAE USA Premium Quality Alloy Steel Blooms and Billets for Aircraft and Aerospace Forgings

Chemical composition(mass fraction)(wt.%) of the A 646 Grade HP 9-4-20

C Si Mn Ni Cr Al Cu Ti Fe Mo Co V P S W
0.17 -0.23 ≤0.10 ≤0.20 ≤0.65 ≤0.40 4.25 -4.75 ≤ ≥ ≤ ≥ ≤ ≥ ≤0.85 8.50 -9.50 0.06 -0.12 ≤0.01 ≤0.01 0.90 -1.10

Mechanical Properties of steel grade A 646 Grade HP 9-4-20

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)
177 (≥) 246 (≥) 14 31 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 342

Physical Properties of steel grade A 646 Grade HP 9-4-20

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
31 - -     0.34 -  
297 221 - 23.3 423   -  
168 - 13 22.2   332 344

Heat Treatment of steel grade A 646 Grade HP 9-4-20

Heat treated : 1893°C - 1783°C

Technological Curves of steel grade A 646 Grade HP 9-4-20

Cross Reference Table (Equivalent Grade) of A 646 Grade HP 9-4-20

Grade Standard Country Application
HP-10
439 HP-10
AL 441HP
HP 9-4-20
HP 9-4-25
HP 9-4-30
A709 Gr.HPS50W
A709 Gr.HPS70W
A709 Gr.HPS100W
ASTM HP
ASTM HP
ASTM HP
ASTM HP

Relevant standard of A 646 Grade HP 9-4-20

A 646/A 646M (2011) Premium Quality Alloy Steel Blooms and Billets for Aircraft and Aerospace Forgings A-646-A-646M-(2011).pdf
H-46 HP 9-4-20
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Jiangyou Longhai Special Steel Co.,Ltd.
Jiangyou Longhai Special Steel Co.,Ltd.

Our main peoducts of steel are many kinds of special steel, like tool steel, mould steel, alloy steel, alloy constructural steel, heat-resistant steel, high speed tool steel,spring steel and bearing steel , stainless steel and so on, which have formed 12 series and more than 350 varieties with n...

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