HP 9-4-20

HP 9-4-20 Stainless Steels to SAE AMS 6525D (2012)

HP 9-4-20 - Specification & Application

  • SAE AMS 6525D (2012) - Steel, Bars, Forgings, Tubing, and Rings 0.75Cr - 9.0Ni - 4.5Co - 1.0Mo - 0.09V (0.17 - 0.23C) Consumable Electrode Vacuum Melted
  • SAE AMS 6525 - This specification covers a premium aircraft-quality, low-alloy steel in the form of bars, forgings, mechanical tubing, flash welded rings, and stock for forging or flash welded rings.
  • AMS 6523 - This specification covers a premium aircraft-quality, low-alloy steel in the form of sheet, strip, and plate.

Steel, Bars, Forgings, Tubing, and Rings 0.75Cr - 9.0Ni - 4.5Co - 1.0Mo - 0.09V (0.17 - 0.23C) Consumable Electrode Vacuum Melted

Chemical composition(wt.%) of HP 9-4-20 grade: to SAE AMS 6525D (2012)

Elements Min.（≥） Max.（≤） Similar Remarks
C 0.17 0.23
Si - 0.20
Mn 0.20 0.40
Ni - 0.65
Cr 0.65 0.85
Mo 0.90 1.10
Ni 8.50 9.50
V 0.06 0.12
P - 0.01
S - 0.01
Cu - 0.35
Co 4.25 4.75

HP 9-4-20 - Detail

Steel, Bars, Forgings, Tubing, and Rings 0.75Cr - 9.0Ni - 4.5Co - 1.0Mo - 0.09V (0.17 - 0.23C) Consumable Electrode Vacuum Melted

Property

  Value
Tensile Strength 190 ksi
Yield Strength at 0.2% Offset 180 ksi
Elongation in 4D 12%
Reduction of Area 45%

Select AMS Number:

AMS Number Alloy Type UNS Cross Ref. Spec Misc./Shape
AMS 6468 HP 9-4-20 Steel K91461 - Wire  
AMS 6523 HP 9-4-20 Steel K91472  
AMS 6523 Plate HP 9-4-20 Steel K91472 - Plate  
AMS 6523 Sheet HP 9-4-20 Steel K91472 - Sheet  
AMS 6523 Strip HP 9-4-20 Steel K91472 - Strip  
AMS 6525 HP 9-4-20 Steel K91472  
AMS 6525 Bar HP 9-4-20 Steel K91472 - Bar  
AMS 6525 Forging HP 9-4-20 Steel K91472 - Forging  
AMS 6525 Ring HP 9-4-20 Steel K91472 - Ring  
AMS 6525 Tubing HP 9-4-20 Steel K91472 - Tubing  

Mechanical properties of grade HP 9-4-20 SAE AMS 6525D (2012)

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)
674 (≥) 287 (≥) 13 43 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 111

Physical properties of grade HP 9-4-20 SAE AMS 6525D (2012)

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
221 (≥) 632 (≥) 21 21 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 233
Temp.
°C/°F		 Creep strain limit
(10000h)
(Rp1,0) N/mm2		 Creep rupture strength
(10000h)
(Rp1,0) N/mm2
655 787 871

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 HP 9-4-20 grade, contact us for the best solution.
–sales@specificsteel.com